Synthesis of amorphous Ti-Al alloys by mechanical alloying of elemental powders
来源期刊：中国有色金属学报(英文版)2002年第4期
论文作者：张俊红 黄伯云 贺跃辉 周科朝 刘咏
文章页码：610 - 614
Key words：Ti-Al alloy; mechanical alloying; amorphisation
Abstract: Blended elemental powders with the nominal compositions (mole fraction, %) of Ti54Al46, Ti52Al48 and Ti50Al50 were mechanically alloyed in a planetary ball milling system for up to 100h.The 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 trans formed 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 ≤16nm.
