Oxidation behavior of plasma sprayed Al@NiCr with cyclic thermal treatment at different temperatures
Source abstract
Abstract
Freestanding and inhomogeneous coating was prepared by atmospheric plasma spray using Al@NiCr powder. Oxidation kinetics and mechanism are discussed after cyclic oxidation in air. Slight interdiffusion occurred at 800 degrees C but oxidation process took a dominant position at higher temperature. The oxidation of Cr turned significant above 1100 degrees C and volatilized as CrO3. The oxidation of Ni also became severe at 1100 degrees C. The oxidation was suppressed when internal channels were filled up with oxides. Then two stages for oxidation appeared, both of which obeyed parabolic rate law. The slow oxidation of external surface played a key role at the second stage. (C) 2011 Elsevier Ltd. All rights reserved.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · Catalytic Processes in Materials Science · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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