溶胶-球磨超细W-Cu复合粉末烧结性能研究  

Properties of W-Cu composite powders synthesized by sol-ball milling

作　　者：范景莲[1] 郭垚峰[1] 蒋冬福[1] 刘涛[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《功能材料》2013年第20期2927-2930,共4页Journal of Functional Materials

基　　金：国家自然科学基金创新群体资助项目(51021063);国家杰出青年科学基金资助项目(50925416);国家青年科学基金资助项目(51004116)

摘　　要：采用溶胶-球磨法制备W-10Cu、W-20Cu复合粉末,研究了球磨工艺对粉末粒度、形貌和烧结性能的影响。研究结果表明,球磨粉末呈现双峰粒度分布,球磨20h的W-10Cu、W-20Cu粉末的粒度分别为1.03和1.15μm。球磨过程中,粉末比表面积变换式ln[(Sm-S0)/(Sm-S)]与球磨时间t符合线性关系。W-10Cu、W-20Cu复合粉末球磨20h,可以在1380℃一步液相烧结达到近全致密,显微组织细小且均匀。In this study, W-10Cu/W-20Cu composite powders were fabricated by sol-spray drying and ball mill ing. The particle sizes and morphology of the composite powders were tested, the densification behave was studied. The results show that a new peak appeared after milling. After 20 hours ball milling, particle sizes of W-10Cu/W-20Cu were 1.03 and 1. 15μm, respectively. The derivation of specific surface area ln[（Sm- S0）/ （Sm--S）] and milling time t match linear relationship. When sintered directly at 1380℃ after 20h milling, W 10Cu/W-20Cu composites had a uniform composition distribution and fine grain sizes, which approached to full density.

关 键 词：金属材料 W—Cu复合粉末 喷雾干燥 高能球磨 

分 类 号：TG146.4[一般工业技术—材料科学与工程]