Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第26卷    第11期    总第212期    2016年11月

[PDF全文下载]    [Flash在线阅读]    [HTML全文阅读]

    

文章编号:1004-0609(2016)-11-2296-07
放电等离子烧结MoSi2陶瓷的微观结构与力学性能
李 恒1,郝安林2,王雅雷1,熊 翔1,陈招科1,孙 威1,韩欣欣1

(1. 中南大学 粉末冶金国家重点实验室,长沙 410083;2. 安阳工学院,安阳 455000)

摘 要: 以微米级MoSi2粉末为原料,利用放电等离子烧结技术制备致密度达99%的MoSi2陶瓷材料。研究烧结温度对MoSi2陶瓷的致密化、微观结构和力学性能的影响。结果表明:SPS烧结技术制备的MoSi2陶瓷由MoSi2、少量的Mo5Si3和SiO2组成;随着烧结温度的升高,材料的致密化效果明显加强;当烧结温度为1600 ℃时,材料的综合性能最优,相对密度和抗弯强度达到98.9%和417 MPa。但当烧结温度达到1800 ℃时,致密度基本保持不变,MoSi2晶粒长大明显,材料抗弯强度降低。

 

关键字: MoSi2;放电等离子烧结;微观结构;力学性能

Microstructure and mechanical properties of MoSi2 prepared by spark plasma sintering
LI Heng1, HAO An-lin2, WANG Ya-lei1, XIONG Xiang1, CHEN Zhao-ke1, SUN Wei1, HAN Xin-xin1

1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. Anyang Institute of Technology, Anyang 455000, China

Abstract:Using MoSi2 micropowder as raw material, MoSi2 ceramics with relative density of 99% was prepared by spark plasma sintering. The effects of sintering temperature on the densification, microstructure and mechanical properties of MoSi2 ceramics were studied. The results show that the MoSi2 ceramics prepared by SPS are made of MoSi2 and a small amount of Mo5Si3 and SiO2. With the increase of sintering temperature, the relative density of product is improved apparently. When the sintering temperature is 1600 ℃, the comprehensive property of the products is optimal, and the relative density and bending strength are up to 98.9% and 417 MPa, respectively. When the sintering temperature rises to 1800 ℃, the relative density remains the same, while the bending strength reduces due to the grain size growth.

 

Key words: MoSi2; spark plasma sintering; microstructure; mechanical property

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f-ysxb@mail.csu.edu.cn