Grain boundary transport through thermally grown alumina scales on NiAl
Source abstract
Abstract
The oxidation resistance of Ni-based alloys is typically improved by additions of elements segregating to grain boundaries, contributing to reducing scale growth, and improving scale adherence. To develop a mechanistic understanding of doping, outward Al and inward O fluxes through the scale formed on β-NiAl with Ti, Y, and Ti+Y additions were characterized for oxidation at 1200 °C and times up to 100 h. Doped alloys exhibited varying reductions in oxidation rates and Al and O fluxes affecting scale grain morphologies. Ti+Y co-doping further reduced the outward Al and inward O transport compared to doping with Ti or Y alone.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · Catalytic Processes in Materials Science · Intermetallics and Advanced Alloy Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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