摘要
本文采用机械合金化法（MA），以元素粉末为原料，对成分为Ni60 Nb40 的混合粉末进行球磨，采取湿磨和逐步提高球磨速度的方法，制备纳米级非晶合金。利用X射线衍射技术对球磨产物进行物相分析。结果表明，采取湿磨和分步提高球磨速度手段会促进纳米级非晶态组织的形成。此非晶合金的形成是晶粒细化、球磨过程中粒子的表面能增大、缺陷和应力增强等多种作用的结果。
In this paper, pure raw materials of Ni and Nb powder is used to synthesize nano--scale amorphous Ni--Nb base alloy with the desired composition Ni60 Nb40 （at. %） by mechanical alloying. During preparation process, wet milling and step--wise increased milling rate ways are employed deliberately. The microstructural evolution during milling process was characterized by X--ray diffraction. The experimental results show that the wet milling and step--wise increased milling rate ways can promote the formation of nanoscale amorphous structure. The amorphization of Ni--Nb base alloy is thought to stem from several reasons, including refinement of grains, as well as the increase of surface energy, defects, stress of the resultant grains during milling process
出处
《中国材料科技与设备》
2012年第1期73-75,共3页
Chinese Materials Science Technology & Equipment
基金
辽宁省教育厅基金资助项目（05L316）
沈阳航空航天大学博士启动基金项目（05YB31）
关键词
Ni-Nb基合金
机械合金化
逐步增速球磨
非晶态
Ni--Nb base alloy
Mechanical alloying
Step--wise increased milling rate
Amorphous
