The influence of Cr on the oxidation behavior of a sputtered Pt+γ’ phase-equilibrium coating at 1150 ℃
Source abstract
Abstract
Two sputtered phase-equilibrium coating (Pt+γ’ and Pt-Cr+γ’ coating) were manufactured in this work. No TCPs appeared around the interface of coating/superalloy after being oxidized at 1150 ℃ for 1000 h. The addition of chromium changes the oxidation kinetics of Pt-Cr+ γ’ coating both in transient and steady oxidation stage. In transient-oxidation stage, chromium accelerates the transition of aluminum oxide from θ-Al 2O 3 to α-Al 2O 3 , which lowers the compressive stress in oxide scale. The presence of Cr in coating also refines the grain size of α-Al 2O 3 scale, which leads to a higher growth rate in the later steady oxidation-stage.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · Nuclear Materials and Properties · Catalytic Processes in Materials Science
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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