The oxidation of single-crystal nickel-based superalloys
A. Akhtar, S. Hegde, R. Reed
2006
Citations
31
Citations
Journal
JOM
Full text
Semantic Scholar
Key Takeaway Key Takeaway: Nickel-based single-crystal superalloys undergo a phase transformation due to external oxidation, leading to the formation of spinel Ni (Cr, Al)2O4 and Al2O3.
Abstract
A phase transformation occurs in nickel-based single-crystal superalloys as a result of the oxidation that creates the external NiO scale. This transformation, which is the precursor to internal oxidation, creates the β phase (NiAl) first followed by the δ phase (Ni2Al3) prior to the formation of the spinel Ni (Cr, Al)2O4 and Al2O3 in succession. The implications of this effect on the rate of oxidation are discussed in this article.
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