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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국분말야금학회 한국분말야금학회지 한국분말야금학회지 제18권 제2호
발행연도
2011.1
수록면
141 - 148 (8page)

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Carbon material shows relatively high strength at high temperature in vacuum atmosphere and can be easily removed as CO or CO_2 gas in oxidation atmosphere. Using these characteristics, we have investigated the applicability of carbon mold for precision casting of high melting point metal such as nickel. Disc shape carbon mold with cylindrical pores was prepared and Ni-base super alloy (CM247LC) was used as casting material. The effects of electroless Nickel plating on wettability and cast parameters such as temperature and pressure on castability were investigated. Furthermore, the proper condition for removal of carbon mold by evaporation in oxidation atmosphere was also examined. The SEM observation of the interface between carbon mold and casting materials (CM247LC), which was infiltrated at temperature up to 1600℃, revealed that there was no particular product at the interface. Carbon mold was effectively eliminated by exposure in oxygen rich atmosphere at 705℃for 3 hours and oxidation of casting materials was restrained during raising and lowering the temperature by using inert gas. It means that the carbon can be applicable to precision casting as mold material.

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