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Iron aluminide alloy container for solid oxide fuel cells

United States Patent

6,114,058
September 5, 2000
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A container for fuel cells is made from an iron aluminide alloy. The container alloy preferably includes from about 13 to about 22 weight percent Al, from about 2 to about 8 weight percent Cr, from about 0.1 to about 4 weight percent M selected from Zr and Hf, from about 0.005 to about 0.5 weight percent B or from about 0.001 to about 1 weight percent C, and the balance Fe and incidental impurities. The iron aluminide container alloy is extremely resistant to corrosion and metal loss when exposed to dual reducing and oxidizing atmospheres at elevated temperatures. The alloy is particularly useful for containment vessels for solid oxide fuel cells, as a replacement for stainless steel alloys which are currently used.
Judkins; Roddie Reagan (Knoxville, TN), Singh; Prabhakar (Export, PA), Sikka; Vinod Kumar (Oak Ridge, TN)
Siemens Westinghouse Power Corporation (Orlando, FL)
09/ 084,145
May 26, 1998
GOVERNMENT RIGHTS The United States government has certain rights in this invention pursuant to Contract Nos. DE-FC21-91MC28055 and DE-AC05-960R22464 awarded by the United States Department of Energy.