Method of manufacturing an object of powdered material by isosta

Details Method of manufacturing an object of powdered material by isosta Method of manufacturing an object of powdered material by isosta

1987-05-11

1988-01-05

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Consolidation of powder prior to sintering

419 39, 419 49, 264 65, 264570, B22F 100

Patent

active

047175354

ABSTRACT:
When manufacturing an object of powdered material by isostatic pressing of a body (10), preformed from the powdered material, with a gaseous pressure medium, the preformed body is provided with a casing (19) of glass which is made gas-impermeable by heating before carrying out the isostatic pressing. Inside the glass casing there is arranged on the preformed body a barrier layer (11) which counteracts the penetration of melted glass from the enclosure in the preformed body. The barrier layer is built up of at least two layers, of which one layer (12) at least substantially consists of powdered boron nitride and one layer (13) of a mixture of powdered boron nitride and a powdered material with the ability, upon contact with glass from the casing in melted form, to make a layer containing boron nitride tighter.

REFERENCES:
patent: 3992200 (1976-11-01), Chandhok
patent: 4081272 (1978-03-01), Adlerborn
patent: 4112143 (1978-09-01), Adlerborn et al.
patent: 4212669 (1980-07-01), Veeck et al.
patent: 4545955 (1985-10-01), Dickson
patent: 4568516 (1986-02-01), Adlerborn et al.

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