B - Operations – Transporting – 30 – B
Patent
B - Operations, Transporting
30
B
18/1119
B30B 13/00 (2006.01) B22F 3/12 (2006.01) B22F 3/15 (2006.01) B28B 3/00 (2006.01) C04B 35/593 (2006.01)
Patent
CA 1066866
ABSTRACT OF THE DISCLOSURE: The invention is concerned with a method for manufac- turing objects by isostatic pressing of a preformed powder body enclosed in a deformable casing at such an elevated temperature and such a pressure that the powder grains are bonded and the body is compressed to a density near the theoretically possi- ble density. The method of the invention comprises preforming a body of powder; arranging the body in a glass capsule of a first material and embedding the body in a glass powder of a second material with a higher softening temperature than the first material; evacuating and sealing the capsule with the embedded body; heating the capsule with its contents to at least the softening temperature of the first material and subjecting it in a pressure furnace to an isostatic pressure from a pressure medium. The invention is particularly suited for manufacturing bodies of special materials which are diffi- cult to machine, such as silicon nitride, boron nitride and super-alloys.
244965
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