Multi-layered thermal barrier coatings fabricated by plasma-spraying and dry-ice blasting: Microstructure characterization and prolonged lifetime
The quality of bond coat and top coat of thermal barrier coatings (TBCs) has strong influences on their lifetime at high temperature. Especially, the oxygen content level and the surface roughness of bond coat as well as the porosity of top coat have been demonstrated to play an important role in th...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Dong, Shujuan [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2013transfer abstract |
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| Umfang: |
11 |
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| Übergeordnetes Werk: |
Enthalten in: A high efficiency solar steam generation system with using residual heat to enhance steam escape - Bai, Binglin ELSEVIER, 2020, Amsterdam [u.a.] |
|---|---|
| Übergeordnetes Werk: |
volume:236 ; year:2013 ; day:15 ; month:12 ; pages:557-567 ; extent:11 |
| Links: |
|---|
| DOI / URN: |
10.1016/j.surfcoat.2013.10.066 |
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ELV016755308 |
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| 520 | |a The quality of bond coat and top coat of thermal barrier coatings (TBCs) has strong influences on their lifetime at high temperature. Especially, the oxygen content level and the surface roughness of bond coat as well as the porosity of top coat have been demonstrated to play an important role in the thermomechanical behavior of TBCs. In this study, dry-ice blasting was used during the preparation of TBCs which were composed of atmospheric plasma sprayed CoNiCrAlY bond coat and YSZ top coat. Three sets of TBCs deposited with different dry-ice (CO2) blasting treatments were compared with respect to the coating microstructure evolution, the growth behavior of thermally grown oxide (TGO), crack propagation and thermal shock resistance during thermal cycling exposure. It was interesting to find that different microstructures of bond coat and top coat were obtained under different spraying conditions. Moreover, the results showed that CoNiCrAlY bond coats continue to be oxidized during the deposition process of YSZ top coats when they are plasma-sprayed without dry-ice blasting. The three sets of prepared TBCs have different thermal shock lifetime. TBC with APS dry-ice blasted bond coat and APS dry-ice blasted top coat was the most durable and exhibited significant improvement in lifetime. The remarkable decrease in the oxide content and the porosity of bond coat, the increase in the “vertical” porosity of top coat and the improvement in the bonding strength at the bond coat/top coat interface appeared to contribute to the prolonged lifetime. | ||
| 520 | |a The quality of bond coat and top coat of thermal barrier coatings (TBCs) has strong influences on their lifetime at high temperature. Especially, the oxygen content level and the surface roughness of bond coat as well as the porosity of top coat have been demonstrated to play an important role in the thermomechanical behavior of TBCs. In this study, dry-ice blasting was used during the preparation of TBCs which were composed of atmospheric plasma sprayed CoNiCrAlY bond coat and YSZ top coat. Three sets of TBCs deposited with different dry-ice (CO2) blasting treatments were compared with respect to the coating microstructure evolution, the growth behavior of thermally grown oxide (TGO), crack propagation and thermal shock resistance during thermal cycling exposure. It was interesting to find that different microstructures of bond coat and top coat were obtained under different spraying conditions. Moreover, the results showed that CoNiCrAlY bond coats continue to be oxidized during the deposition process of YSZ top coats when they are plasma-sprayed without dry-ice blasting. The three sets of prepared TBCs have different thermal shock lifetime. TBC with APS dry-ice blasted bond coat and APS dry-ice blasted top coat was the most durable and exhibited significant improvement in lifetime. The remarkable decrease in the oxide content and the porosity of bond coat, the increase in the “vertical” porosity of top coat and the improvement in the bonding strength at the bond coat/top coat interface appeared to contribute to the prolonged lifetime. | ||
| 700 | 1 | |a Song, Bo |4 oth | |
| 700 | 1 | |a Zhou, Genshu |4 oth | |
| 700 | 1 | |a Hansz, Bernard |4 oth | |
