발간논문

Home > KJMM 논문 > 발간논문

Vol.33, No.6, 750 ~ 757, 1995
Title
Evolution of Microstructural Change and Phase Transformation in Mechanically Alloyed MoSi2
박형상Hyung Sang Park, 신광선Kwang Seon Shin
Abstract
MoSi₂ alloys were prepared by mechanical alloying of Mo and Si powders. The microstructures of powders were characterized by XRD and SEM after different milling times. The formation procedures of MoSi₂ and phase transformations with temperature were investigated through the DSC and the RTA experiments. The powders milled for 6 hours showed the structure of fine mixture of Mo and Si. The tetragonal MoSi₂ phase and the hexagonal MoSi₂ phase appeared gradually in the powders milled for longer time. After 24 hours of milling, the average grain sizes of Mo and tetragonal MoSi₂ showed the nanocrystaliine structure. The DSC results showed exothermic peak at about 650℃ for the powders which were milled for 24 hours. The results showed that the unreacted fine mixture of Mo and Si transformed to the MoSi₂ phase by fast interfacial reaction which were in good agreement with the RTA results. The activation energy of this reaction was obtained from the Kissinger analysis and found to be 2.3 eV.
Key Words
| PDF
대한금속∙재료학회 │ (06633) 서울시 서초구 서초대로 56길 38 대한금속∙재료학회 회관 (서초1동 1666-12번지)
Tel : 070-4266-1646 │ FAX : 02-557-1080 │ E-mail : metal@kim.or.kr
Copyright ⓒ 2013 사단법인 대한금속∙재료학회 All rights reserved.