Friction and wear behavior of in-situ MoSi<sub>2</sub> and its composites by SPS

HU Qiaodan1; YAN Youwei2; LI Jianguo1

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Friction and wear behavior of in-situ MoSi₂ and its composites by SPS
Issue S1, Pages: 302-305(2008)
Published： 2008 ，
DOI：

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[1]胡侨丹,严有为,李建国.原位合成MoSi_2及其复合材料的摩擦磨损行为[J].特种铸造及有色合金,2008(S1):302-305.

HU Qiaodan1, YAN Youwei2, LI Jianguo1. Friction and wear behavior of in-situ MoSi₂ and its composites by SPS. [J]. Special Casting & Nonferrous Alloys (S1):302-305(2008)
[1]胡侨丹,严有为,李建国.原位合成MoSi_2及其复合材料的摩擦磨损行为[J].特种铸造及有色合金,2008(S1):302-305. DOI：

HU Qiaodan1, YAN Youwei2, LI Jianguo1. Friction and wear behavior of in-situ MoSi₂ and its composites by SPS. [J]. Special Casting & Nonferrous Alloys (S1):302-305(2008) DOI：

摘要

以Mo、Si和C粉末为对象

利用SPS技术合成致密的MoSi2和MoSi2-SiC复合材料。着重研究了MoSi2及其复合材料的摩擦磨损行为。结果表明

随着载荷的增加

合成材料的摩擦因数减小

磨损率在150N达到最小值;SiC含量的增加

使得材料磨损率逐渐减小

耐磨性优于单一的MoSi2材料;MoSi2的主要磨损机制为粘着、轻微氧化疲劳磨损

而粘附转移、疲劳磨损和犁削磨损是MoSi2-SiC复合材料磨损的主要机制。

Abstract

Using Mo

and C element powders as starting materials

a spark plasma sintering （SPS） was employed to synthesize high-density MoSi2 and MoSi2-SiC composite. Friction and wear behavior of MoSi2 and MoSi2-SiC composite were investigated. The results show that with increasing of loads

friction coefficient of the synthesized materials decreased and wear rate got minimum value with load being 150 N. Addition of SiC

the wear rate of MoSi2-SiC composites reduced gradually and the wear resistance of the composites was better than that of single MoSi2. The study of wear mechanism shows that adhesions

slight oxidation and fatigue are coactively caused the worn of MoSi2. However

those are mainly oxidation

shifting and tearing off of friction layer for MoSi2-SiC composite.