Chemistry and Kinetics of Heterogeneous Reaction Mechanism for Chemical Vapor Infiltration of Pyrolytic Carbon from Propane

2014 ◽  
Vol 53 (45) ◽  
pp. 17537-17546 ◽  
Author(s):  
Z. P. Tang ◽  
A. J. Li ◽  
Z. W. Zhang ◽  
X. Ma ◽  
W. Wang ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Heterogeneous Reaction ◽  
Chemical Vapor ◽  
Pyrolytic Carbon ◽  
Chemical Vapor Infiltration ◽  
Kinetics Of ◽  
Vapor Infiltration

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

2006 ◽  
Vol 11-12 ◽  
pp. 81-84 ◽  
Author(s):  
Dong Lin Zhao ◽  
Hong Feng Yin ◽  
Fa Luo ◽  
Wan Cheng Zhou
Keyword(s):  
Mechanical Property ◽  
Silicon Carbide ◽  
Carbon Fiber ◽  
Interfacial Layer ◽  
Chemical Vapor ◽  
Pyrolytic Carbon ◽  
Chemical Vapor Infiltration ◽  
Sic Composites ◽  
Microstructure And Mechanical Property ◽  
Vapor Infiltration

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.

Textures of pyrolytic carbon formed in the chemical vapor infiltration of capillaries

Carbon ◽  
2003 ◽  
Vol 41 (1) ◽  
pp. 97-104 ◽  
Author(s):  
M Guellali ◽  
R Oberacker ◽  
M.J Hoffmann ◽  
W.G Zhang ◽  
K.J Hüttinger
Keyword(s):  
Chemical Vapor ◽  
Pyrolytic Carbon ◽  
Chemical Vapor Infiltration ◽  
Vapor Infiltration

Complex Permittivity of 3D Textile SiC/C/SiC Composites Fabricated by Chemical Vapor Infiltration at X-Band Frequency

2008 ◽  
Vol 368-372 ◽  
pp. 1028-1030 ◽  
Author(s):  
Dong Lin Zhao ◽  
Hong Feng Yin ◽  
Yong Dong Xu ◽  
Fa Luo ◽  
Wan Cheng Zhou
Keyword(s):  
Complex Permittivity ◽  
Three Dimensional ◽  
Chemical Vapor ◽  
Pyrolytic Carbon ◽  
Chemical Vapor Infiltration ◽  
Band Frequency ◽  
Sic Fiber ◽  
X Band ◽  
Sic Composites ◽  
Vapor Infiltration

Three-dimensional textile SiC fiber reinforced SiC composites with pyrolytic carbon interfacial layer (3D-SiC/C/SiC) were fabricated by chemical vapor infiltration. The microstructure and complex permittivity of the 3D textile SiC/C/SiC composites were investigated. The flexural strength of the 3D textile SiC/C/SiC composites was 860 MPa at room temperature. The real part (ε′) and imaginary part (ε″) of the complex permittivity of the 3D-SiC/C/SiC composites are 9.11~10.03 and 4.11~4.49, respectively at the X-band frequency. The 3D-SiC/C/SiC composites would be a good candidate for structural microwave absorbing material.

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