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Research Article
Shoujun Wu
Northwest Agriculture and Forestry University
Corresponding Author
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Oxidation behavior of a Cr3Si-Cr7C3/SiC/SiC coated C/SiC composite was investigated in wet air at 700, 900 and 1300 ºC under 1 atm with a gas velocity of 3.0 cm s-1, and compared with that of a SiC/SiC/SiC coated C/SiC composite. The wet oxidation produced phases on the Cr3Si-Cr7C3/SiC/SiC coating were Cr2O3 at 700 and 900 ºC, and Cr2O3 and SiO2 at 1300 ºC. The Cr3Si-Cr7C3/SiC/SiC coating showed enhanced protection against wet oxidation compared to the SiC/SiC/SiC coating. After oxidation for 10 h, the Cr3Si-Cr7C3/SiC/SiC coated composites showed nearly the same failure behavior and residual flexural strength as the as-received composites.
Keywords
C/SiC, Cr3Si-Cr7C3, Wet Oxidation, Coating, Flexural strength, Microstructure
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This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Research Article
Shoujun Wu
Northwest Agriculture and Forestry University
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 30 Jun, 2020
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Ceramics
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Oxidation behavior of a Cr3Si-Cr7C3/SiC/SiC coated C/SiC composite was investigated in wet air at 700, 900 and 1300 ºC under 1 atm with a gas velocity of 3.0 cm s-1, and compared with that of a SiC/SiC/SiC coated C/SiC composite. The wet oxidation produced phases on the Cr3Si-Cr7C3/SiC/SiC coating were Cr2O3 at 700 and 900 ºC, and Cr2O3 and SiO2 at 1300 ºC. The Cr3Si-Cr7C3/SiC/SiC coating showed enhanced protection against wet oxidation compared to the SiC/SiC/SiC coating. After oxidation for 10 h, the Cr3Si-Cr7C3/SiC/SiC coated composites showed nearly the same failure behavior and residual flexural strength as the as-received composites.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
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