| 摘要 |
PURPOSE:To easily produce a formed ceramic member by forming a film of a fire resistant metal on the surface of a base material made of a metal, thermally spraying ceramics on the film, oxidizing the film under heating and pulling the base material out of the resulting thermally sprayed ceramic body. CONSTITUTION:A film 14 of a fire resistant metal such as W, Mo, Ta or Hf is formed on the surface of a cylindrical base material 11 made of mild steel or the like by thermal spraying with a thermal spraying device 12. During the formation of the film 14, the inside of the base material 11 is cooled with a cooler 13 so as to prevent the film 14 from losing the adhesion and strength by oxidation at high temp. A ceramic layer 15 of a prescribed thickness is then formed on the film 14 by thermal spraying and heated to >=500 deg.C with a heater 16 in an atmosphere contg. oxygen, e.g., in the air to violently oxidize the film 14. By this oxidation, the bonding strength between the base material 11 and the ceramic layer 15 is reduced. The base material 11 is separated from the ceramic layer 15 and the resulting formed ceramic body is subjected to final finish working to obtain a formed ceramic member. |
