Isothermal oxidation behavior and microstructure change of a gradient low-expansion coating for superalloys
Source abstract
Abstract
Abstract An AlN gradient-doped Ni + CrAlYSiHfN coating was prepared on superalloys by magnetron sputtering. The as-deposited coating comprised of three sub-layers. AlN phase shows a gradient distribution in coating after annealing, and AlN reaches 33 vol.% at the top of the coating. Compared with NiCrAlY coating, the gradient coating reduced the CTEs mismatch between coating and α-Al2O3 by 41%, and it exhibited a much lower oxidation rate in oxidation test. A thin Cr23C6 diffusion barrier formed at the coating-substrate interface. In summary, the gradient coating effectively reduces the damage of thermal stress on oxide scale, and suppressed the interdiffusion between coating and substrate.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Metal and Thin Film Mechanics · High Entropy Alloys Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (45)
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