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

被引：35

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

页码：1041 / 1045

页数：5

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