Powder metallurgy processes – Forming articles by uniting randomly associated metal particles – Consolidation of powders
Patent
1995-08-14
1998-10-20
Nelson, Peter A.
Powder metallurgy processes
Forming articles by uniting randomly associated metal particles
Consolidation of powders
419 61, 10220211, B22F 100, F42D 300
Patent
active
058261605
ABSTRACT:
A method and apparatus for fabricating high density monolithic metal and alloy billets. The process requires preheating precursor materials of metal or alloy billets by means of a combustion synthesis called Self-Propagating High-Temperature Synthesis (SHS). The reaction takes place in an insulated reaction vessel where the precursors, in a powder form, are heated to high temperatures. The precursors are then compacted to high density by means of pressure waves generated by detonation of an explosive. The method is capable of producing high purity tungsten and tungsten-based alloys of greater than 90% theoretical density.
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Krosnick Freda L.
Nelson Peter A.
Roberto Muzio B.
The United States of America as represented by the Secretary of
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