Densification mechanism of Zr-based bulk metallic glass prepared by two-step spark plasma sintering
In this work, a two-step spark plasma sintering process for amorphous alloys was proposed. Densification mechanisms and the effects of the pretreatment process on the microstructure and mechanical properties were studied. The results show that the two-step spark plasma sintering process could signif...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Ding, Huaping [verfasserIn] Zhao, Zhankui [verfasserIn] Jin, Junsong [verfasserIn] Deng, Lei [verfasserIn] Gong, Pan [verfasserIn] Wang, Xinyun [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2020 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Journal of alloys and compounds - Lausanne : Elsevier, 1991, 850 |
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| Übergeordnetes Werk: |
volume:850 |
| DOI / URN: |
10.1016/j.jallcom.2020.156724 |
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| Katalog-ID: |
ELV004696956 |
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| 245 | 1 | 0 | |a Densification mechanism of Zr-based bulk metallic glass prepared by two-step spark plasma sintering |
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| 520 | |a In this work, a two-step spark plasma sintering process for amorphous alloys was proposed. Densification mechanisms and the effects of the pretreatment process on the microstructure and mechanical properties were studied. The results show that the two-step spark plasma sintering process could significantly improve the density and fracture strength of sintered samples and even reduce the final sintering temperature. The lower-temperature pretreatment process resulted in higher density and more uniform density distribution of the powder billets, which reduced the temperature gap between inside of the powder particles and the contacts, as well as reducing the electrical resistivity of the powder billets. Starting from highly homogeneously packed powder billets, more current flowed to the powders, promoting the discharge effect and internal Joule heat generation. The pre-treated high-quality powder billets enhanced the sintering process, which enabled the realization of a high strength and reduced sintering temperature. | ||
| 650 | 4 | |a Metallic glass | |
| 650 | 4 | |a Two-step spark plasma sintering | |
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| 700 | 1 | |a Zhao, Zhankui |e verfasserin |4 aut | |
| 700 | 1 | |a Jin, Junsong |e verfasserin |4 aut | |
| 700 | 1 | |a Deng, Lei |e verfasserin |4 aut | |
| 700 | 1 | |a Gong, Pan |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Xinyun |e verfasserin |4 aut | |
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10.1016/j.jallcom.2020.156724 doi (DE-627)ELV004696956 (ELSEVIER)S0925-8388(20)33088-7 DE-627 ger DE-627 rda eng 670 540 DE-600 51.54 bkl 33.61 bkl 35.90 bkl Ding, Huaping verfasserin aut Densification mechanism of Zr-based bulk metallic glass prepared by two-step spark plasma sintering 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this work, a two-step spark plasma sintering process for amorphous alloys was proposed. Densification mechanisms and the effects of the pretreatment process on the microstructure and mechanical properties were studied. The results show that the two-step spark plasma sintering process could significantly improve the density and fracture strength of sintered samples and even reduce the final sintering temperature. The lower-temperature pretreatment process resulted in higher density and more uniform density distribution of the powder billets, which reduced the temperature gap between inside of the powder particles and the contacts, as well as reducing the electrical resistivity of the powder billets. Starting from highly homogeneously packed powder billets, more current flowed to the powders, promoting the discharge effect and internal Joule heat generation. The pre-treated high-quality powder billets enhanced the sintering process, which enabled the realization of a high strength and reduced sintering temperature. Metallic glass Two-step spark plasma sintering Electrical resistivity Local bridge Zhao, Zhankui verfasserin aut Jin, Junsong verfasserin aut Deng, Lei verfasserin aut Gong, Pan verfasserin aut Wang, Xinyun verfasserin aut Enthalten in Journal of alloys and compounds Lausanne : Elsevier, 1991 850 Online-Ressource (DE-627)320504646 (DE-600)2012675-X (DE-576)098615009 nnns volume:850 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2008 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.54 Nichteisenmetalle und ihre Legierungen 33.61 Festkörperphysik 35.90 Festkörperchemie AR 850 |
| spelling |
