Effects of W Element on the Microstructure of MoSi<sub>2</sub> Alloy

Zhao Jipeng; Shao Songwei; Chen Jiaoxian

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Effects of W Element on the Microstructure of MoSi₂ Alloy
Vol. 31, Issue 6, Pages: 504-506(2011)
Published： 2011 ，
DOI：

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[1]赵吉鹏,邵松伟,陈交贤.W的添加对MoSi_2显微组织的影响[J].特种铸造及有色合金,2011,31(06):504-506.

Zhao Jipeng, Shao Songwei, Chen Jiaoxian. Effects of W Element on the Microstructure of MoSi₂ Alloy. [J]. Special Casting & Nonferrous Alloys 31(6):504-506(2011)
[1]赵吉鹏,邵松伟,陈交贤.W的添加对MoSi_2显微组织的影响[J].特种铸造及有色合金,2011,31(06):504-506. DOI：

Zhao Jipeng, Shao Songwei, Chen Jiaoxian. Effects of W Element on the Microstructure of MoSi₂ Alloy. [J]. Special Casting & Nonferrous Alloys 31(6):504-506(2011) DOI：

摘要

以Mo、W、Si粉为原料

采用机械活化结合热压烧结的方法制备了不同W含量的MoSi2合金试样。结果表明

合金元素W加入后

其主要物相为MoSi2、（Mo

W）Si2固溶体及少量Mo4.8Si3C0.6碳化物

引起MoSi2显微应变增大

晶粒尺寸减小

从而细化了晶粒

晶粒尺寸在59.7

8.6nm之间

具有纳米晶结构

强化了基体;随着W含量的增多

MoSi2合金材料的晶格参数和晶格体积增大

晶格密度减小。

Abstract

MoSi2 alloy samples contained various W were prepared with Mo

W and Si powder as raw materials by mechanical activation combining with hot pressing sintering technology. The microstructure of the MoSi2 alloy was observed by OM （optical microscope） and SEM （scanning electron microscope）. The results show that the MoSi2 alloy containing W element is mainly composed of MoSi2 phase

（Mo

W）Si2 solid solution phase and a little Mo4.8Si3C0.6 phase. With W addition

grain size is refined in range of 59.7

8.6 nm which exhibits nano-crystalline structure as a result of causing the increase of micro-strain of MoSi2 and the decrease of grain size and the matrix is strengthened. With increasing in W addition

lattice constant and lattice volume are increased in the MoSi2 alloy with the decrease of the density.