2018-9-6 · The effect of yttrium and thorium on the oxidation behavior of Ni-Cr-Al alloys. NASA Technical Reports Server (NTRS) Kumar, A.; Nasrallah, M.; Douglass, D. L. 1974-01-01. The effect of quaternary additions of 0.5% Y, 0.5 and 1.0% Th to a base alloy of Ni-10CR-5Al on the oxidation behavior and mechanism was studied during oxidation in air over the range of 1000 to 1200 C.
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