Critical Review of the Oxidation of Cr2AlC

Dong Bok Lee

doi:10.4028/www.scientific.net/AST.89.115

Paper Titles

Fracture Mechanics of Y₂O₃ Ceramics at High Temperatures
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Development of Cordierite Ceramics from Natural Raw Materials
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First Principles Calculations of Interfaces in Ultra High Temperature Ceramics
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Influence of B₄C, SiC and Si₃N₄ Additions on Microstructures and Selected Properties of Titanium Nitride Matrix Materials Obtained by HPHT Method
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Critical Review of the Oxidation of Cr₂AlC
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Study of the Thermal Stability and Mechanical Characteristics of MAX Phases of Ti-Al-C(N) System and their Solid Solutions
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Heat-Resistant Inorganic Fibers
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Poly-Siloxane Impregnation and Pyrolysis of Basalt Fibers for the Cost-Effective Production of CFCCs
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Multilayered Fiber-Reinforced Oxide Composites Produced by Lamination of Thermoplastic Prepregs
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HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 89Critical Review of the Oxidation of Cr2AlC

Critical Review of the Oxidation of Cr₂AlC

Abstract:

The Cr₂AlC ternary compounds were synthesized via a powder metallurgical route, and their oxidation behavior was investigated at 700-1300°C in air for up to 360 days. A thin Al₂O₃ layer always formed on the surface. Since Al was consumed to produce the Al₂O₃ layer, Al-depletion and Cr-enrichment occurred underneath the Al₂O₃ layer. This led to the formation of a Cr₇C₃ sublayer containing some voids. Up to 1000 °C, the Al₂O₃ layer effectively improved the oxidation resistance. Above 1100 °C, the Al₂O₃ layer began to crack and spall locally to a certain extent. At 1300 °C, the oxidation resistance became poor owing to the formation of voids in the Cr₇C₃ sublayer and the spallation of the Al₂O₃ scales.