Effect of SiC Content on Mechanical and Thermal Properties of ZTA and ATZ Composite Ceramics

• 作者: Chai Jianlong Cui Minghuan Guo Yawei Li Shufeng Shen Tielong Wang Zhiguang Yao Cunfeng Zhu Yabin
• 来源期刊: 中国科学院近代物理研究所和兰州重离子研究装置年报:英文版
• 学科: 工学
• 关键词: CERAMICS COMPOSITE CARBIDE
• 年，卷（期）: 2018,（1）
• 页码范围: 102-103
• 页数: 2页
• 分类号: TQ1

摘要

Oxide/carbide composite ceramics were prepared by spark plasma sintering(SPS)usingα-Al2O3,ZrO2andβ-SiC powders as raw materials.The effects of SiC doping on the microstructure,mechanical and thermal properties of zirconia toughened alumina(ZTA)and alumina toughened zirconia(ATZ)based composites were investigated.Fig.1 shows the effect of SiC content on the mechanical properties of the complex phase ceramics.With the increase of SiC content,the bending strength of SiC-ATZ80mol%composite phase ceramics decreased from 992 to 761 MPa.The reason is that the thermal expansion mismatch between the SiC and the substrate induces thermal stress,resulting in the different shrinkage between the substrate and the SiC affecting its strength.