Amorphization/crystallization behaviors of Ti50Al45Si5 multi-component powder treated by mechanical alloying and subsequent heat treatment
作者： Jeong-Han Lee , Hyun-Kuk Park , Jun-Ho Jang , Sung-Kil Hong , Ik-Hyun Oh
DOI: 10.1016/J.JALLCOM.2019.05.047
关键词: Crystallization 、 Phase (matter) 、 Strain energy 、 Amorphous solid 、 Crystallinity 、 Alloy 、 Crystallite 、 Rietveld refinement 、 Chemical engineering 、 Materials science
摘要: Abstract In this study, Ti50Al45Si5 multi-component powders are synthesized to investigate their amorphization or crystallization behaviors by mechanical alloying and subsequent heat treatment. The mechanically alloyed powder was ball-milled with different milling time, the respective crystallographic properties classified. Under time of 5 h, remained only as a refined single phase crystallite, no alloy behavior occurred. 15 h showed crystalline/amorphous mixed phases depending on continuous alloying, corresponding grain refinement increase strain energy. At 25 h milling, completely amorphized. To amorphized powder, treatment conducted at temperature (500 850) °C, which flow change observed during DTA/DSC analysis. Additionally, crystallinity calculated using Rietveld method X-ray diffraction for quantitative analysis crystalline powder.
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