Method of manufacturing an object of a powdered ceramic material

Details Method of manufacturing an object of a powdered ceramic material Method of manufacturing an object of a powdered ceramic material

1990-09-24

1992-01-14

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 63, C04B 3332

Patent

active

050808435

ABSTRACT:
An object is manufactured from a powdered ceramic material while using isostatic pressing. The powdered material is thereby supplied with a temporary organic binder and is formed into a preformed powder body (10). A major part of the binder is removed from the preformed powder body by driving off under heating, whereas a minor part of the binder, required for keeping the powder body together, is retained in the powder body. The powder body is provided with a gas-permeable embedding material (14) of glass, the retained minor part of the binder then being removed by additional driving off under heating and preferably by also treating the powder body with the surrounding gas-permeable embedding material with an oxidizing gas. The gas-permeable embedding material is then made gas-impermeable by heating and the preformed powder body, freed from binder, with the surrounding gas-impermeable embedding material is subjected to isostatic pressing.

REFERENCES:
patent: 4568516 (1986-02-01), Adlerborn et al.
patent: 4579703 (1986-04-01), Adlerborn et al.
patent: 4647414 (1987-03-01), Mizumo et al.
patent: 4717535 (1988-01-01), Adlerborn et al.
patent: 4778650 (1988-10-01), Hermansson et al.

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