발간논문

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Vol.33, No.3, 414 ~ 421, 1995
Title
Fabrication and Mechanical Properties of SiCw Reinforced 2124Al Matrix Composites
전정식Jeong Sic Jeon, 이호인Ho In Lee, 유연철Yeon Chul Yoo
Abstract
Fabrication and tensile properties were studied on SiC whiskers reinforced 2124Al matrix composites. The composites were fabricated by vacuum hot pressing at 520℃ following hot extrusion at an extrusion ratio of 20 : 1 and at 470℃. After solution heat treatment at 495℃ and 4 hours the tensile tests were performed with aging heat treatment at 177±3℃. At peak aged condition(177±3℃, 5 hours), the tensile strength and elastic modulus were 700 MPa and 115 GPa, respectively. The fractures sources were found to be cavities initiated at the ends of SiC whiskers and fractured Mn-containing particles. On solution heat treated conditions the cleavaged fractures were predominant in matrix and cavities initiated at the sides of SiC whiskers, partialy.
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