Influence of annealing treatments on microstructure and toughness of liquid-phase-sintered silicon carbide

Abstract The possibility of an in situ toughening through the β → α phase transition was evaluated on liquid-phase-sintered SiC (with $ Al_{2} %$ O_{3} $ and $ Y_{2} %$ O_{3} $ as additives). Dense hot-pressed materials with an equiaxed morphology were annealed at 1850, 1900 and 1950 °C for 1 to 4 h...
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Gespeichert in:

Autor*in:	Sciti, D. [verfasserIn] Bellosi, A. [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2001

Übergeordnetes Werk:	Enthalten in: Journal of materials research - Berlin : Springer, 1986, 16(2001), 3 vom: 01. März, Seite 806-816
Übergeordnetes Werk:	volume:16 ; year:2001 ; number:3 ; day:01 ; month:03 ; pages:806-816

Links:	Volltext

DOI / URN:	10.1557/JMR.2001.0126

Katalog-ID:	SPR042256682

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spelling	10.1557/JMR.2001.0126 doi (DE-627)SPR042256682 (DE-599)SPRJMR.2001.0126-e (SPR)JMR.2001.0126-e DE-627 ger DE-627 rakwb eng 670 ASE 51.00 bkl Sciti, D. verfasserin aut Influence of annealing treatments on microstructure and toughness of liquid-phase-sintered silicon carbide 2001 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract The possibility of an in situ toughening through the β → α phase transition was evaluated on liquid-phase-sintered SiC (with $ Al_{2} %$ O_{3} $ and $ Y_{2} %$ O_{3} $ as additives). Dense hot-pressed materials with an equiaxed morphology were annealed at 1850, 1900 and 1950 °C for 1 to 4 h so the effect of time, temperature, composition, and amount of second phase could be investigated. Microstructure features revealed that 1900 °C was the best temperature in producing a high percentage of elongated grains with limited grain coarsening and reduction of second-phase pockets. Mean grain size and aspect ratios increased from 0.5 to 1.5 μm and to 5, respectively, during the first 2 h of treatment at 1900 °C and then maintained a constant value. The amount and composition of second phase influenced the rate of transformation from equiaxed to elongated grain morphology. Toughness increased from 3.3 to 5.5 Mpa · $ m^{1/2} $ in 1900 °C annealed samples due to a crack-deflection mechanism. Bellosi, A. verfasserin aut Enthalten in Journal of materials research Berlin : Springer, 1986 16(2001), 3 vom: 01. März, Seite 806-816 (DE-627)320527026 (DE-600)2015297-8 2044-5326 nnns volume:16 year:2001 number:3 day:01 month:03 pages:806-816 https://dx.doi.org/10.1557/JMR.2001.0126 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_24 GBV_ILN_31 GBV_ILN_70 GBV_ILN_120 GBV_ILN_293 GBV_ILN_374 GBV_ILN_702 GBV_ILN_2005 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_4126 51.00 ASE AR 16 2001 3 01 03 806-816
allfields_unstemmed	10.1557/JMR.2001.0126 doi (DE-627)SPR042256682 (DE-599)SPRJMR.2001.0126-e (SPR)JMR.2001.0126-e DE-627 ger DE-627 rakwb eng 670 ASE 51.00 bkl Sciti, D. verfasserin aut Influence of annealing treatments on microstructure and toughness of liquid-phase-sintered silicon carbide 2001 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract The possibility of an in situ toughening through the β → α phase transition was evaluated on liquid-phase-sintered SiC (with $ Al_{2} %$ O_{3} $ and $ Y_{2} %$ O_{3} $ as additives). Dense hot-pressed materials with an equiaxed morphology were annealed at 1850, 1900 and 1950 °C for 1 to 4 h so the effect of time, temperature, composition, and amount of second phase could be investigated. Microstructure features revealed that 1900 °C was the best temperature in producing a high percentage of elongated grains with limited grain coarsening and reduction of second-phase pockets. Mean grain size and aspect ratios increased from 0.5 to 1.5 μm and to 5, respectively, during the first 2 h of treatment at 1900 °C and then maintained a constant value. The amount and composition of second phase influenced the rate of transformation from equiaxed to elongated grain morphology. Toughness increased from 3.3 to 5.5 Mpa · $ m^{1/2} $ in 1900 °C annealed samples due to a crack-deflection mechanism. Bellosi, A. verfasserin aut Enthalten in Journal of materials research Berlin : Springer, 1986 16(2001), 3 vom: 01. März, Seite 806-816 (DE-627)320527026 (DE-600)2015297-8 2044-5326 nnns volume:16 year:2001 number:3 day:01 month:03 pages:806-816 https://dx.doi.org/10.1557/JMR.2001.0126 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_24 GBV_ILN_31 GBV_ILN_70 GBV_ILN_120 GBV_ILN_293 GBV_ILN_374 GBV_ILN_702 GBV_ILN_2005 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_4126 51.00 ASE AR 16 2001 3 01 03 806-816
