硅酸盐学报2017，Vol.45Issue(7)：923-929,7.DOI:10.14062/j.issn.0454-5648.2017.07.05
添加TiB2对SiC基复相陶瓷显微结构和力学性能的影响
Influence of Adding TiB2 on Structure and Mechanical Properties of SiC-Based Composite Ceramics
黄安琪 1朱时珍 1刘玲 1马壮 1高丽红1
作者信息
- 1. 北京理工大学材料学院,冲击环境材料技术国家级重点实验室,北京 100081
- 折叠
摘要
Abstract
SiC–TiB2 composite ceramics were prepared by a spark plasma sintering technique using Y3Al5O12(YAG) as a sintering additive. The influences of SPS sintering temperature and addition of TiB2 on the microstructure, especially the microstructure of intergranular phases, as well as the mechanical properties of the ceramics were investigated by X-ray diffraction, scanning and transmission electron microscopy, and energy disperse spectroscopy, respectively. The results show that the addition of TiB2 has a negative effect on the densification, causes the intergranular phases transform from crystalline phase to amorphous phase, and increases the bonding strength between grains, thus improving the mechanical properties. The maximum flexural strength and the maximum fracture toughness of SiC–TiB2 ceramic are 753 MPa sintered at 1750 ℃ and 8.84 MPa·m1/2 sintered at 1700℃, respectively.关键词
碳化硅/二硼化钛/显微结构/放电等离子烧结/力学性能Key words
silicon carbide/titanium diboride/microstructure/spark plasma sintering/mechanical properties分类
化学工程引用本文复制引用
黄安琪,朱时珍,刘玲,马壮,高丽红..添加TiB2对SiC基复相陶瓷显微结构和力学性能的影响[J].硅酸盐学报,2017,45(7):923-929,7.
