放电等离子烧结温度对超细晶W-40Cu复合材料的影响  

Effect of Sparking Plasma Sintering Temperature on the Microstructure and Properties of Ultra-fine Crystalline W-40Cu Composites

作　　者：陈春浩[1] 曾云 薛丽红[1] 严有为[1] 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室 [2]荆州市巨鲸传动机械有限公司

出　　处：《特种铸造及有色合金》2011年第12期1151-1154,共4页Special Casting & Nonferrous Alloys

基　　金：国际热核聚变实验堆(ITER)计划专项资助项目(2010GB109000)

摘　　要：采用高能球磨法制备了W-40Cu超细晶复合粉体,继而进行了放电等离子烧结(SPS),获得了致密的超细晶W-40Cu块体复合材料,着重研究了烧结温度对复合材料组织和性能的影响。结果表明,随着烧结温度升高,材料的致密度、硬度和电导率也随之升高;在950℃烧结5min的W-40Cu复合材料,W颗粒尺寸约300～500nm,相对致密度达98%,显微硬度HV为287,电导率为17.9MS/m。Bulk ultra-fine crystalline W-40Cu composites with compact structure were fabricated by spark plasma sintering（SPS） technique with super microcrystalline W-40Cu powders which were prepared by high energy ball milling technology.The effects of sintering temperature on the microstructure and properties of the composites were investigated.The results,show that with the increase of the sintering temperature from 800 ℃ to 950 ℃,the relative density,micro-hardness,and electrical conductivity of the composites prepared are increased.The composites sintered at 950 ℃ for 5 min make approximately 300～500 nm in W grain size,287HV in micro-hardness,relative density of 98%,and electrical conductivity of 17.9 MS/m.

关 键 词：W-CU复合材料 放电等离子烧结 烧结温度 细晶组织 

分 类 号：TB331[一般工业技术—材料科学与工程]