Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10629244 | Journal of the European Ceramic Society | 2016 | 6 Pages |
Abstract
In an effort to enhance the application in a cryogenic serving environment, the mechanical properties of Si3N4-SiCw composites measured at different temperatures are investigated for the first time. The temperature-dependent increase in flexural strength is accompanied by a substantial increase in fracture toughness with the temperature decrease from 293Â K to 77Â K. The fracture toughness of Si3N4-SiCw composites measured at 77Â K increases obviously, which is â¼41% higher than that at 293Â K. Also, the effect of residual stress on the toughness and fracture mode is discussed by the theoretical calculation and analysis. At cryogenic temperatures, the toughnening effect of SiC whiskers is increased, and Si3N4-SiCw composites could be a promising material for applications in cryogenic environments.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Weiwei Wu, Jingya Gui, Sai Wei, Weijiang Xue, Zhipeng Xie,