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Simultaneously enhanced toughness and strain tolerance of SiC-based ceramic composite by in-situ formation of VB2particles
Li, Yinsheng1,2; Wu, Haibo1; Kim, Ha-Neul2; Liu, Xuejian1; Huang, Zhengren1
2017
Source PublicationJournal of the European Ceramic Society
ISSN09552219
Volume37Issue:1Pages:399-405
AbstractSiC-30vol%VB2ceramic composite was pressureless densified at 2150 °C with excess B4C and C as sintering aids after in-situ formation of VB2in SiC matrix. The sintered bulk gained a considerably high fracture toughness of 7.0 ± 0.4 MPa m1/2, which was ∼2.4 times as high as that of the monolithic SiC ceramic, owing to the existences of weak heterophase boundaries, thermal residual stresses and microcracks. Meanwhile, since the VB2particle has a lower elastic modulus than SiC and significantly suppressed the grain growth of SiC, the composite exhibited a high flexural strength of 458 ± 36 MPa and a relatively low Young's modulus of 356 ± 6 GPa, resulting in an increase of ∼59.3% in mechanical strain tolerance (1.29 × 10−3) compared with that of single-phase SiC ceramic. Besides, the residual stresses and microcracks also induced a lower-than-expected Vickers hardness of 20.8 ± 0.5 GPa in the composite. © 2016 Elsevier Ltd
DOI10.1016/j.jeurceramsoc.2016.07.017
EI Accession Number20163102667158
EI KeywordsFracture toughness
EI Classification Number804.2 Inorganic Compounds - 812.1 Ceramics - 933.1.2 Crystal Growth - 951 Materials Science
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25924
Collection中国科学院上海硅酸盐研究所
Affiliation1.Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
2.Korea Institute of Materials Science, Gyeongnam, Changwon; 51508, Korea, Republic of
Recommended Citation
GB/T 7714
Li, Yinsheng,Wu, Haibo,Kim, Ha-Neul,et al. Simultaneously enhanced toughness and strain tolerance of SiC-based ceramic composite by in-situ formation of VB2particles[J]. Journal of the European Ceramic Society,2017,37(1):399-405.
APA Li, Yinsheng,Wu, Haibo,Kim, Ha-Neul,Liu, Xuejian,&Huang, Zhengren.(2017).Simultaneously enhanced toughness and strain tolerance of SiC-based ceramic composite by in-situ formation of VB2particles.Journal of the European Ceramic Society,37(1),399-405.
MLA Li, Yinsheng,et al."Simultaneously enhanced toughness and strain tolerance of SiC-based ceramic composite by in-situ formation of VB2particles".Journal of the European Ceramic Society 37.1(2017):399-405.
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