MEMBER FOR DRAWING UP HIGH PURITY ALUMINUM

摘要

PROBLEM TO BE SOLVED: To provide a member for drawing up a high purity aluminum having little oxidizing wearing and standing up to use for long time at a low cost. ;SOLUTION: The member 1 for drawing up a high purity aluminum is constituted of a core member 11 integrally forming a basic part 12 as a fitting part to a jig and a shrinking diameter part 13 projecting from the basic part 12 with a graphite having ≥99% purity, and a casting body 21 arranged on the outer periphery of the shrinking diameter part 13, and also a butted on the lower surface of the basic part 12 and composed of graphite-ceramic composite material. On the outer periphery of the bottomed cylindrical core member, a coating body composed of the graphite-ceramic composite material, can be formed. The bottomed cylindrical part of the core member, can be cooled by pouring gaseous nitrogen, etc. A buffering material is interposed between the core member and the coating body formed at the outer periphery and composed of the graphite-ceramic composite material and thus, sintered strain at the sintering time and thermal-stress strain at the using time caused by the difference of both coefficients of thermal expansion can be released.;COPYRIGHT: (C)2000,JPO