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https://www.riss.kr/link?id=A3047732
김석원 ; 우기도 ; 한상원 ( Sug Won Kim ; Kee Do Woo ; Sang Won Han )
1994
-
500
KCI등재
학술저널
471-479(9쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
Al-2%Si-2%Mg alloy containing SiC particle in 20, 70㎛ were prepared by mean of squeeze casting with various pressure 50, 100, 150 and 220㎫ respectively. The specimens were made by casting into 50ø×100ℓ mold under various squeeze conditions(pr...
Al-2%Si-2%Mg alloy containing SiC particle in 20, 70㎛ were prepared by mean of squeeze casting with various pressure 50, 100, 150 and 220㎫ respectively. The specimens were made by casting into 50ø×100ℓ mold under various squeeze conditions(pressures, pressurizing temperature, particle sizes). Mechanical properties(hardness, tensile strength, elongation and wear characteristics) were evaluated at room temperature with those various fabrication factors. It became feasible to make favorable Al-SiCp composite free from casting defects by the injection of Ar gas during melting and 100㎫ pressure squeeze casting. However, pressure of 50㎫ was not sufficient to avoid completely porosity formation as a result of precessing and shrinkage during solidification. As the particle size is smaller and the squeeze pressure is higher, the hardness and tensile strength at room temperature are higher. Cell size became smaller gradually with increase of squeeze pressure. With increase of squeeze pressure(㎫), wear behaviors of those composites were changed from adhesive into abrasive wear, and the tendency of above behavior became outstanding with increasing sliding speed. The chemical reaction(4Al+3SiC→Al₄C₃+3Si) is more accelerated at interface between SiCp and matrix with increase of squeeze pressure. Therefore Al₄C₃ intercompound and Si peak intensity is increased at interface.