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Vol.32, No.3, 299 ~ 306, 1994
Title
Phase Changes of Mechanically alloyed Al - 37.2wt % Ti Powder Mixtures
안정수Jung Soo An, 이상호Sang Ho Lee, 김동관Dong Kwan Kim, 이진형Jin Hyung Lee
Abstract
A powder mixture of elemental aluminum(62.8wt.%) and titanium(37.2wt.%) was mechanically alloyed in an argon-filled jar-type ball mill from 100 to 900 hours. The solid state transformation of each mechanically alloyed powder was investigated by means of X-ray Diffraction(XRD), Differential Scanning Calorimetry(DSC), and Electron Probe Micro-Analyzer(EPMA). The X-ray examinations reveal that elemental particulate sizes decrease down to 3.4㎚ with increasing the mechanical alloying (MA) time of up to 500 hours and then drop slowly to a saturation value of 2.7㎚ for MA 900hours powder. X-ray and DSC studies show that there are three exothermic peaks which are due to the formation of Al₃Ti, AlTi and Al_(24),Ti_8
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