Microstructure and Mechanical Properties of Hot Pressed ZrC-SiC-ZrB2 Composites

摘要：

　　Ternary ZrC-SiC-ZrB2 ceramic composites were prepared by hot pressing at 1900 ℃ for 60 min under a pressure of 30 MPa in argon.The influence of ZrB2 content on the microstructure and mechanical properties of ZrC-SiC-ZrB2 composites was investigated.Examination of SEM showed that the microstructure of the composites consisted of the equiaxed ZrB2,ZrC and SiC grains,and there was a slight tendency of reduction for grain size in ZrC with increasing ZrB2 content.The hardness increased considerably from 23.3 GPa for the ZS material to 26.4 GPa for the ZS20B material.Flexural strength was a strong function of ZrB2 content,increasing from 407 MPa without ZrB2 addition to 627 MPa when the ZrB2 content was 20vol.%.However,the addition of ZrB2 has little influence on the fracture toughness,ranging between 5.5 and 5.7 MPam1/2.

关键词： ZrC Ceramic Microstructure Mechanical properties

作者: Baoxia Ma Wenbo Han Xinghong Zhang

作者单位: Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China;Department of M Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China

会议类型: 国际会议

会议名称: The Sixth China International Conference on High-Performance Ceramics(第六届中国先进陶瓷国际研讨会(CICC-6))

会议地点: 哈尔滨

会议语种:英文

页码: 173-177

在线出版日期: 2009-08-16（万方平台首次上网日期，不代表论文的发表时间）