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Research Article | Open Access

3D Cf/SiBCN composites prepared by an improved polymer infiltration and pyrolysis

Qi DINGa,b,c,d, Dewei NIa,b( ), Zhen WANGa,b, Hao ZHONGa,b, Hongda WANGa,b, Haijun ZHOUa,b, Yanmei KANa,b, Shaoming DONGa,b( )
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
University of Chinese Academy of Sciences, Beijing 100049, China
ShanghaiTech University, Shanghai 201210, China
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Abstract

Using liquid poly(methylvinyl)borosilazanes (PMVBSZ) as precursor, carbon fiber reinforced SiBCN matrix composites (Cf/SiBCN) were fabricated by a modified polymer infiltration and pyrolysis (PIP) process. With dicumyl peroxide added as cross-linking agent, the PMVBSZ could be solidified at a low temperature of 120 ℃, leading to a high ceramic yield of ~70%. The cross-linking mechanism and ceramization processes of the precursor were investigated in detail. Moreover, a modified infiltration technology was developed, which improved the efficiency and protected the precursor against moist air during PIP. Consequently, the obtained Cf/SiBCN composites had an oxygen content of around 1.22 wt%. Benefiting from the high ceramic yield and high efficiency of the modified PIP, Cf/SiBCN composites with an open porosity of ~10% and uniform microstructure were obtained after only 7 cycles of PIP. The flexural strength and fracture toughness of the derived Cf/SiBCN composites were 371 MPa and 12.9 MPa·m1/2, respectively. This work provides a potential route for the fabrication of high performance Cf/SiBCN composites.

Keywords

Cf/SiBCNceramic matrix composites (CMCs)polymer infiltration and pyrolysis (PIP)dicumyl peroxide (DCP)

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Journal of Advanced Ceramics
Volume 7 Issue 3,
September 2018
Pages 266-275
DOI: 10.1007/s40145-018-0278-0
Cite this article:
DING Q, NI D, WANG Z, et al. 3D Cf/SiBCN composites prepared by an improved polymer infiltration and pyrolysis. Journal of Advanced Ceramics, 2018, 7(3): 266-275. https://doi.org/10.1007/s40145-018-0278-0

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Received: 13 December 2017
Revised: 29 March 2018
Accepted: 25 April 2018
Published: 10 October 2018
© The author(s) 2018

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