A multi-scale prediction model of elastic modulus for ceramic matrix composites considering oxidation damage

LI Jintao; WANG Bo; YANG Yang; ZHANG Chengyu

doi:10.13801/j.cnki.fhclxb.20210629.002

Volume 38 Issue 10

Oct. 2021

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LI Jintao, WANG Bo, YANG Yang, et al. A multi-scale prediction model of elastic modulus for ceramic matrix composites considering oxidation damage[J]. Acta Materiae Compositae Sinica, 2021, 38(10): 3432-3442. doi: 10.13801/j.cnki.fhclxb.20210629.002

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LI Jintao, WANG Bo, YANG Yang, et al. A multi-scale prediction model of elastic modulus for ceramic matrix composites considering oxidation damage[J]. Acta Materiae Compositae Sinica, 2021, 38(10): 3432-3442. doi: 10.13801/j.cnki.fhclxb.20210629.002

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A multi-scale prediction model of elastic modulus for ceramic matrix composites considering oxidation damage

doi: 10.13801/j.cnki.fhclxb.20210629.002

LI Jintao^1
,,
WANG Bo^{1, 2
,
,},
YANG Yang^1
,,
ZHANG Chengyu³

1.
School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
2.
Shaanxi Key Laboratory of Impact Dynamics and Engineering Applications, Xi’an 710072, China
3.
School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China

Received Date: 2021-04-23
Accepted Date: 2021-06-21

Available Online: 2021-06-29

Publish Date: 2021-10-01

Abstract

Abstract

The oxidation damage evolution law of ceramic matrix composites prepared by chemical vapor infiltration (CVI) process was analyzed. Considering the effects of temperature and oxidation time, prediction models of elastic modulus about fiber and cell were established based on the distribution of microcracks in matrix and the oxidation process of interface, fiber and matrix. The prediction results show that the tensile elastic moduli of carbon fiber (C_f)/SiC and SiC fiber (SiC_f)/SiC composites decrease more obviously with the increase of temperature and oxidation time. The elastic prediction model was verified by the tensile tests of the composites after high temperature oxidation. The error between the prediction results and the test results of SiC_f/SiC composites with BN interphase after oxidation at 1000 ℃ for different time is no more than 2%, and the error between the prediction results and the test results of C_f/SiC composites with PyC interphase after oxidation at 700℃ for different time is no more than 7%.
- ceramic matrix composites,
- chemical vapor infiltration (CVI),
- oxidation,
- multi-scale,
- elastic modulus
Long Abstrsct
Innovation Points

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References(29)

References

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