scholarly journals Oxidation behaviors of carbon fiber reinforced multilayer SiC-Si3N4 matrix composites

2022 ◽  
Vol 11 (2) ◽  
pp. 354-364
Author(s):  
Xiaolin Dang ◽  
Donglin Zhao ◽  
Tong Guo ◽  
Xiaomeng Fan ◽  
Jimei Xue ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Oxidation Resistance ◽  
Chemical Vapor ◽  
Local Stress ◽  
Chemical Vapor Infiltration ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced ◽  
Si3n4 Matrix ◽  
Oxidation Behaviors

AbstractOxidation behaviors of carbon fiber reinforced SiC matrix composites (C/SiC) are one of the most noteworthy properties. For C/SiC, the oxidation behavior was controlled by matrix microcracks caused by the mismatch of coefficients of thermal expansion (CTEs) and elastic modulus between carbon fiber and SiC matrix. In order to improve the oxidation resistance, multilayer SiC-Si3N4 matrices were fabricated by chemical vapor infiltration (CVI) to alleviate the above two kinds of mismatch and change the local stress distribution. For the oxidation of C/SiC with multilayer matrices, matrix microcracks would be deflected at the transition layer between different layers of multilayer SiC-Si3N4 matrix to lengthen the oxygen diffusion channels, thereby improving the oxidation resistance of C/SiC, especially at 800 and 1000 °C. The strength retention ratio was increased from 61.9% (C/SiC-SiC/SiC) to 75.7% (C/SiC-Si3N4/SiC/SiC) and 67.8% (C/SiC-SiC/Si3N4/SiC) after oxidation at 800 °C for 10 h.

Fabrication and Characteristics of Carbon Fiber Reinforced C–SiC Dual Matrix Composites

2007 ◽  
Vol 334-335 ◽  
pp. 145-148 ◽  
Author(s):  
Dong Mei Zhu ◽  
Fa Luo ◽  
Hong Na Du ◽  
Wan Cheng Zhou
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Chemical Vapor ◽  
Chemical Vapor Infiltration ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Final Density ◽  
Carbon Fiber Reinforced ◽  
Sic Composites ◽  
Xylene Solution

A series of carbon fiber reinforced C-SiC dual matrix composites (C/C-SiC composites) were developed through precursor infiltration of polycarbosilane (PCS) and pyrolysis (PIP), using porous C/C composites with different density from chemical vapor infiltration (CVI) as the preform. The density, mechanical properties, and microstructure of the composites were investigated and the effects of the preform density and the PCS concentration of the infiltration solution on the final density and the mechanical properties of the composites were discussed in detail. The results show that the final density of the C/C-SiC composites prepared at the infiltration concentration of 50% is the highest, indicating that 50% is the proper PCS concentration of the PCS/ Xylene solution to prepare the C/C-SiC composites. The final densities of C/C-SiC composites were closely related to the preform density and the highest final density corresponds to the highest original preform density. For the composites prepared using infiltration solution of 50% PCS, the C/C-SiC composite whose preform density is 1.23 g/cm3 possesses the best mechanical properties while that whose preform density is 1.49 g/cm3 the worst mechanical properties.

Preparation and Assessment of C/C-ZrB2-SiC Ultra-High Temperature Ceramics

2012 ◽  
Vol 512-515 ◽  
pp. 719-722 ◽  
Author(s):  
Jie Fan ◽  
Chang Ling Zhou ◽  
Chong Hai Wang ◽  
Yan Yan Wang ◽  
Rui Xiang Liu
Keyword(s):  
High Temperature ◽  
Carbon Fiber ◽  
Thermal Protection ◽  
Chemical Vapor ◽  
Pyrolytic Carbon ◽  
Composite Ceramic ◽  
Chemical Vapor Infiltration ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced ◽  
Ultra High Temperature

With the background of thermal protection applications of anti-oxidation carbon fiber reinforced composites, carbon fiber reinforced ultra-high temperatureceramics with homogeneous disperse complex matrix of C-ZrB2-SiC (C/C-ZrB2-SiC) was prepared. Carbon fiber performs were deposited with pyrolytic carbon by chemical vapor infiltration method. Subsequently, the composite precursors were prepared by completely mutually dissolving of ZrB2 polymeric precursor and polycarbosilane dimethylbenzene solution. Then the nano-dispersed ZrB2-SiC composite ceramic was introduced into the C/C preforms by polymer impregnant and pyrolysis process. The C/C-ZrB2-SiC composite shows excellent ablation behavior with the ablating rate of 8*10-4mm/s. The microstructural and compositional characterizations of the C/C-ZrB2-SiC composites indicates that ZrB2 nanoparticle is distributed homogeneously in the continuous SiC phase, which is beneficial to enhance ultra-high temperature ablation resistance of the composites.

Surface Oxidation of Carbon Fiber and its Influence on the Properties of Carbon Fiber Reinforced BN-Si3N4 Composites

2008 ◽  
Vol 368-372 ◽  
pp. 901-904 ◽  
Author(s):  
Bin Li ◽  
Chang Rui Zhang ◽  
Feng Cao ◽  
Si Qing Wang ◽  
Ying Bin Cao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Three Dimensional ◽  
Surface Oxidation ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Oxidized Carbon ◽  
Carbon Fiber Reinforced ◽  
Si3n4 Matrix

Toray T300 PAN-based carbon fibers were surface oxidized in air at 300, 400 and 500 °C. The composition of surface was determined by X-ray photoelectron spectrometry (XPS), and the monofilaments of original carbon fiber and surface oxidized carbon fibers were tensile tested at room temperature. Three-dimensional carbon fiber reinforced BN-Si3N4 matrix composites were prepared by precursor infiltration and pyrolysis using a hybrid precursor mixed by borazine and perhydropolysilazane. With the increase of the oxidation temperature, the content of size on the surface of fiber reduces, and the tensile strength of carbon fiber declines. Carbon fiber oxidized at 400 °C has a 93% residual strength and the fiber oxidized at 500 °C is seriously decayed. The composite reinforced by original carbon fibers exhibits excellent mechanical properties, including high flexural strength (182.3 MPa) and good toughness; while the composite reinforced by 400 °C oxidized carbon fibers is weak (only 102.4 MPa) and brittle. The distinct difference of mechanical properties between the two composite is attributed to the change of the interfaces between carbon fibers and nitride matrices.

Microstructural tailoring and its influence on oxidation resistance of carbon fiber-reinforced C-SiC matrix composites

2019 ◽  
Vol 45 (2) ◽  
pp. 2044-2052 ◽  
Author(s):  
Jixiang Dai ◽  
Jianjun Sha ◽  
Yufei Zu ◽  
Zhaofu Zhang ◽  
Xue Zou ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Oxidation Resistance ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced
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