Microstructure, mechanical properties and oxidation resistance of SiCf/SiC composites incorporated with boron nitride nanotubes

RSC Advances ◽  
2016 ◽  
Vol 6 (86) ◽  
pp. 83482-83492 ◽  
Author(s):  
Guangxiang Zhu ◽  
Shaoming Dong ◽  
Dewei Ni ◽  
Chengying Xu ◽  
Dengke Wang
Keyword(s):  
Mechanical Properties ◽  
Chemical Vapor ◽  
Boron Nitride Nanotubes ◽  
Chemical Vapor Infiltration ◽  
Raw Material ◽  
Boron Powder ◽  
Hierarchical Composites ◽  
Sic Composites ◽  
Polymer Impregnation

SiCf/BNNTs–SiC hierarchical composites were fabricated via firstly in situ growth of BNNTs on SiC fibers using boron powder as a raw material and then matrix densification by chemical vapor infiltration and polymer impregnation/pyrolysis methods.

scholarly journals Effect of pyrolytic carbon interphase on mechanical properties of mini T800-C/SiC composites

2021 ◽  
Author(s):  
Donglin Zhao ◽  
Tong Guo ◽  
Xiaomeng Fan ◽  
Chao Chen ◽  
Yue Ma
Keyword(s):  
Mechanical Properties ◽  
Weibull Modulus ◽  
Chemical Vapor ◽  
Pyrolytic Carbon ◽  
Chemical Vapor Infiltration ◽  
Matrix Composites ◽  
Average Strength ◽  
Gas Source ◽  
Maximum Value ◽  
Sic Composites

AbstractThe effect of pyrolytic carbon (PyC) thickness on the tensile property of mini T800 carbon fiber reinforced SiC matrix composites (C/SiC) was studied. PyC interphase was prepared by chemical vapor infiltration (CVI) process using C3H6–Ar as gas source, the PyC thickness was adjusted from 0 to 400 nm, and then the SiC matrix was prepared by CVI process using methyltrichlorosilane (MTS)–H2–Ar as precursor and gas source. The results showed that the tensile strength of mini T800-C/SiC increased first and then decreased with the increase of the PyC thickness. When the thickness of PyC was 100 nm, the average strength reached the maximum value of 393 ± 70 MPa. The Weibull modulus increased from 2.0 to 8.06 with the increase of PyC thickness, and the larger the Weibull modulus, the smaller the dispersion, which indicated that the regulation of PyC thickness was conducive to improve tensile properties.

scholarly journals Effect of Pyrolytic Carbon Interphase on Mechanical Properties of mini T800-C/SiC Composites

2020 ◽  
Author(s):  
Donglin Zhao ◽  
Tong Guo ◽  
X.M. Fan ◽  
Chao Chen ◽  
Yue Ma
Keyword(s):  
Mechanical Properties ◽  
Weibull Modulus ◽  
Chemical Vapor ◽  
Pyrolytic Carbon ◽  
Chemical Vapor Infiltration ◽  
Matrix Composites ◽  
Average Strength ◽  
Gas Source ◽  
Maximum Value ◽  
Sic Composites

Abstract The effect of pyrolytic carbon (PyC) thickness on the tensile property of mini T800-carbon fiber reinforced SiC matrix composites (mini-C/SiC) was studied in this work. PyC interphase was prepared by chemical vapor infiltration (CVI) process using C3H6-Ar as gas source, and the PyC thickness was adjusted from 0 to 400 nm, then the SiC matrix was prepared by CVI process using methyltrichlorosilane (MTS)-H2-Ar as precursor and gas source. The results showed that the tensile strength of mini-C/SiC increased first and then decreased with the increase of the PyC thickness. When the thickness of PyC was 100 nm, the average strength reached the maximum value of 393±70 MPa. The Weibull modulus increased from 2.0 to 8.06 with the increase of PyC thickness, the larger the Weibull modulus, the smaller the dispersion, which indicated that the regulation of PyC thickness is conducive to improve tensile properties.

Application Study of Cf/SiC Composites Screw

2014 ◽  
Vol 602-603 ◽  
pp. 426-429
Author(s):  
Yan Yan Wang ◽  
Wei Wei Wang ◽  
Chang Ling Zhou ◽  
Chong Hai Wang ◽  
Rui Xiang Liu
Keyword(s):  
Mechanical Properties ◽  
Shear Test ◽  
Diamond Tool ◽  
Chemical Vapor ◽  
Chemical Vapor Infiltration ◽  
Application Study ◽  
Double Shear ◽  
Carbon Preform ◽  
Continuous Carbon Fiber ◽  
Sic Composites

Cf/SiC composites were fabricated by chemical vapor infiltration with CH3SiCl3 as precursor and H2 as carrier gas. The carbon preform was noodled by continuous carbon fiber and network tires layer. The screws were processed with Cf/SiC composites by diamond tool. The mechanical properties of screws were studied in this paper. Results show that the tensile and double shear strength reach separately 128.15 Mpa and 58Mpa. The microstructure of fracture surfaces from tensile and shear test were analysized.

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.

scholarly journals Effect of BNNTs/matrix interface tailoring on toughness and fracture morphology of hierarchical SiCf/SiC composites

2019 ◽  
Vol 8 (4) ◽  
pp. 555-563 ◽  
Author(s):  
Guangxiang Zhu ◽  
Qian Feng ◽  
Jinshan Yang ◽  
Jianbao Hu ◽  
Hongda Wang ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Fiber Surface ◽  
Chemical Vapor ◽  
Fracture Morphology ◽  
Interfacial Bonding ◽  
Matrix Interface ◽  
Sic Fiber ◽  
Hierarchical Composites ◽  
Sic Composites

AbstractA thin BN interphase is applied on BNNTs surface to tailor the interfacial bonding between BNNTs and SiC matrix in hierarchical SiCf/SiC composites. The thickness of BN interphase ranging from 10 to 70 nm can be optimized by chemical vapor deposition after BNNTs are in situ grown on SiC fiber surface. Without BN interphase, the fracture toughness of hierarchical SiCf/SiC composites can be impaired by 13.6% due to strong interfacial bonding. As long as BN interphase with 30–45 nm thickness is applied, the interfacial bonding can be optimized and fracture toughness of hierarchical composites can be improved by 27.3%. It implies that tailoring BNNTs/matrix interface by depositing a layer of BN interphase is in favor of activating energy dissipation mechanisms at nanoscale induced by BNNTs.

In situ growth behavior of boron nitride nanotubes on the surface of silicon carbide fibers as hierarchical reinforcements

RSC Advances ◽  
2016 ◽  
Vol 6 (17) ◽  
pp. 14112-14119 ◽  
Author(s):  
Guangxiang Zhu ◽  
Shaoming Dong ◽  
Jianbao Hu ◽  
Yanmei Kan ◽  
Ping He ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Boron Nitride ◽  
Boron Nitride Nanotubes ◽  
Growth Behavior ◽  
Raw Material ◽  
In Situ Growth ◽  
Boron Powder ◽  
Silicon Carbide Fibers ◽  
Annealing Method

BNNTs grown in situ on the surface of silicon carbide fibers via a simplified ball milling, impregnation and annealing method using boron powder as the raw material were synthesized.

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