机械合金化法制备Ni-Nb纳米级非晶合金  

Preparation of Ni--Nb Base Nano--Amorphous Alloy by Mechanical Alloying

作　　者：吕墨豪[1] 东野生栓[1] 高崇[1] 武保林[1] 赵玉华[1] 张利[1] 杜兴蒿[1] 

机构地区：[1]沈阳航空航天大学材料科学与工程学院,辽宁沈阳110136

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）

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

关 键 词：Ni-Nb基合金 机械合金化 逐步增速球磨 非晶态 

分 类 号：TB35[一般工业技术—材料科学与工程]