발간논문

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Vol.34, No.7, 902 ~ 909, 1996
Title
Research Paper - Composite Materials - : In - situ Synthesis of TiB2 Particle Reinforced TiAl based Intermetallic Composites
이태원T . W . Lee, 이지환C . H . Lee, 황선근S . K . Hwang, 박원구W . K . Park
Abstract
This study was focused to examine fabrication process of TiB₂ particle reinforced TiAl based intermetallic composites by reactive synthesis. The mixed powders were canned, hot-pressed under vacuum and then hot-extruded at 420℃ under extrusion ratio of 15:1. Subsequently. reactive synthesis was carried out at 700℃ under vacuum Thermal analysis has been perfomed to investigate the ignition temperature and combustion temperature for Ti-Al system and Ti-Al-B system. The combustion temperature of Ti-Al-B powder mixture was found to be higher than that of Ti-Al powder mixture. The Ti-Al-B powder mixture was reacted exothermically to form the material consisting of TiAl and TiB₂. The tensile strength of the TiB₂/TiAl composites was proved to be higher than that of the matrix. Swelling phenomenon, resulting from formation of a large amount of pores was observed at all reactive synthesis conditions.
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