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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 PublicationCERAMICS INTERNATIONAL
ISSN0272-8842
Volume45Issue:15Pages:19055
SubtypeArticle
AbstractSilicon 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.
KeywordSilicon nitride Fracture toughness Tungsten Nitrogen pressure
DOI10.1016/j.ceramint.2019.06.148
Language英语
WOS Research AreaMaterials Science
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://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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