| 700 | 1 | |a Liao, Hanlin |4 oth | |
| 700 | 1 | |a Coddet, Christian |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier Science |a Bai, Binglin ELSEVIER |t A high efficiency solar steam generation system with using residual heat to enhance steam escape |d 2020 |g Amsterdam [u.a.] |w (DE-627)ELV004415906 |
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10.1016/j.surfcoat.2013.10.066 doi GBVA2013007000030.pica (DE-627)ELV016755308 (ELSEVIER)S0257-8972(13)01000-1 DE-627 ger DE-627 rakwb eng 620 670 620 DE-600 670 DE-600 570 690 VZ 58.51 bkl Dong, Shujuan verfasserin aut Multi-layered thermal barrier coatings fabricated by plasma-spraying and dry-ice blasting: Microstructure characterization and prolonged lifetime 2013transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The quality of bond coat and top coat of thermal barrier coatings (TBCs) has strong influences on their lifetime at high temperature. Especially, the oxygen content level and the surface roughness of bond coat as well as the porosity of top coat have been demonstrated to play an important role in the thermomechanical behavior of TBCs. In this study, dry-ice blasting was used during the preparation of TBCs which were composed of atmospheric plasma sprayed CoNiCrAlY bond coat and YSZ top coat. Three sets of TBCs deposited with different dry-ice (CO2) blasting treatments were compared with respect to the coating microstructure evolution, the growth behavior of thermally grown oxide (TGO), crack propagation and thermal shock resistance during thermal cycling exposure. It was interesting to find that different microstructures of bond coat and top coat were obtained under different spraying conditions. Moreover, the results showed that CoNiCrAlY bond coats continue to be oxidized during the deposition process of YSZ top coats when they are plasma-sprayed without dry-ice blasting. The three sets of prepared TBCs have different thermal shock lifetime. TBC with APS dry-ice blasted bond coat and APS dry-ice blasted top coat was the most durable and exhibited significant improvement in lifetime. The remarkable decrease in the oxide content and the porosity of bond coat, the increase in the “vertical” porosity of top coat and the improvement in the bonding strength at the bond coat/top coat interface appeared to contribute to the prolonged lifetime. The quality of bond coat and top coat of thermal barrier coatings (TBCs) has strong influences on their lifetime at high temperature. Especially, the oxygen content level and the surface roughness of bond coat as well as the porosity of top coat have been demonstrated to play an important role in the thermomechanical behavior of TBCs. In this study, dry-ice blasting was used during the preparation of TBCs which were composed of atmospheric plasma sprayed CoNiCrAlY bond coat and YSZ top coat. Three sets of TBCs deposited with different dry-ice (CO2) blasting treatments were compared with respect to the coating microstructure evolution, the growth behavior of thermally grown oxide (TGO), crack propagation and thermal shock resistance during thermal cycling exposure. It was interesting to find that different microstructures of bond coat and top coat were obtained under different spraying conditions. Moreover, the results showed that CoNiCrAlY bond coats continue to be oxidized during the deposition process of YSZ top coats when they are plasma-sprayed without dry-ice blasting. The three sets of prepared TBCs have different thermal shock lifetime. TBC with APS dry-ice blasted bond coat and APS dry-ice blasted top coat was the most durable and exhibited significant improvement in lifetime. The remarkable decrease in the oxide content and the porosity of bond coat, the increase in the “vertical” porosity of top coat and the improvement in the bonding strength at the bond coat/top coat interface appeared to contribute to the prolonged lifetime. Song, Bo oth Zhou, Genshu oth Hansz, Bernard oth Liao, Hanlin oth Coddet, Christian oth Enthalten in Elsevier Science Bai, Binglin ELSEVIER A high efficiency solar steam generation system with using residual heat to enhance steam escape 2020 Amsterdam [u.a.] (DE-627)ELV004415906 volume:236 year:2013 day:15 month:12 pages:557-567 extent:11 https://doi.org/10.1016/j.surfcoat.2013.10.066 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 58.51 Abwassertechnik Wasseraufbereitung VZ AR 236 2013 15 1215 557-567 11 045F 620 |
