Mg-W复合材料的SPS制备及其力学性能  

Fabrication and Mechanical Property of Mg-W Composites by Spark Plasma Sintering

作　　者：周敬[1] 沈强[1] 罗国强[1] 张联盟[1] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,武汉430070

出　　处：《武汉理工大学学报》2008年第4期5-8,共4页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(10574102)

摘　　要：采用放电等离子体烧结技术(SPS)在低的烧结温度(600℃)下制备出质量分数0—92%W的致密Mg-W复合材料,通过XRD、SEM等测试手段对样品进行分析。结果表明,在Mg-W复合材料中,Mg和W是以机械混合的形式存在。低W含量的样品中,部分熔化的Mg将Mg颗粒连接在一起,W分散在Mg基体中;高W含量的样品中,部分熔化的Mg将W颗粒连接在一起。通过对复合材料的声速以及弯曲强度的测量表明,随着W含量的增加,复合材料的弹性模量增加,泊松比降低,弯曲强度增加。Mg-W composites with 0—92% W were prepared by spark plasma sintering(SPS) technique at 600 ℃-30 MPa-5 min.The mechanism of densification was researched and the relation between the mechanical property and the content of W was discussed.The results indicated that W and Mg exit in the composites through mechanical mixtures.The samples with low content of W were spread by partly molten Mg connecting the particles of Mg,the ones with high content of W through molten Mg joining the particles of W together.Increa...

关 键 词：Mg-W复合材料 放电等离子体烧结 机械混合 弹性模量 

分 类 号：TB331[一般工业技术—材料科学与工程]