机械合金化对W-20Cu复合材料的显微组织与性能的影响Effects of mechanical alloying on microstructure and properties of W-20Cu composites
汪峰涛,吴玉程,王涂根,任榕
摘要(Abstract):
采用机械合金化结合粉末冶金技术制备W-20Cu(vol%)复合材料。利用扫描电镜和金相显微镜对不同球磨时间的W-20Cu复合材料显微组织进行表征,并对材料的各项物理性能进行测试。结果表明,随着球磨时间的延长,W-20Cu烧结体的组织越来越均匀,Cu相分布也越来越均匀。W-20Cu烧结体密度、收缩率、硬度、抗弯强度随球磨时间的延长而增大;球磨20h的W-20Cu复合粉烧结体热导率达到峰值(130.61 Wm~(-1)K~(-1)),继续球磨,热导率减小。综合考虑所有研究结果,通过机械合金化所制备的W-Cu复合粉体可以获得具有优异综合物理性能的W-20Cu复合材料。
关键词(KeyWords): W-Cu;复合材料;机械合金化;显微结构;物理性能
基金项目(Foundation): 安徽省自然科学基金(070414180);; 安徽省“十五”二期科技攻关项目(040020392);; 合肥市重点科技攻关项目(20051044)
作者(Author): 汪峰涛,吴玉程,王涂根,任榕
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