Microstructure and Mechanical Property of 3D Textile C/SiC Composites Fabricated by Chemical Vapor Infiltration

Zhao, Dong Lin; Yin, Hong Feng; Luo, Fa; Zhou, Wan Cheng

doi:10.4028/www.scientific.net/AMR.11-12.81

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Thermo-Chemical Reactions of Modified PAN Fibers during Heat-Treatment Process
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Processing Defects and Nanoindentation Mechanical Properties in Tape Cast Alumina/Zirconia/Mullite Layered Composites
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Microstructure and Mechanical Property of 3D Textile C/SiC Composites Fabricated by Chemical Vapor Infiltration
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HomeAdvanced Materials ResearchAICAM 2005Microstructure and Mechanical Property of 3D...

Microstructure and Mechanical Property of 3D Textile C/SiC Composites Fabricated by Chemical Vapor Infiltration

Abstract:

Three dimensional textile carbon fiber reinforced silicon carbide (3D textile C/SiC) composites with pyrolytic carbon interfacial layer were fabricated by chemical vapor infiltration. The microstructure and mechanical property of 3D textile C/SiC composites were investigated. A thin pyrolysis carbon layer (0.2 ± μm) was firstly deposited on the surface of carbon fiber as the interfacial layer with C3H6 at 850°C and 0.1 MPa. Methyltrichlorosilane (CH3SiCl3 or MTS) was used for the deposition of the silicon carbide matrix. The conditions used for SiC deposition were 1100°C, a hydrogen to MTS ratio of 10 and a pressure of 0.1 MPa. The density of the composites was 2.1 g cm-3. The flexural strength of the 3D textile C/SiC composites was 438 MPa. The 3D textile C/SiC composites with pyrolytic carbon interfacial layer exhibit good mechanical properties and a typical failure behavior involving fibers pull-out and brittle fracture of sub-bundle. The real part (ε′) and imaginary part (ε″) of the complex permittivity of the 3D-C/SiC composites are 51.53-52.44 and 41.18-42.08 respectively in the frequency range from 8.2 to 12.4 GHz. The 3D-C/SiC composites would be a good candidate for microwave absorber.

Info:

Periodical:

Advanced Materials Research (Volumes 11-12)

Main Theme:

AICAM 2005

Edited by:

Masayuki Nogami, Riguang Jin, Toshihiro Kasuga and Wantai Yang

Pages:

81-84

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.11-12.81

Citation:

D. L. Zhao et al., "Microstructure and Mechanical Property of 3D Textile C/SiC Composites Fabricated by Chemical Vapor Infiltration", Advanced Materials Research, Vols. 11-12, pp. 81-84, 2006

Online since:

February 2006

Authors:

Dong Lin Zhao, Hong Feng Yin, Fa Luo, Wan Cheng Zhou

Keywords:

3D Textile, C/SiC Composite, Ceramic Matrix Composite (CMC), Chemical Vapor Infiltration

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References

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[20] [30] [40] [50] [60] [70] [80] 8 9 10 11 12 13 f /GHz ε' ε.

0. 2 0. 4 0. 6 0. 8.

[1] tgδ ε' ε" tgδ Fig. 6. The ε', ε" and tgδ of 3D-C/SiC composites versus frequency Fig. 5. Stress-displacement curve for 3D C/SiC composites.

100 200 300 400 500 0 0. 5 1 1. 5 2 2. 5 3 Displacement / mm Stress / MPa.

Paper TitlePages

Effect of Carbon Black Addition on Reaction-Bonded Silicon Carbide Ceramics

Authors: Joo Sun Kim, H.W. Jun, Huesup Song, Jong Ho Lee, Hai Won Lee

Abstract: High strength reaction-bonded silicon carbide ceramics was successfully produced by reducing the amount of residual silicon and the silicon pocket size with carbon black as an additional carbon source. A prototype of wafer carrier was also produced in near-net dimension by planar contact infiltration of molten silicon into a preform joined with six pieces of simple shape by eliminating process shrinkages. Forming shrinkages were decreased to a negligible level by compression molding, while sintering shrinkage was eliminated by reactive infiltration of molten silicon.

189

SiC/Si - MoSi₂ /MoSi₂ Oxidation Protective Coating for Carbon Material at 1700°C

Authors: Ju An Zhao

Abstract: A multi-layer coating SiC/ Si - MoSi2 /MoSi2 with good oxidation resistance has been developed by using the slurry-sintering method on the surface of graphite to improve the oxidation resistance performance at 1700 °C for more than 200 h. Microstructure and anti-oxidation property of the as-received coating were investigated. It was found that functionally gradient SiC/ Si - MoSi2 /MoSi2 coating was formed on the surface of the graphite substrate. The coating characterized by excellent thermal shock resistance can effectively protect the graphite from oxidation at 1700 °C for 200 h. The mechanism of the oxidation resistance of the coated graphite is also dicussed, and a dense SiO2 layer was formed on the surface of coating at 1700°C during the isotheral oxidation, which can protect graphite from oxidation at longer time.

Influence of Carbon Fiber Pre-Treatments on Interlaminar Shear Strength and Fracture Behavior of C/C Composites

Authors: Wan Chang Sun, He Jun Li, Qian Gang Fu, Shou Yang Zhang

Abstract: PAN-carbon fibers were pretreated using three methods. 2D-C/C composites were fabricated by a rapid chemical liquid-vaporized infiltration (CLVI) processing. Surface morphologies of carbon fiber pretreated and fracture micrographs of 2D-C/C composites were observed by scanning electron microscopy (SEM) and high resolution transmission electron microscope (HRTEM). The interlaminar shear strength(ILSS) of C/C composites was tested. The influences of carbon fiber surface pretreatments on ILSS and fracture behaviors of C/C composites were analyzed. The experimental results indicated that the C/C composite with carbon fiber coated CVI pyrocarbon possesses both higher flexural strength and interlaminar shear strength than composites with other fiber pretreatments. The fractographes revealed the differences in the mechanical behavior depending on the interface strength of fiber/matrix.

482

Fatigue of Nanotube-Reinforced Carbon Fiber Epoxy Composites

Authors: Ying Cao, Li Pan

Abstract: In the present investigation, resin transfer molding has been used to produce high quality carbon fiber epoxy composites and nanotube-reinforced carbon fiber epoxy composites. To study the influence of carbon nanotubes (CNTs) on improving the mechanical properties and fatigue life, the tension-tension fatigue test has been carried out on those two kinds of material in the fiber direction. The damage mechanism in the fiber directions was analyzed by X-ray radiography and electron microscopy. The results show that CNTs pulled out, rapture and bridged cracks during the test, the results also show that CNTs possess an obvious potential on improving the property of carbon fiber epoxy composite, especially for properties that dominated by matrix.

753

Research of Fiber Radar Absorbing Materials

Authors: Sai Nan Wei, Rui Zhou Li, Li Chen, Ji Ming Yao

Abstract: Electromagnetic parameters and absorbing properties of fiber absorbents (carbon fiber, SiC fiber and polycrystalline iron fiber) were introduced. The influences of the arrangement, thickness and content of the fibers on radar absorbing property were summarized. New development directions of the fiber absorbents were also indicated.

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