Thermal-mechanical driven oxidation of NiCr-Cr3C2-BaF2/CaF2 composite coating at high temperature
Source abstract
Abstract
Long-term oxidation behavior of thermal spray NiCr-Cr 3C 2-BaF 2/CaF 2 composite coating at 800 °C was studied. The existence of fluorides reduces the oxidation resistance of the composite coating. The originally stable BaF 2/CaF 2 segregated and oxidized under thermal-mechanical coupling action at high temperature. An oxide layer containing CaCrO 4 and liquid BaCrO 4 was formed on the surface of the coating through a series of reactions among BaF 2/CaF 2 , NiCr and oxygen. Meanwhile, Voids and gaps were generated in the near surface of the composite coating.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · Advanced materials and composites · Metal and Thin Film Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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