HEAT RESISTANT Ir BASE ALLOY

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PROBLEM TO BE SOLVED : To provide an Ir base alloy usable for a short time or a long time in a high temperature region even in an oxygen-containing atmosphere, and in which selective oxidation from grain boundaries is suppressed. SOLUTION : Disclosed is an alloy including 0.05 to 1.5% Al, and the balance Ir. Also disclosed is an alloy further including 0.1 to 49.95% Rh, or at least one kind selected from Cr, Fe, Co and Ni by 0.1 to 10%, or at least one kind selected from Pt, Ru, Ta, Nb, W, Re, Ti, Hf, Zr, Y and rare earth elements by 0.1 to 20.0%. COPYRIGHT : (C)2009, JPO&INPIT