10.1016/j.jallcom.2020.156724 doi (DE-627)ELV004696956 (ELSEVIER)S0925-8388(20)33088-7 DE-627 ger DE-627 rda eng 670 540 DE-600 51.54 bkl 33.61 bkl 35.90 bkl Ding, Huaping verfasserin aut Densification mechanism of Zr-based bulk metallic glass prepared by two-step spark plasma sintering 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this work, a two-step spark plasma sintering process for amorphous alloys was proposed. Densification mechanisms and the effects of the pretreatment process on the microstructure and mechanical properties were studied. The results show that the two-step spark plasma sintering process could significantly improve the density and fracture strength of sintered samples and even reduce the final sintering temperature. The lower-temperature pretreatment process resulted in higher density and more uniform density distribution of the powder billets, which reduced the temperature gap between inside of the powder particles and the contacts, as well as reducing the electrical resistivity of the powder billets. Starting from highly homogeneously packed powder billets, more current flowed to the powders, promoting the discharge effect and internal Joule heat generation. The pre-treated high-quality powder billets enhanced the sintering process, which enabled the realization of a high strength and reduced sintering temperature. Metallic glass Two-step spark plasma sintering Electrical resistivity Local bridge Zhao, Zhankui verfasserin aut Jin, Junsong verfasserin aut Deng, Lei verfasserin aut Gong, Pan verfasserin aut Wang, Xinyun verfasserin aut Enthalten in Journal of alloys and compounds Lausanne : Elsevier, 1991 850 Online-Ressource (DE-627)320504646 (DE-600)2012675-X (DE-576)098615009 nnns volume:850 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2008 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.54 Nichteisenmetalle und ihre Legierungen 33.61 Festkörperphysik 35.90 Festkörperchemie AR 850 |
| allfields_unstemmed |
10.1016/j.jallcom.2020.156724 doi (DE-627)ELV004696956 (ELSEVIER)S0925-8388(20)33088-7 DE-627 ger DE-627 rda eng 670 540 DE-600 51.54 bkl 33.61 bkl 35.90 bkl Ding, Huaping verfasserin aut Densification mechanism of Zr-based bulk metallic glass prepared by two-step spark plasma sintering 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this work, a two-step spark plasma sintering process for amorphous alloys was proposed. Densification mechanisms and the effects of the pretreatment process on the microstructure and mechanical properties were studied. The results show that the two-step spark plasma sintering process could significantly improve the density and fracture strength of sintered samples and even reduce the final sintering temperature. The lower-temperature pretreatment process resulted in higher density and more uniform density distribution of the powder billets, which reduced the temperature gap between inside of the powder particles and the contacts, as well as reducing the electrical resistivity of the powder billets. Starting from highly homogeneously packed powder billets, more current flowed to the powders, promoting the discharge effect and internal Joule heat generation. The pre-treated high-quality powder billets enhanced the sintering process, which enabled the realization of a high strength and reduced sintering temperature. Metallic glass Two-step spark plasma sintering Electrical resistivity Local bridge Zhao, Zhankui verfasserin aut Jin, Junsong verfasserin aut Deng, Lei verfasserin aut Gong, Pan verfasserin aut Wang, Xinyun verfasserin aut Enthalten in Journal of alloys and compounds Lausanne : Elsevier, 1991 850 Online-Ressource (DE-627)320504646 (DE-600)2012675-X (DE-576)098615009 nnns volume:850 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2008 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.54 Nichteisenmetalle und ihre Legierungen 33.61 Festkörperphysik 35.90 Festkörperchemie AR 850 |
| allfieldsGer |
10.1016/j.jallcom.2020.156724 doi (DE-627)ELV004696956 (ELSEVIER)S0925-8388(20)33088-7 DE-627 ger DE-627 rda eng 670 540 DE-600 51.54 bkl 33.61 bkl 35.90 bkl Ding, Huaping verfasserin aut Densification mechanism of Zr-based bulk metallic glass prepared by two-step spark plasma sintering 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this work, a two-step spark plasma sintering process for amorphous alloys was proposed. Densification mechanisms and the effects of the pretreatment process on the microstructure and mechanical properties were studied. The results show that the two-step spark plasma sintering process could significantly improve the density and fracture strength of sintered samples and even reduce the final sintering temperature. The lower-temperature pretreatment process resulted in higher density and more uniform density distribution of the powder billets, which reduced the temperature gap between inside of the powder particles and the contacts, as well as reducing the electrical resistivity of the powder billets. Starting from highly homogeneously packed powder billets, more current flowed to the powders, promoting the discharge effect and internal Joule heat generation. The pre-treated high-quality powder billets enhanced the sintering process, which enabled the realization of a high strength and reduced sintering temperature. Metallic glass Two-step spark plasma sintering Electrical resistivity Local bridge Zhao, Zhankui verfasserin aut Jin, Junsong verfasserin aut Deng, Lei verfasserin aut Gong, Pan verfasserin aut Wang, Xinyun verfasserin aut Enthalten in Journal of alloys and compounds Lausanne : Elsevier, 1991 850 Online-Ressource (DE-627)320504646 (DE-600)2012675-X (DE-576)098615009 nnns volume:850 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2008 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.54 Nichteisenmetalle und ihre Legierungen 33.61 Festkörperphysik 35.90 Festkörperchemie AR 850 |
