Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Making porous product
Patent
1986-01-29
1987-12-22
Terapane, John F.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Making porous product
419 19, 419 57, 148427, B22F 310, C22C 3200
Patent
active
047145862
ABSTRACT:
A method is disclosed for preparing a dimensionally stable electrode structure, particularly nickel-chromium anodes, for use in a molten carbonate fuel cell stack. A low-chromium to nickel alloy is provided and oxidized in a mildly oxidizing gas of sufficient oxidation potential to oxidize chromium in the alloy structure. Typically, a steam/H.sub.2 gas mixture in a ratio of about 100/1 and at a temperature below 800.degree. C. is used as the oxidizing medium. This method permits the use of less than 5 weight percent chromium in nickel alloy electrodes while obtaining good resistance to creep in the electrodes of a fuel cell stack.
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Swarr Thomas E.
Wnuck Wayne G.
Fisher Robert J.
Glenn Hugh W.
Hightower Judson R.
Jorgensen Eric
Terapane John F.
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