| 摘要 |
PURPOSE:To inexpensively produce a dense metal or ceramics molding by forming the film of a metal or ceramics by the low-pressure plasma thermal spraying thereof on the surface of the green compact of metal or ceramic powder, then subjecting the green compact to a hot hydrostatic pressurizing treatment. CONSTITUTION:The film 4 is formed on the surface of the green compact 1 or sintered body of the metal powder or the ceramic powder by the low-pressure plasma thermal spraying of the above-mentioned powder by using a thermal spraying torch 3. The green compact 1 having the film 4 is then disposed in an HIP device 5 and is subjected to the hot hydrostatic pressurizing treatment via an HIP treating medium gas 7. Pores 6 in the film 4 are annihilated by this treatment and the intrusion of the above-mentioned gas 7 into the green compact 1 is prevented, by which the good HIP treatment is executed. The above-mentioned film 4 is thereafter removed and the dense and defect-free sintered body 8 is obtd. |
