Effect of mass transfer channels on flexural strength of C/SiC composites fabricated by femtosecond laser assisted CVI method with optimized laser power

Jing WANG; Liyang CAO; Yunhai ZHANG; Yongsheng LIU; Hui FANG; Jie CHEN

doi:10.1007/s40145-020-0433-2

Journal of Advanced Ceramics 2021, 10(2): 227-236 https://doi.org/10.1007/s40145-020-0433-2

Research Article |

Open Access | Issue | Published: 10 February 2021

Effect of mass transfer channels on flexural strength of C/SiC composites fabricated by femtosecond laser assisted CVI method with optimized laser power

Show Author's Information Hide Author's Information Jing WANG^{^†}, Liyang CAO^{^†}, Yunhai ZHANG, Yongsheng LIU(

), Hui FANG, Jie CHEN

Science and Technology on Thermostructural Composites Materials Laboratory, Northwestern Polytechnical University, Xi’an 710072, China

† Jing Wang and Liyang Cao contributed equally to this work.

Keywords:

C/SiC, laser assisted-chemical vapor infiltration (LA-CVI), mass transfer channels, laser power, flexural strength

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WANG J, CAO L, ZHANG Y, et al. Effect of mass transfer channels on flexural strength of C/SiC composites fabricated by femtosecond laser assisted CVI method with optimized laser power. Journal of Advanced Ceramics, 2021, 10(2): 227-236. https://doi.org/10.1007/s40145-020-0433-2

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Abstract

In this study, femtosecond laser assisted-chemical vapor infiltration (LA-CVI) was employed to produce C/SiC composites with 1, 3, and 5 rows of mass transfer channels. The effect of laser machining power on the quality of produced holes was investigated. The results showed that the increase in power yielded complete hole structures. The as-obtained C/SiC composites with different mass transfer channels displayed higher densification degrees with flexural strengths reaching 546 ± 15 MPa for row mass transfer channel of 3. The strengthening mechanism of the composites was linked to the increase in densification and formation of "dense band" during LA-CVI process. Multiphysics finite element simulations of the dense band and density gradient of LA-CVI C/SiC composites revealed C/SiC composites with improved densification and lower porosity due to the formation of "dense band" during LA-CVI process. In sum, LA-CVI method is promising for future preparation of ceramic matrix composites with high densities.

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Effect of mass transfer channels on flexural strength of C/SiC composites fabricated by femtosecond laser assisted CVI method with optimized laser power

Show Author's information Hide Author's Information Jing WANG^{^†}, Liyang CAO^{^†}, Yunhai ZHANG, Yongsheng LIU(

), Hui FANG, Jie CHEN

Science and Technology on Thermostructural Composites Materials Laboratory, Northwestern Polytechnical University, Xi’an 710072, China

† Jing Wang and Liyang Cao contributed equally to this work.

Abstract

Keywords: C/SiC, laser assisted-chemical vapor infiltration (LA-CVI), mass transfer channels, laser power, flexural strength

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Publication history

Received: 16 August 2020

Revised: 23 September 2020

Accepted: 26 October 2020

Published: 10 February 2021

Issue date: April 2021

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Acknowledgements

The authors acknowledge the support from the National Natural Science Foundation of China (Nos. 51972269 and 51672217), the Fundamental Research Funds for the Central Universities (No. 3102019ghxm014), and the Creative Research Foundation of the Science and Technology on Thermostructural Composite Materials Laboratory (No. JCKYS2020607001).

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