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PROCESS AND CERAMIC MOULD FOR PRODUCING TITANIUM DENTAL CASTINGS AND CERAMISABLE COMPOSITION FOR MAKING SUCH A CERAMIC MOULD
PROCESS AND CERAMIC MOULD FOR PRODUCING TITANIUM DENTAL CASTINGS AND CERAMISABLE COMPOSITION FOR MAKING SUCH A CERAMIC MOULD
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机译:钛合金铸件的生产工艺和陶瓷模具以及制造这种陶瓷模具的可熔成分
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摘要
In order to prevent the embrittlement of the outer surfaces of titanium dental castings caused by alpha case formation, the invention proposes a process and a ceramic mould in which the surfaces of the mould, including those of the casting hopper and casting channels which come into contact with the molten titanium are coated with a gas-permeable ceramic shell inert with respect to the molten titanium which is embedded in a gas-permeable, ceramic or ceramisable supporting compound of such a composition that the ceramic shell embedded n the supporting compound is under compressive stress during it sintering process and the casting operation.
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