| 摘要 |
PURPOSE:To obtain a vessel having superior consumption resistance and a long life by cladding the surface of a Ta-base metal with a Pt-base metal. CONSTITUTION:When a Ta or Ta alloy vessel is used as a crucible for melting glass or ore contg. metallic oxide at a high temp. or as a tray, a boat or the like for vacuum deposition, oxide is easily formed by a reaction with O2 in the air, so the vessel is required to be used in an inert atmosphere. Even though the vessel is used in such a way, when glass, ore or the like contg. metallic oxide is melted, O contained in the resulting melt bonds to Ta to shorten the life of the vessel. The surface of the vessel is clad with Pt or a Pt alloy by physical vapor deposition such as ion plating so as to obtain a vessel having superior oxidation resistance and a long life. |
