热机械法制备超细弥散分布钨铜复合粉末  

Thermomechanical process producing W-Cu composite powder with ultrafine dispersion structure

作　　者：李云平[1] 曲选辉[1] 郑洲顺[1] 雷长明[1] 

机构地区：[1]中南大学粉末冶金研究院,长沙410083

出　　处：《粉末冶金技术》2004年第5期266-269,共4页Powder Metallurgy Technology

摘　　要：本研究在对钨铜粉末共还原的基础上设计了一种热机械法来制备超细弥散分布钨铜复合粉末。对粉末通过SEM、XRD、粒度分析、氧含量及其烧结性能的研究 ,结果显示 :通过对钨铜高温氧化物粉末的短时快速球磨 (约 3～ 10小时 )后 ,复合粉末可在较低的温度下还原彻底 ,而且粉末粒度细小 (0 2 μm左右 ) ,分布均匀 ,比表面增加 ,具有极高的烧结性能。对比机械合金化工艺直接制备钨铜复合材料工艺得知 :对氧化物粉末进行了短时高能球磨 ,快速细化了氧化物粉末粒度 (<1μm) ,降低了粉末还原温度 (6 5 0℃ ) ,制备出高分散的超细钨铜复合粉末 (<1μm) ,在较低的烧结温度 (12 0 0℃ )下得到相对密度为 99 5 %、热导率为 2 0 5W·m- 1 ·K- 1 的钨铜复合材料制品。A thermomechanical process producing W-Cu composite powder with ultrafine dispersion structure was developed on the basis of the co-reduction method of W-Cu oxide powders. The produced powder was investigated by SEM, XRD, particle size distribution, oxygen contort and sintering behaviour. The results show that W-Cu oxide powders milled for 3-10 hrs are thoroughly reduced at relative low temperature and ultrafine W-Cu composite powder with high dispersion is produced by high-energy-milling the oxide powders in short time. W-Cu composite material sintered at 1200°C has relative density of 99.5% and thermal conductivity of 205 W·m-1 ·K-1.

关 键 词：超细 直接制备 高分散 烧结性能 复合粉末 还原温度 氧化物 铜粉 粉末粒度 高能球磨 

分 类 号：TF123[冶金工程—粉末冶金] TQ174[冶金工程—冶金物理化学]