자전연소합성법 및 교반주조 공정으로 제조된 TiC/Mg 금속복합재료의 특성연구
Characterization of TiC/Mg Composites Fabricated by in-situ Self-propagating High-temperature Synthesis followed by Stir Casting Process
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초록
본 연구에서는 Al-Ti-C 반응계의 점화온도에 대해 고찰하고, 자전연소합성법 및 교반주조 공정을 통해 TiC/ Mg 금속복합재료를 제조하여 미세조직 및 기계적 특성을 분석하였다. 0, 10, 20, 30 vol.% TiC 입자가 균일하게 분산된 Mg 복합재료를 제조하였고, 강화재의 양이 증가할수록 기지 대비 우수한 압축강도 및 내마모특성을 보였다. 이는 in-situ 자전연소합성법에 의해 결함이나 불순물 등의 오염이 적은 TiC/Mg 금속복합재료 제조로 기지에서 강화재로의 효과적인 하중 전달에 의한 것으로 판단된다.
Abstract
In this study, the ignition temperature of the Al-Ti-C reaction system, the microstructure and the mechanical properties of the TiC/Mg composite which produced by the self-propagating high-temperature synthesis (SHS) followed by stir casting process were investigated. Mg based composite with uniformly dispersed 0, 10, 20, and 30 vol.% TiC were fabricated, and higher volume fraction of TiC reinforced composite showed superior compressive strength and wear resistance as compared with Mg matrix. It is attributed to the less contamination, defects, impurities in TiC/Mg composite by the in-situ SHS yield effective load transfer from the matrix to the reinforcement.
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