摘 要: 采用高能球磨法制备了 W- TiC 纳米复合粉体, 分别采用无水 乙醇、四氯化碳和甲苯作为球磨液体介质, 并改变液体介质比, 研究其 对复合粉体球磨过程的影响, 并对球磨后粉体的晶粒尺寸、晶格畸变、 颗粒形貌以及比表面积进行测定和分析讨论。结果表明, 球磨过程中 适量的液体介质可以有效地改善粉体团聚、结块以及黏壁现象, 提高出 粉率。粉体的比表面积随着液体介质比的增加先增大后减小, 无水乙 醇的液体介质比为 2 时, 球磨后粉体的比表面最大( 2.3 m²/g) , 颗粒形 状近似于球形, 平均粒径 100 nm, 每个颗粒为多晶结构; 液体介质的种 类对粉体比表面影响较小; 添加液体介质对粉体的晶粒细化有利。 

关键词: 高能球磨; 液体介质; 纳米复合粉体

Abstract: The W- TiC nano-composite powder was prepared by high-en ergy ball milling, and the liquid milling medium (C₂H₆O, CCl₄, C₇H₈) and liquid to-ball-and-powder ratio were varied in order to investigate their influence on the nano-composite powder. The results showed that the adding of liquid milling medium decreased the agglomeration and adher ing and increased the powder yield. The specific surface area was obvi ously influenced by liquid to-ball-and-powder ratio. When the liquid milling medium was ethanol and the liquid to-ball-and-powder ratio was 2, the specific surface area reached its maximum 2.3 m²/g, the particle size of powder with quasi-sphere shape and multi-crystal structures could reach to about 100 nm, but the influences of choose of liquid milling medium was inconspicuous. The adding of liquid milling medium is ben eficial to grain refining. 

Keywords: high-energy ball milling; liquid milling medium; nano-com posite powder