Synthesis of amorphous Ti-Al alloys by mechanical alloying of elemental powders

作     者：张俊红 黄伯云 贺跃辉 周科朝 刘咏 

作者机构：Central South University Changsha 410083 Central South University State Key Laboratory for Powder Metallurgy Changsha 410083 

出 版 物：《中国有色金属学会会刊：英文版》 (Transactions of Nonferrous Metals Society of China)

年 卷 期：2002年第12卷第4期

页      面：610-614页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project ( 715 -0 0 5 -0 0 40 )supportedbytheNationalAdvancedMaterialsCommitteeofChina 

主　　题：非晶合金 TiAl合金 机械合金化 粉末冶金 

摘      要：Blended elemental powders with the nominal compositions (mole fraction, %) of Ti 54 Al 46 , Ti 52 Al 48 and Ti 50 Al 50 were mechanically alloyed in a planetary ball milling system for up to *** structure evolution in these powders was characterized by scanning electron microscope, X ray diffraction and differential thermal analysis techniques. It was found that elemental powders were progressively transformed into nanocrystalline Ti(Al) supersaturated solid solution, then into amorphous phase. With increasing Al content, the formation of a fully Ti(Al) supersaturated solid solution and amorphous phase were accelerated, which are attributed to the fine grain size. And the grain size condition for formation of amorphous phase in this system is ≤16?nm.