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The oxidation of four Ni–10Cr–ySi–4Al alloys was studied at 1100°C to examine the effects of Si additions (from 2 to 6at.%) on the behavior of the alloy Ni–10Cr–4Al. Addition of 2at.% Si prevented completely nickel oxidation, but could not form alumina scales. Larger Si additions produced alumina only over part of the alloy surface (about 20% with 4at.% Si and 30% with 6at.% Si), but could not prevent...
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