High tough W-added silicon nitride ceramics

doi:10.1016/j.ceramint.2019.06.148

SIC OpenIR

	High tough W-added silicon nitride ceramics
	Wang, Lujie; Qi, Qian; Zhang, Hui; Yang, Xiao; Liu, Zehua; Ge, Sheng; Peng, Xinglin; Liu, Xuejian; Huang, Zhengren
	2019-10-15
Source Publication	CERAMICS INTERNATIONAL
ISSN	0272-8842
Volume	45 Issue:15 Pages:19055
Subtype	Article
Abstract	Silicon nitride ceramics with varying amounts of tungsten were fabricated by sintering with various nitrogen pressure using yttria and alumina as sintering aids. It has been found that the chemical composition of the ceramics is sensitive to the nitrogen pressure during the sintering process, and the adverse interfacial reactions between W and Si3N4 could be perfectly inhibited by altering nitrogen pressure. The weak interfacial bonding strength between the tungsten particle and silicon nitride matrix dramatically promotes crack deflection, branch and grain pullout during the fracture process. As a consequence, with increasing W fraction, the fracture toughness of silicon nitride ceramics increases noticeably. Nevertheless, excessive W fraction lowers the relative density and degrades the performance of the ceramics. The silicon nitride ceramics with high fracture toughness about 11 MPa m(1/2) and high flexural strength about 1 GPa were fabricated.
Keyword	Silicon nitride Fracture toughness Tungsten Nitrogen pressure
DOI	10.1016/j.ceramint.2019.06.148
Language	英语
WOS Research Area	Materials Science
Publisher	ELSEVIER SCI LTD
Citation statistics	Cited Times:2[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/26774
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Wang, Lujie,Qi, Qian,Zhang, Hui,et al. High tough W-added silicon nitride ceramics[J]. CERAMICS INTERNATIONAL,2019,45(15):19055.
APA	Wang, Lujie.,Qi, Qian.,Zhang, Hui.,Yang, Xiao.,Liu, Zehua.,...&Huang, Zhengren.(2019).High tough W-added silicon nitride ceramics.CERAMICS INTERNATIONAL,45(15),19055.
MLA	Wang, Lujie,et al."High tough W-added silicon nitride ceramics".CERAMICS INTERNATIONAL 45.15(2019):19055.

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