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Al4SiC4 is one of the nanolayered-ternary compounds with excellent properties such as oxidation and corrosion resistance at high temperatures, and we have paid attention to Al4SiC4 to be applied for ceramic matrix composites (CMC) as novel materials for aircraft jet engines instead of SiC. In this study, oxidation test of Al4SiC4-based ceramics with SiC fabricated by hot-pressing was conducted at 1623K for 12-100 h in air, and their oxidation behavior was investigated. After oxidation test, Al4SiC4-based ceramics had oxidation layer with a dual-layered structure in 50vol% Al4SiC4/50vol% SiC (Al4SiC4-50), four- and six-layered structure in monolithic Al4SiC4 (Al4SiC4-100), and these oxidation layers contained Al2O3, SiO2 and mullite. The thickness of the oxidation layer in Al4SiC4-based ceramics increased with the oxidation time and the content of Al4SiC4, and obeyed the parabolic rate law. The schematic models of oxidation behavior of Al4SiC4-based ceramics with SiC were proposed based on the results of the oxidation test. In conclusions, the addition of SiC to Al4SiC4 enhanced the formation of mullite, which would act as the protective layer, and Al4SiC4-based ceramics with SiC are expected to be one of the promising materials instead of SiC.

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• In Copyright
  

Keyword: Al4SiC4Al4SiC4

Date published: 2025-03-31

Publisher: The Atomic Energy Society of Japan

Journal:

• Progress in Nuclear Science and Technology (ISSN: 21854823) vol. 7 p. 228-234

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Manuscript type: Publisher's version (Version of record)

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First published URL: https://doi.org/10.15669/pnst.7.228

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Updated at: 2025-05-08 16:30:10 +0900

Published on MDR: 2025-05-08 16:24:29 +0900