Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Making porous product
Patent
1992-05-12
1994-05-17
Walsh, Donald P.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Making porous product
419 36, 419 46, 419 53, 419 57, B22F 500
Patent
active
053125800
ABSTRACT:
Porous metal components for high temperature fuel cells which are made by integrating the heretofore employed, separate tape casting and pack cementation processes. Particles of a base metal and a master alloy are suspended in a liquid medium in which a binding agent and a halide activator are dispersed. The suspension is cast into the shape wanted in the component, typically by tape casting; and the cast structure is heated to remove the liquid medium, leaving a flexible, green cast structure commonly referred to as a tape. The green tape is so heated as to: (a) burn out the binder in the tape; (b) form an alloy of the base metal and an alloying metal in the master alloy; and (c) sinter the alloy particles into a porous, coherent metal structure.
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Erickson Diane S.
Ong Estela T.
Mai Ngoclan T.
Walsh Donald P.
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