Abstract
Carbon fiber-reinforced silicon carbonitride ceramic matrix composites (C/SiCN) were prepared by rapid electro-thermal pyrolysis CVD using liquid polymer hexamethyldisilazane (HMDS, (CH3)3SiNHSi(CH3)3) as precursor. Microstructure morphology and production technique of C/SiCN composites were investigated. Scanning electron microscopy and transmission electron microscopy were respectively employed to characterize microstructures of the as-received C/SiCN composites samples. The high temperature pyrolysis of HMDS results in destruction of molecular chain, fracture of bonds, as well as liquid-gas-solid conversion from polymer to ceramic. Microstructures observation indicates that there is a high degree of coalescence between SiCN matrix and C fiber. The deposition model of liquid precursor electro-thermal pyrolysis CVD is different from that of gas precursor isothermal chemical vapor infiltration. Rapid liquid flow and slow gas diffusion are key factors for the difference of two methods. Preparation of rapid electro-thermal pyrolysis CVD consists of four steps including liquid polymer infiltration, polymer pyrolysis, rapid deposition of pyrolyzed substances and rapid densification, respectively.
Similar content being viewed by others
References
Liu WC, Wei YL, Deng JY. Carbon-fiber-reinforced C-SiC Binary Matrix Composites [J]. Carbon, 1995, 33(4): 441–447
Lee SH, Weinmann M, Aldinger F. Processing and Properties of C/Si-B-C-N Fiber-reinforced Ceramic Matrix Composites Prepared by Precursor Impregnation and Pyrolysis[J]. Acta Mater., 2008, 569(7): 1 529–1 538
Huang KM, Li WX, Xie BH, et al. Preparation and Mechanical Properties of Al2O3/Al Laminated Ceramic Matrix Composites[J]. Journal of Wuhan University of Technology-Mater. Sci. Ed., 2011, 26(5): 891–896
Grenet C, Plunkett L, Veyret JB, et al. Carbon Fiber-reinforced Silicon Nitride Composites by Slurry Infiltration[J]. Ceram. Trans., 1995, 58: 125–130
Krenkel W. Cost Effective Processing of CMC Composites by Melt Infiltration (LSI-process) [J]. Ceram. Eng. Sci. Proc., 2001, 22(3):443–454
Kleebe HJ, Suttor D, Müller H, et al. Decomposition-crystallization of Polymer-derived Si-C-N Ceramics[J]. J. Am. Ceram. Soc., 1998, 81(11): 2 971–2 977
Schmidt H, Borchardt G, Müller A, et al. Formation Kinetics of Crystalline Si3N4/SiC Composites from Amorphous Si-C-N Ceramics [J]. J. Non-Cryst. Solids, 2004, 341(1–3): 133–140
Schiavon MA, Sorarù GD, Yoshida IVP. Synthesis of a Polycyclic Silazane Network and Its Evolution to Silicon Carbonitride Glass [J]. J. Non-Cryst. Solids, 2002, 304(1–3): 76–83
Mocaer D, Pailler R, Naslain R, et al. Si-C-N Ceramic with a High Microstructural Stability Elaborated from the Pyrolysis of New Polycarbosilazane Precursors: IV. Oxygen-free Model Monofilaments[J]. J. Mater. Sci., 1993, 28(11): 3 049–3 058
Lee SS, Zawada LP, Staehler JM, et al. Mechanical Behavior and High-Temperature Performance of a Woven Nicalon™/Si-N-C Ceramicmatrix Composite[J]. J. Am. Ceram. Soc., 1998, 81(7): 1 797–1 811
Sato K, Morozumia H, Funayama O, et al. Mechanical Properties and Oxidation Resistance of C-B-Si Coated Silicon Nitride Fiber Reinforced Si-N-C Composites with Cross-ply Structure[J]. Composites: Part A, 1999, 30(4): 577–581
Zheng WW, Chen ZH, Ma QS, et al. Influence of Heating Rate on the Microstructure and Mechanical Properties of Carbon Fiber/Si-C-N Composites Via Polysilazane Pyrolysis[J]. J. Mater. Sci., 2004, 39(10): 3 521–3 522
Cao HC, Bischoff E, Sbaizero O, et al. Effect of Interfaces on the Properties of Fiber-reinforced Ceramics [J]. J. Am. Ceram. Soc., 1990, 73(6):1691–1699
Hutchinson JW, Jensen HM. Models of Fiber Debonding and Pull-out in Brittle Composites with Friction[J]. Mech. Mater., 1990, 9:139–163
Cheng LF, Xu YD, Zhang LT, et al. Oxidation Behavior of Three Dimensional C/SiC Composites in Air and Combustion Gas Environments[J]. Carbon, 2000, 38(15): 2 103–2 108
Zhong JH. Research on Preparation and Representative Performance of Three C/Si-C-N Composites with Different Interlayers [D]. Polytechnical University, 2007
Bharadwaj L, Fan Y, Zhang L, et al. Oxidation Behavior of A Fully Dense Polymer-derived Amorphous Silicon Carbonitride Ceramic[J]. J. Am. Ceram. Soc., 2004, 87(3): 483–486
Izumi A, Oda K. Deposition of SiCN Films Using Organic Liquid Materials by HWCVD Method[J]. Thin Solid Films, 2006, 501(1–2): 195–197
Naslain R. CVI Composites[M]. Warren Red. Ceramic Matrix Composites. London: Chapmen and Hall, Blackie, 1992: 199–244
Author information
Authors and Affiliations
Corresponding author
Additional information
Funded by the National Natural Science Foundation of China (No. 50772089), and the Program of Introducing Talents of Discipline in the Project of Advanced Materials and their Forming Technology (B08040)
Rights and permissions
About this article
Cite this article
Xia, Y., Qiao, S. & Wang, Q. Microstructure and deposition mechanism of C/SiCN composites prepared by rapid electro-thermal pyrolysis CVD. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 28, 688–692 (2013). https://doi.org/10.1007/s11595-013-0753-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11595-013-0753-y