| spelling |
10.1016/j.surfcoat.2013.10.066 doi GBVA2013007000030.pica (DE-627)ELV016755308 (ELSEVIER)S0257-8972(13)01000-1 DE-627 ger DE-627 rakwb eng 620 670 620 DE-600 670 DE-600 570 690 VZ 58.51 bkl Dong, Shujuan verfasserin aut Multi-layered thermal barrier coatings fabricated by plasma-spraying and dry-ice blasting: Microstructure characterization and prolonged lifetime 2013transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The quality of bond coat and top coat of thermal barrier coatings (TBCs) has strong influences on their lifetime at high temperature. Especially, the oxygen content level and the surface roughness of bond coat as well as the porosity of top coat have been demonstrated to play an important role in the thermomechanical behavior of TBCs. In this study, dry-ice blasting was used during the preparation of TBCs which were composed of atmospheric plasma sprayed CoNiCrAlY bond coat and YSZ top coat. Three sets of TBCs deposited with different dry-ice (CO2) blasting treatments were compared with respect to the coating microstructure evolution, the growth behavior of thermally grown oxide (TGO), crack propagation and thermal shock resistance during thermal cycling exposure. It was interesting to find that different microstructures of bond coat and top coat were obtained under different spraying conditions. Moreover, the results showed that CoNiCrAlY bond coats continue to be oxidized during the deposition process of YSZ top coats when they are plasma-sprayed without dry-ice blasting. The three sets of prepared TBCs have different thermal shock lifetime. TBC with APS dry-ice blasted bond coat and APS dry-ice blasted top coat was the most durable and exhibited significant improvement in lifetime. The remarkable decrease in the oxide content and the porosity of bond coat, the increase in the “vertical” porosity of top coat and the improvement in the bonding strength at the bond coat/top coat interface appeared to contribute to the prolonged lifetime. The quality of bond coat and top coat of thermal barrier coatings (TBCs) has strong influences on their lifetime at high temperature. Especially, the oxygen content level and the surface roughness of bond coat as well as the porosity of top coat have been demonstrated to play an important role in the thermomechanical behavior of TBCs. In this study, dry-ice blasting was used during the preparation of TBCs which were composed of atmospheric plasma sprayed CoNiCrAlY bond coat and YSZ top coat. Three sets of TBCs deposited with different dry-ice (CO2) blasting treatments were compared with respect to the coating microstructure evolution, the growth behavior of thermally grown oxide (TGO), crack propagation and thermal shock resistance during thermal cycling exposure. It was interesting to find that different microstructures of bond coat and top coat were obtained under different spraying conditions. Moreover, the results showed that CoNiCrAlY bond coats continue to be oxidized during the deposition process of YSZ top coats when they are plasma-sprayed without dry-ice blasting. The three sets of prepared TBCs have different thermal shock lifetime. TBC with APS dry-ice blasted bond coat and APS dry-ice blasted top coat was the most durable and exhibited significant improvement in lifetime. The remarkable decrease in the oxide content and the porosity of bond coat, the increase in the “vertical” porosity of top coat and the improvement in the bonding strength at the bond coat/top coat interface appeared to contribute to the prolonged lifetime. Song, Bo oth Zhou, Genshu oth Hansz, Bernard oth Liao, Hanlin oth Coddet, Christian oth Enthalten in Elsevier Science Bai, Binglin ELSEVIER A high efficiency solar steam generation system with using residual heat to enhance steam escape 2020 Amsterdam [u.a.] (DE-627)ELV004415906 volume:236 year:2013 day:15 month:12 pages:557-567 extent:11 https://doi.org/10.1016/j.surfcoat.2013.10.066 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 58.51 Abwassertechnik Wasseraufbereitung VZ AR 236 2013 15 1215 557-567 11 045F 620 |
| allfields_unstemmed |
