Densification, microstructure and mechanical properties of SiO2-cBN composites by spark plasma sintering

被引：30
作者：
Zhang, Jianfeng [1 ]
Tu, Rong [1 ]
Goto, Takashi [1 ]
机构：
[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
来源：
CERAMICS INTERNATIONAL | 2012年 / 38卷 / 01期
基金：
日本学术振兴会;
关键词：
Mechanical properties; Cubic boron nitride; Silicon oxide; Spark plasma sintering; Phase transformation; CUBIC BN COMPOSITES; PARTICLE-SIZE; INDENTATION FRACTURE; PHASE-TRANSFORMATION; HARDNESS; POWDER; SILICA; GLASS;
D O I：
10.1016/j.ceramint.2011.07.013
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
SiO2-cBN composites were consolidated by spark plasma sintering at 1473-1973 K. The effects of cBN content and sintering temperature on the relative density, phase transformation, microstructure and mechanical properties of the SiO2-cBN composites were investigated. The relative density of the SiO2-cBN composites increased with increasing SiO2 content. The phase transformation of cBN to hBN in SiO2 cBN composites was identified at 1973 K, showing the highest transformation temperature in cBN-containing composites. The SiO2-20 vol% cBN composites sintered at 1673 K showed the highest hardness and fracture toughness of 12.5 GPa and 1.5 MPa m(1/2), respectively. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：351 / 356
页数：6
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