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title_sort	influence of annealing treatments on microstructure and toughness of liquid-phase-sintered silicon carbide
title_auth	Influence of annealing treatments on microstructure and toughness of liquid-phase-sintered silicon carbide
abstract	Abstract The possibility of an in situ toughening through the β → α phase transition was evaluated on liquid-phase-sintered SiC (with $ Al_{2} %$ O_{3} $ and $ Y_{2} %$ O_{3} $ as additives). Dense hot-pressed materials with an equiaxed morphology were annealed at 1850, 1900 and 1950 °C for 1 to 4 h so the effect of time, temperature, composition, and amount of second phase could be investigated. Microstructure features revealed that 1900 °C was the best temperature in producing a high percentage of elongated grains with limited grain coarsening and reduction of second-phase pockets. Mean grain size and aspect ratios increased from 0.5 to 1.5 μm and to 5, respectively, during the first 2 h of treatment at 1900 °C and then maintained a constant value. The amount and composition of second phase influenced the rate of transformation from equiaxed to elongated grain morphology. Toughness increased from 3.3 to 5.5 Mpa · $ m^{1/2} $ in 1900 °C annealed samples due to a crack-deflection mechanism.
abstractGer	Abstract The possibility of an in situ toughening through the β → α phase transition was evaluated on liquid-phase-sintered SiC (with $ Al_{2} %$ O_{3} $ and $ Y_{2} %$ O_{3} $ as additives). Dense hot-pressed materials with an equiaxed morphology were annealed at 1850, 1900 and 1950 °C for 1 to 4 h so the effect of time, temperature, composition, and amount of second phase could be investigated. Microstructure features revealed that 1900 °C was the best temperature in producing a high percentage of elongated grains with limited grain coarsening and reduction of second-phase pockets. Mean grain size and aspect ratios increased from 0.5 to 1.5 μm and to 5, respectively, during the first 2 h of treatment at 1900 °C and then maintained a constant value. The amount and composition of second phase influenced the rate of transformation from equiaxed to elongated grain morphology. Toughness increased from 3.3 to 5.5 Mpa · $ m^{1/2} $ in 1900 °C annealed samples due to a crack-deflection mechanism.
abstract_unstemmed	Abstract The possibility of an in situ toughening through the β → α phase transition was evaluated on liquid-phase-sintered SiC (with $ Al_{2} %$ O_{3} $ and $ Y_{2} %$ O_{3} $ as additives). Dense hot-pressed materials with an equiaxed morphology were annealed at 1850, 1900 and 1950 °C for 1 to 4 h so the effect of time, temperature, composition, and amount of second phase could be investigated. Microstructure features revealed that 1900 °C was the best temperature in producing a high percentage of elongated grains with limited grain coarsening and reduction of second-phase pockets. Mean grain size and aspect ratios increased from 0.5 to 1.5 μm and to 5, respectively, during the first 2 h of treatment at 1900 °C and then maintained a constant value. The amount and composition of second phase influenced the rate of transformation from equiaxed to elongated grain morphology. Toughness increased from 3.3 to 5.5 Mpa · $ m^{1/2} $ in 1900 °C annealed samples due to a crack-deflection mechanism.
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title_short	Influence of annealing treatments on microstructure and toughness of liquid-phase-sintered silicon carbide
url	https://dx.doi.org/10.1557/JMR.2001.0126
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author2	Bellosi, A.
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doi_str	10.1557/JMR.2001.0126
up_date	2024-07-04T01:26:20.994Z
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Influence of annealing treatments on microstructure and toughness of liquid-phase-sintered silicon carbide

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