摘要：由于NiAl基金属间化合物的一些优异性能,长期以来作为高温结构的候选材料而得到了广泛的关注。本文中用机械合金化法合成了NiAl金属间化合物粉末,详细介绍了球磨工艺,对NiAl金属间化合物粉末的形貌和物相进行表征。结果表明,金属Ni和Al的粉末在球磨机内仅球磨5h就可以使大部分金属粉末转化为NiAl金属间化合物,随着球磨时间的延长,金属间化合物有细化的趋势。

关键词：NiAl金属间化合物；机械合金化；表征

Abstract：Because of many excellent properties of NiAl-based intermetallics compound,it is being considered as a material for high temperature applications.NiAl intermetallics powder was compounded by the method of mechanical alloying and its ball milling process was discussed.The image and phase of powder were charactered.The results show that the powder of Ni and Al change greater part intermetallics within 5 hours during the mechanical alloying process,and the intermetallics have abviously tended to small along with the prolong of time of mechanical alloying.

Keywords：NiAl intermetallics;mechanical alloying;characterization