Mechanical and electrical properties of MoSi2-based ceramics with various ZrB2-20 vol% SiC as additives for ultra high temperature heating element

被引：31
作者：
He, Rujie [1 ,2 ]
Tong, Zongwei [1 ,3 ]
Zhang, Keqiang [1 ,3 ]
Fang, Daining [1 ,2 ]
机构：
[1] Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China
[2] Beijing Inst Technol, Beijing Key Lab Lightweight Multifunct Composite, Beijing 100081, Peoples R China
[3] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2018年 / 44卷 / 01期
基金：
美国国家科学基金会;
关键词：
Molybdenum disilicide; Microstructure; Topological transformation; Mechanical property; Electrical property; MOSI2-SIC COMPOSITE; MICROSTRUCTURE; RESISTIVITY;
D O I：
10.1016/j.ceramint.2017.10.043
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：
MoSi2-(ZrB2-20 vol% SiC) ceramics were produced by pressureless sintering at 1700-1900 degrees C for 1 h. The amounts of ZrB2-20 vol% SiC were in the range of 0-80 vol%. Synergetic effects of ZrB2 and SiC additives on flexure strength of MoSi2 based ceramics were investigated in detail. A maximum strength of 279 +/- 20 MPa was examined for the ceramic with 20 vol% (ZrB2-20 vol% SiC). The electrical resistivity of the ceramics decreased with the volume fraction of (ZrB2-20 vol% SiC) increasing. Microstructure analysis and topological transformation calculations were carried out, which further proved the flexure strength and electrical resistivity measurement results.
引用
收藏
页码：1041 / 1045
页数：5
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