10.1016/j.surfcoat.2013.10.066 doi GBVA2013007000030.pica (DE-627)ELV016755308 (ELSEVIER)S0257-8972(13)01000-1 DE-627 ger DE-627 rakwb eng 620 670 620 DE-600 670 DE-600 570 690 VZ 58.51 bkl Dong, Shujuan verfasserin aut Multi-layered thermal barrier coatings fabricated by plasma-spraying and dry-ice blasting: Microstructure characterization and prolonged lifetime 2013transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The quality of bond coat and top coat of thermal barrier coatings (TBCs) has strong influences on their lifetime at high temperature. Especially, the oxygen content level and the surface roughness of bond coat as well as the porosity of top coat have been demonstrated to play an important role in the thermomechanical behavior of TBCs. In this study, dry-ice blasting was used during the preparation of TBCs which were composed of atmospheric plasma sprayed CoNiCrAlY bond coat and YSZ top coat. Three sets of TBCs deposited with different dry-ice (CO2) blasting treatments were compared with respect to the coating microstructure evolution, the growth behavior of thermally grown oxide (TGO), crack propagation and thermal shock resistance during thermal cycling exposure. It was interesting to find that different microstructures of bond coat and top coat were obtained under different spraying conditions. Moreover, the results showed that CoNiCrAlY bond coats continue to be oxidized during the deposition process of YSZ top coats when they are plasma-sprayed without dry-ice blasting. The three sets of prepared TBCs have different thermal shock lifetime. TBC with APS dry-ice blasted bond coat and APS dry-ice blasted top coat was the most durable and exhibited significant improvement in lifetime. The remarkable decrease in the oxide content and the porosity of bond coat, the increase in the “vertical” porosity of top coat and the improvement in the bonding strength at the bond coat/top coat interface appeared to contribute to the prolonged lifetime. The quality of bond coat and top coat of thermal barrier coatings (TBCs) has strong influences on their lifetime at high temperature. Especially, the oxygen content level and the surface roughness of bond coat as well as the porosity of top coat have been demonstrated to play an important role in the thermomechanical behavior of TBCs. In this study, dry-ice blasting was used during the preparation of TBCs which were composed of atmospheric plasma sprayed CoNiCrAlY bond coat and YSZ top coat. Three sets of TBCs deposited with different dry-ice (CO2) blasting treatments were compared with respect to the coating microstructure evolution, the growth behavior of thermally grown oxide (TGO), crack propagation and thermal shock resistance during thermal cycling exposure. It was interesting to find that different microstructures of bond coat and top coat were obtained under different spraying conditions. Moreover, the results showed that CoNiCrAlY bond coats continue to be oxidized during the deposition process of YSZ top coats when they are plasma-sprayed without dry-ice blasting. The three sets of prepared TBCs have different thermal shock lifetime. TBC with APS dry-ice blasted bond coat and APS dry-ice blasted top coat was the most durable and exhibited significant improvement in lifetime. The remarkable decrease in the oxide content and the porosity of bond coat, the increase in the “vertical” porosity of top coat and the improvement in the bonding strength at the bond coat/top coat interface appeared to contribute to the prolonged lifetime. Song, Bo oth Zhou, Genshu oth Hansz, Bernard oth Liao, Hanlin oth Coddet, Christian oth Enthalten in Elsevier Science Bai, Binglin ELSEVIER A high efficiency solar steam generation system with using residual heat to enhance steam escape 2020 Amsterdam [u.a.] (DE-627)ELV004415906 volume:236 year:2013 day:15 month:12 pages:557-567 extent:11 https://doi.org/10.1016/j.surfcoat.2013.10.066 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 58.51 Abwassertechnik Wasseraufbereitung VZ AR 236 2013 15 1215 557-567 11 045F 620 |
| allfieldsGer |
