High tough W-added silicon nitride ceramics

doi:10.1016/j.ceramint.2019.06.148

	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
刊名	CERAMICS INTERNATIONAL
	2019-10-15
卷号	45 期号:15 页码:19055
关键词	Silicon nitride Fracture toughness Tungsten Nitrogen pressure
ISSN号	0272-8842
DOI	10.1016/j.ceramint.2019.06.148
文献子类	Article
英文摘要	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.
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/26774]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 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.