Effect of Si content on the surface high-temperature oxidation mechanism in Ni5Y-containing NiAIYSi alloys
Source abstract
Abstract
The influence of Si content on the oxidation behavior of the Y-related structure (Ni 5Y) in NiAlYSi alloy was investigated. The higher Si content increases the diffusion energy barrier of Ni in the Ni 5Y phase, preventing the growth of NiO in the outer layer. The inward diffusion of O is effectively impeded by the Y 2SiO 5+Y 2Si 2O 7+Al 2O 3+Y 2O 3 layer produced by the (Ni, Al, Si) 5 Y phase. The outward diffusion of Ni is also inhibited by this layer. Therefore, the oxidation mechanism of the Ni 5Y phase is altered by Si, which has not been found before.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · Intermetallics and Advanced Alloy Properties · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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