超细/纳米W-Cu复合粉的制备方法及烧结致密化机制  

Preparation Methods and Sintering Densifying Mechanism of Ultrafine and Nano-sized W-Cu Composite Powders

作　　者：卓海鸥[1,2] 刘文胜[2] 陈树茂 

机构地区：[1]赣州有色冶金研究所,江西赣州341000 [2]中南大学粉末冶金研究院,湖南长沙410083 [3]赣州华茂钨材料有限公司,江西赣州341000

出　　处：《中国钨业》2016年第5期60-65,共6页China Tungsten Industry

基　　金：国家自然科学基金(51364036);江西省博士后科研择优资助项目(2016KY11)

摘　　要：超细/纳米W-Cu复合粉由于烧结活性高、元素分布均匀,可制备出高致密度、组织均匀细小、性能优良的W-Cu复合材料,在微电子工业、电极触头材料和航天军工等领域受到越来越多的关注,已经成为W-Cu复合材料领域的研究热点。文章综述了近些年来国内外超细/纳米W-Cu复合粉制备方法的研究现状,主要包括机械合金化法、机械化学法、化学共沉淀法、喷雾干燥-氢还原法等,还介绍了改进W-Cu复合粉烧结性能的工艺,并对W-Cu复合粉的烧结致密化机理进行了论述。W-Cu composites prepared from ultrafine or nano-sized W-Cu composite powders have characteristic of high density,fine and uniform microstructure,excellent physical and mechanical properties,for its high sintering activity and uniform element distribution.Ultrafine or nano-sized W-Cu composite powders have drawn much attention in microelectronics,electrode and contact materials,spaceflight and military industry,which have been the research hotspot in the field of W-Cu composites.The preparation methods of ultrafine or nano-sized W-Cu composite powders,including mechanical alloying,mechanochemistry,chemical coprecipitation and spray drying-hydrogen reduction are presented.In addition,we introduce the methods to improve the sintering property of W-Cu composite powders by discussing the sintering densifying mechanism.

关 键 词：W-Cu复合粉 制备方法 烧结 致密化机制 

分 类 号：TB331[一般工业技术—材料科学与工程]