10.1016/j.surfcoat.2013.10.066 doi GBVA2013007000030.pica (DE-627)ELV016755308 (ELSEVIER)S0257-8972(13)01000-1 DE-627 ger DE-627 rakwb eng 620 670 620 DE-600 670 DE-600 570 690 VZ 58.51 bkl Dong, Shujuan verfasserin aut Multi-layered thermal barrier coatings fabricated by plasma-spraying and dry-ice blasting: Microstructure characterization and prolonged lifetime 2013transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The quality of bond coat and top coat of thermal barrier coatings (TBCs) has strong influences on their lifetime at high temperature. Especially, the oxygen content level and the surface roughness of bond coat as well as the porosity of top coat have been demonstrated to play an important role in the thermomechanical behavior of TBCs. In this study, dry-ice blasting was used during the preparation of TBCs which were composed of atmospheric plasma sprayed CoNiCrAlY bond coat and YSZ top coat. Three sets of TBCs deposited with different dry-ice (CO2) blasting treatments were compared with respect to the coating microstructure evolution, the growth behavior of thermally grown oxide (TGO), crack propagation and thermal shock resistance during thermal cycling exposure. It was interesting to find that different microstructures of bond coat and top coat were obtained under different spraying conditions. Moreover, the results showed that CoNiCrAlY bond coats continue to be oxidized during the deposition process of YSZ top coats when they are plasma-sprayed without dry-ice blasting. The three sets of prepared TBCs have different thermal shock lifetime. TBC with APS dry-ice blasted bond coat and APS dry-ice blasted top coat was the most durable and exhibited significant improvement in lifetime. The remarkable decrease in the oxide content and the porosity of bond coat, the increase in the “vertical” porosity of top coat and the improvement in the bonding strength at the bond coat/top coat interface appeared to contribute to the prolonged lifetime. The quality of bond coat and top coat of thermal barrier coatings (TBCs) has strong influences on their lifetime at high temperature. Especially, the oxygen content level and the surface roughness of bond coat as well as the porosity of top coat have been demonstrated to play an important role in the thermomechanical behavior of TBCs. In this study, dry-ice blasting was used during the preparation of TBCs which were composed of atmospheric plasma sprayed CoNiCrAlY bond coat and YSZ top coat. Three sets of TBCs deposited with different dry-ice (CO2) blasting treatments were compared with respect to the coating microstructure evolution, the growth behavior of thermally grown oxide (TGO), crack propagation and thermal shock resistance during thermal cycling exposure. It was interesting to find that different microstructures of bond coat and top coat were obtained under different spraying conditions. Moreover, the results showed that CoNiCrAlY bond coats continue to be oxidized during the deposition process of YSZ top coats when they are plasma-sprayed without dry-ice blasting. The three sets of prepared TBCs have different thermal shock lifetime. TBC with APS dry-ice blasted bond coat and APS dry-ice blasted top coat was the most durable and exhibited significant improvement in lifetime. The remarkable decrease in the oxide content and the porosity of bond coat, the increase in the “vertical” porosity of top coat and the improvement in the bonding strength at the bond coat/top coat interface appeared to contribute to the prolonged lifetime. Song, Bo oth Zhou, Genshu oth Hansz, Bernard oth Liao, Hanlin oth Coddet, Christian oth Enthalten in Elsevier Science Bai, Binglin ELSEVIER A high efficiency solar steam generation system with using residual heat to enhance steam escape 2020 Amsterdam [u.a.] (DE-627)ELV004415906 volume:236 year:2013 day:15 month:12 pages:557-567 extent:11 https://doi.org/10.1016/j.surfcoat.2013.10.066 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 58.51 Abwassertechnik Wasseraufbereitung VZ AR 236 2013 15 1215 557-567 11 045F 620 |
| allfieldsSound |
10.1016/j.surfcoat.2013.10.066 doi GBVA2013007000030.pica (DE-627)ELV016755308 (ELSEVIER)S0257-8972(13)01000-1 DE-627 ger DE-627 rakwb eng 620 670 620 DE-600 670 DE-600 570 690 VZ 58.51 bkl Dong, Shujuan verfasserin aut Multi-layered thermal barrier coatings fabricated by plasma-spraying and dry-ice blasting: Microstructure characterization and prolonged lifetime 2013transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The quality of bond coat and top coat of thermal barrier coatings (TBCs) has strong influences on their lifetime at high temperature. Especially, the oxygen content level and the surface roughness of bond coat as well as the porosity of top coat have been demonstrated to play an important role in the thermomechanical behavior of TBCs. In this study, dry-ice blasting was used during the preparation of TBCs which were composed of atmospheric plasma sprayed CoNiCrAlY bond coat and YSZ top coat. Three sets of TBCs deposited with different dry-ice (CO2) blasting treatments were compared