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10.1016/j.jallcom.2020.156724 doi (DE-627)ELV004696956 (ELSEVIER)S0925-8388(20)33088-7 DE-627 ger DE-627 rda eng 670 540 DE-600 51.54 bkl 33.61 bkl 35.90 bkl Ding, Huaping verfasserin aut Densification mechanism of Zr-based bulk metallic glass prepared by two-step spark plasma sintering 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this work, a two-step spark plasma sintering process for amorphous alloys was proposed. Densification mechanisms and the effects of the pretreatment process on the microstructure and mechanical properties were studied. The results show that the two-step spark plasma sintering process could significantly improve the density and fracture strength of sintered samples and even reduce the final sintering temperature. The lower-temperature pretreatment process resulted in higher density and more uniform density distribution of the powder billets, which reduced the temperature gap between inside of the powder particles and the contacts, as well as reducing the electrical resistivity of the powder billets. Starting from highly homogeneously packed powder billets, more current flowed to the powders, promoting the discharge effect and internal Joule heat generation. The pre-treated high-quality powder billets enhanced the sintering process, which enabled the realization of a high strength and reduced sintering temperature. Metallic glass Two-step spark plasma sintering Electrical resistivity Local bridge Zhao, Zhankui verfasserin aut Jin, Junsong verfasserin aut Deng, Lei verfasserin aut Gong, Pan verfasserin aut Wang, Xinyun verfasserin aut Enthalten in Journal of alloys and compounds Lausanne : Elsevier, 1991 850 Online-Ressource (DE-627)320504646 (DE-600)2012675-X (DE-576)098615009 nnns volume:850 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2008 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.54 Nichteisenmetalle und ihre Legierungen 33.61 Festkörperphysik 35.90 Festkörperchemie AR 850 |
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Densification mechanism of Zr-based bulk metallic glass prepared by two-step spark plasma sintering |
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Densification mechanism of Zr-based bulk metallic glass prepared by two-step spark plasma sintering |
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Ding, Huaping |
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densification mechanism of zr-based bulk metallic glass prepared by two-step spark plasma sintering |
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Densification mechanism of Zr-based bulk metallic glass prepared by two-step spark plasma sintering |
| abstract |
In this work, a two-step spark plasma sintering process for amorphous alloys was proposed. Densification mechanisms and the effects of the pretreatment process on the microstructure and mechanical properties were studied. The results show that the two-step spark plasma sintering process could significantly improve the density and fracture strength of sintered samples and even reduce the final sintering temperature. The lower-temperature pretreatment process resulted in higher density and more uniform density distribution of the powder billets, which reduced the temperature gap between inside of the powder particles and the contacts, as well as reducing the electrical resistivity of the powder billets. Starting from highly homogeneously packed powder billets, more current flowed to the powders, promoting the discharge effect and internal Joule heat generation. The pre-treated high-quality powder billets enhanced the sintering process, which enabled the realization of a high strength and reduced sintering temperature. |
| abstractGer |
In this work, a two-step spark plasma sintering process for amorphous alloys was proposed. Densification mechanisms and the effects of the pretreatment process on the microstructure and mechanical properties were studied. The results show that the two-step spark plasma sintering process could significantly improve the density and fracture strength of sintered samples and even reduce the final sintering temperature. The lower-temperature pretreatment process resulted in higher density and more uniform density distribution of the powder billets, which reduced the temperature gap between inside of the powder particles and the contacts, as well as reducing the electrical resistivity of the powder billets. Starting from highly homogeneously packed powder billets, more current flowed to the powders, promoting the discharge effect and internal Joule heat generation. The pre-treated high-quality powder billets enhanced the sintering process, which enabled the realization of a high strength and reduced sintering temperature. |
| abstract_unstemmed |
In this work, a two-step spark plasma sintering process for amorphous alloys was proposed. Densification mechanisms and the effects of the pretreatment process on the microstructure and mechanical properties were studied. The results show that the two-step spark plasma sintering process could significantly improve the density and fracture strength of sintered samples and even reduce the final sintering temperature. The lower-temperature pretreatment process resulted in higher density and more uniform density distribution of the powder billets, which reduced the temperature gap between inside of the powder particles and the contacts, as well as reducing the electrical resistivity of the powder billets. Starting from highly homogeneously packed powder billets, more current flowed to the powders, promoting the discharge effect and internal Joule heat generation. The pre-treated high-quality powder billets enhanced the sintering process, which enabled the realization of a high strength and reduced sintering temperature. |
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