Investigation on failure mechanism and interfacial diffusion behavior of NiCoCrAlYTa coating at high temperature
Source abstract
Abstract
The isothermal oxidation behavior of NiCoCrAlYTa coating deposited by arc ion plating (AIP) technology on DZ22B substrate was systematically investigated at 1050 ℃ and 1100 ℃ for 200 h. The results revealed a transition in oxide scale composition, which of undulation degree was also increased. The growth process of oxide scale involved additional control mechanisms except internal diffusion of oxygen. Interdiffusion at coating/substrate interface transformed γ into γ` phase in substrate, precipitating MC carbides. MC carbide underwent progressive disintegration, transforming into M 6C carbide. The results could provide experimental data and theoretical support for the design of long-life protective coatings at ultra-high temperatures.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · Advanced materials and composites · High Entropy Alloys Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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