with respect to the coating microstructure evolution, the growth behavior of thermally grown oxide (TGO), crack propagation and thermal shock resistance during thermal cycling exposure. It was interesting to find that different microstructures of bond coat and top coat were obtained under different spraying conditions. Moreover, the results showed that CoNiCrAlY bond coats continue to be oxidized during the deposition process of YSZ top coats when they are plasma-sprayed without dry-ice blasting. The three sets of prepared TBCs have different thermal shock lifetime. TBC with APS dry-ice blasted bond coat and APS dry-ice blasted top coat was the most durable and exhibited significant improvement in lifetime. The remarkable decrease in the oxide content and the porosity of bond coat, the increase in the “vertical” porosity of top coat and the improvement in the bonding strength at the bond coat/top coat interface appeared to contribute to the prolonged lifetime. The quality of bond coat and top coat of thermal barrier coatings (TBCs) has strong influences on their lifetime at high temperature. Especially, the oxygen content level and the surface roughness of bond coat as well as the porosity of top coat have been demonstrated to play an important role in the thermomechanical behavior of TBCs. In this study, dry-ice blasting was used during the preparation of TBCs which were composed of atmospheric plasma sprayed CoNiCrAlY bond coat and YSZ top coat. Three sets of TBCs deposited with different dry-ice (CO2) blasting treatments were compared with respect to the coating microstructure evolution, the growth behavior of thermally grown oxide (TGO), crack propagation and thermal shock resistance during thermal cycling exposure. It was interesting to find that different microstructures of bond coat and top coat were obtained under different spraying conditions. Moreover, the results showed that CoNiCrAlY bond coats continue to be oxidized during the deposition process of YSZ top coats when they are plasma-sprayed without dry-ice blasting. The three sets of prepared TBCs have different thermal shock lifetime. TBC with APS dry-ice blasted bond coat and APS dry-ice blasted top coat was the most durable and exhibited significant improvement in lifetime. The remarkable decrease in the oxide content and the porosity of bond coat, the increase in the “vertical” porosity of top coat and the improvement in the bonding strength at the bond coat/top coat interface appeared to contribute to the prolonged lifetime. Song, Bo oth Zhou, Genshu oth Hansz, Bernard oth Liao, Hanlin oth Coddet, Christian oth Enthalten in Elsevier Science Bai, Binglin ELSEVIER A high efficiency solar steam generation system with using residual heat to enhance steam escape 2020 Amsterdam [u.a.] (DE-627)ELV004415906 volume:236 year:2013 day:15 month:12 pages:557-567 extent:11 https://doi.org/10.1016/j.surfcoat.2013.10.066 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 58.51 Abwassertechnik Wasseraufbereitung VZ AR 236 2013 15 1215 557-567 11 045F 620 |
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Enthalten in A high efficiency solar steam generation system with using residual heat to enhance steam escape Amsterdam [u.a.] volume:236 year:2013 day:15 month:12 pages:557-567 extent:11 |
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A high efficiency solar steam generation system with using residual heat to enhance steam escape |
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multi-layered thermal barrier coatings fabricated by plasma-spraying and dry-ice blasting: microstructure characterization and prolonged lifetime |
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Multi-layered thermal barrier coatings fabricated by plasma-spraying and dry-ice blasting: Microstructure characterization and prolonged lifetime |
