Tungsten skeleton structure fabrication method employed in appli

Details Tungsten skeleton structure fabrication method employed in appli Tungsten skeleton structure fabrication method employed in appli

1998-06-12

1999-10-05

Mai, Ngoclan

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Post sintering operation

419 2, 419 23, 419 35, 419 37, B22F 316

Patent

active

059637730

ABSTRACT:
A tungsten skeleton structure fabrication method employed in an application of a copper infiltration and tungsten-copper composite fabrication method includes the steps of forming a source powder by coating the tungsten powder surface having a purity of 99.9 weight percent and 2.about.5 .mu.m in size, with nickel by less than 0.06 weight percent (600 ppm), forming an injection molded admixture by admixing a source powder and a polymer binder, carrying out a powder injection molded with regard to the admixture, and obtaining a tungsten skeleton structure by removing the polymer binder from the resultant injection molded body. The method prevents the molded body from being unevenly shrunken during a liquid phase sintering for thereby decreasing its production cost.

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