摘要
在1 250℃熔渗3 h制备了W/Y_(2)O_(3)-Cu复合材料,在700~1 000℃不同温度下对其进行高温退火处理,通过SEM对退火后复合材料表面和断口形貌进行表征,采用维氏硬度计、He检漏仪、激光导热仪、热机械分析仪和弯曲力学性能试验机对退火后复合材料的性能进行检测。研究结果表明:退火后复合材料与未退火样品具有相同的组织均匀性,退火降低了组织中的残余应力,使得W/Y_(2)O_(3)-Cu复合材料的热导率得到明显改善;退火对复合材料的热膨胀系数影响很小。900℃退火1h后W/Y_(2)O_(3)-Cu复合材料的热导率提升至最高197.67W/(m·K),热膨胀系数为6.9×10^(-6)/K,室温弯曲强度为1 169.7 MPa。
This article presents the high-temperature annealing process of W/Y_(2)O_(3)-Cu composite material prepared by melting infiltration at 1250℃for 3 hours at temperatures ranging from 700 to 1000℃.The surface and fracture morphology of the annealed composite material are characterized by SEM,and the properties of the annealed composite material are tested by Vickers hardness tester,He leak detector,laser thermal conductivity tester,thermal mechanical analyzer,and bending mechanical performance testing machine.The results of the research are as follows:After annealing,the composite material exhibits the same structural uniformity as the original sample.Annealing reduces the residual stress in the structure,resulting in a significant improvement in the thermal conductivity of W/Y_(2)O_(3)-Cu composite material.Annealing has little effect on the thermal expansion coefficient of the composite material.After annealing at 900℃for 1 hour,the thermal conductivity increased to the highest of 197.67W/(m·K),and the thermal expansion coefficient was 6.9×10^(-6)/K,with a room temperature bending strength of 1169.7 MPa.
作者
陈玉柏
傅义毅
李世豪
罗来马
CHEN Yubo;FU YiYi;LI Shihao;LUO Laima(Ganzhou Nonferrous Metallurgical Research Institute Co.,Ltd.,Ganzhou 341000,Jiangxi,China;School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,Anhui,China;National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology,Hefei 230009,Anhui,China;Copper Alloy and Forming Engineering Research Center of Ministry of Education,Hefei 230009,Anhui,China)
出处
《中国钨业》
CAS
2023年第3期72-79,共8页
China Tungsten Industry
基金
国家重点研发磁约束聚变能发展专项(2019YFE03120002)
安徽省重点研发项目(202104a05020045)
安徽省自然基金杰出青年基金(2108085J21)。
作者简介
陈玉柏(1979-),男,安徽宿州人,博士,高级工程师,本刊中青年编委,主要从事硬质合金材料生产研究工作;通讯作者:罗来马(1980-),男,江西奉新人,教授,博士生导师,本刊编委,主要从事粉末冶金与钨材料研究。
