射频等离子体制备球形钛粉

稀有金属材料与工程, 2013, 42(6): 1291-1294.

射频等离子体制备球形钛粉

盛艳伟 ^1, , 郭志猛 ^2, , 郝俊杰 ^3, , 邵慧萍 ^4, , 王述超 ^5,

1.北京科技大学,北京100083

2.北京科技大学,北京100083

3.北京科技大学,北京100083

4.北京科技大学,北京100083

5.北京科技大学,北京100083

基金项目: 国家自然科学基金(51274039) 新金属材料国家重点实验室开放基金资助项目(2010Z-09) 北京市先进粉末冶金材料与技术重点实验室开放基金

关键词：射频等离子体 , 球形钛粉 , 脱氢分解 , 球化处理

Preparation of Micro-spherical Titanium Powder by RF Plasma

Sheng Yanwei ^1, , Guo Zhimeng ^2, , Hao Junjie ^3, , Shao Huiping ^4, , Wang Shuchao ^5,

1.北京科技大学,北京100083

2.北京科技大学,北京100083

3.北京科技大学,北京100083

4.北京科技大学,北京100083

5.北京科技大学,北京100083

Keywords： RF plasma , spherical titanium powder , dehydrogenation , spheroidization

以不规则形状的大颗粒TiH2粉末为原料,采用射频等离子球化处理技术制备出微细球形Ti粉.采用扫描电子显微镜、X射线衍射和激光粒度分析测试方法对粉末形貌、物相和粒度进行测试.结果表明:大颗粒的TiH2粉末的脱氢分解、爆碎和球化处理在等离子体中一步完成,得到微细球形粉末.其相组成主要为Ti和残余TiH相;球形粉末在1.3×10-4 Pa真空条件下,经750℃、2h脱氢处理后得到单相球形Ti粉.颗粒平均粒径由原来的100～150μm减小至20～50μm,球化率可达到100％.随着加料速率的增加,粉末的球化率降低.采用射频等离子体处理TiH2粉是制备微细球形钛粉的一种新方法.

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