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The quality of bond coat and top coat of thermal barrier coatings (TBCs) has strong influences on their lifetime at high temperature. Especially, the oxygen content level and the surface roughness of bond coat as well as the porosity of top coat have been demonstrated to play an important role in the thermomechanical behavior of TBCs. In this study, dry-ice blasting was used during the preparation of TBCs which were composed of atmospheric plasma sprayed CoNiCrAlY bond coat and YSZ top coat. Three sets of TBCs deposited with different dry-ice (CO2) blasting treatments were compared with respect to the coating microstructure evolution, the growth behavior of thermally grown oxide (TGO), crack propagation and thermal shock resistance during thermal cycling exposure. It was interesting to find that different microstructures of bond coat and top coat were obtained under different spraying conditions. Moreover, the results showed that CoNiCrAlY bond coats continue to be oxidized during the deposition process of YSZ top coats when they are plasma-sprayed without dry-ice blasting. The three sets of prepared TBCs have different thermal shock lifetime. TBC with APS dry-ice blasted bond coat and APS dry-ice blasted top coat was the most durable and exhibited significant improvement in lifetime. The remarkable decrease in the oxide content and the porosity of bond coat, the increase in the “vertical” porosity of top coat and the improvement in the bonding strength at the bond coat/top coat interface appeared to contribute to the prolonged lifetime. |
| abstractGer |
The quality of bond coat and top coat of thermal barrier coatings (TBCs) has strong influences on their lifetime at high temperature. Especially, the oxygen content level and the surface roughness of bond coat as well as the porosity of top coat have been demonstrated to play an important role in the thermomechanical behavior of TBCs. In this study, dry-ice blasting was used during the preparation of TBCs which were composed of atmospheric plasma sprayed CoNiCrAlY bond coat and YSZ top coat. Three sets of TBCs deposited with different dry-ice (CO2) blasting treatments were compared with respect to the coating microstructure evolution, the growth behavior of thermally grown oxide (TGO), crack propagation and thermal shock resistance during thermal cycling exposure. It was interesting to find that different microstructures of bond coat and top coat were obtained under different spraying conditions. Moreover, the results showed that CoNiCrAlY bond coats continue to be oxidized during the deposition process of YSZ top coats when they are plasma-sprayed without dry-ice blasting. The three sets of prepared TBCs have different thermal shock lifetime. TBC with APS dry-ice blasted bond coat and APS dry-ice blasted top coat was the most durable and exhibited significant improvement in lifetime. The remarkable decrease in the oxide content and the porosity of bond coat, the increase in the “vertical” porosity of top coat and the improvement in the bonding strength at the bond coat/top coat interface appeared to contribute to the prolonged lifetime. |
| abstract_unstemmed |
The quality of bond coat and top coat of thermal barrier coatings (TBCs) has strong influences on their lifetime at high temperature. Especially, the oxygen content level and the surface roughness of bond coat as well as the porosity of top coat have been demonstrated to play an important role in the thermomechanical behavior of TBCs. In this study, dry-ice blasting was used during the preparation of TBCs which were composed of atmospheric plasma sprayed CoNiCrAlY bond coat and YSZ top coat. Three sets of TBCs deposited with different dry-ice (CO2) blasting treatments were compared with respect to the coating microstructure evolution, the growth behavior of thermally grown oxide (TGO), crack propagation and thermal shock resistance during thermal cycling exposure. It was interesting to find that different microstructures of bond coat and top coat were obtained under different spraying conditions. Moreover, the results showed that CoNiCrAlY bond coats continue to be oxidized during the deposition process of YSZ top coats when they are plasma-sprayed without dry-ice blasting. The three sets of prepared TBCs have different thermal shock lifetime. TBC with APS dry-ice blasted bond coat and APS dry-ice blasted top coat was the most durable and exhibited significant improvement in lifetime. The remarkable decrease in the oxide content and the porosity of bond coat, the increase in the “vertical” porosity of top coat and the improvement in the bonding strength at the bond coat/top coat interface appeared to contribute to the prolonged lifetime. |
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Multi-layered thermal barrier coatings fabricated by plasma-spraying and dry-ice blasting: Microstructure characterization and prolonged lifetime |
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