| 摘要 |
A body preformed from a powdered material other than silicon nitride is surrounded with a casing, which is permeable to gas. The casing is transformed upon heating into a layer which is impermeable to the pressure medium which is used during isostatic pressing of the preformed body, while a pressure is maintained by a pressure gas outside the casing which is at least as high as the pressure of the gas present in the pores of the preformed product. When the casing has been made impermeable to the pressure medium and the preformed body has been enclosed therein, the isostatic pressing is carried out while simultaneously sintering the body. The casing may be a glass, metal or ceramic powder applied as a slurry or by flame spraying. The powders pressed may be Fe or Ni based alloys or Al2O3. |
