분말피복압연법에 의해 제조된 (SiC)p/Al 복합재료의 미세조직 및 기계적 성질
Microstructure and Mechanical Properties of (SiC)p/Al Composite Fabricated by a Powder-in Sheath Rolling Method
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Abstract
Aluminum based metal matrix composite reinforced with SiC particles was fabricated by the powder-in sheath rolling method. A stainless steel tube with outer diameter of 12 mm and wall thickness of 1mm was used as a sheath. Mixture of aluminum powder and SiC particles of which volume content was varied from 5 to 20vol.% was filled in the tube by tap filling and then rolled to 75% reduction at ambient temperature. The rolled specimen was sintered at 560℃ for 0.5hr. The tensile strength of the (SiC)p/Al composite increased with the volume content of SiC particles, and at 20vol.% it reached a maximum of 100MPa which is 1.6 times higher than unreinforced material. The elongation decreased with the volume content of Al2O3 particles. The mechanical properties of the (SiC)p/Al composite fabricated by the powder-in sheath rolling is compared with that of (Al2O3)p/Al composite by the same process.