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Jin B.-H.,Shenyang Aerospace University | Jin B.-H.,Liaoning Key Laboratory for Advanced Composite Material Manufacture Technology | Gao Y.,Shenyang Aerospace University | Gao Y.,Liaoning Key Laboratory for Advanced Composite Material Manufacture Technology | And 4 more authors.
Guti Huojian Jishu/Journal of Solid Rocket Technology | Year: 2014

SiC was deposited on the surface of Si substrate by chemical vapor deposition technique, with methyltrichlorosilane(MTS)as the SiC gaseous source and H2 as carrier gas respectively. The effects of the free carbon on microstructure of SiC film were investigeted by X-ray diffraction(XPS), X-ray diffraction(XRD), scanning electron microscop(SEM) and high resolution transmission electron microscope(HRTEM). The results indicate that the SiC/C composite film is consisted of SiC grains and amorphous carbon mixed some graphite crystallites, which can reduce the grain size of SiC. In addition, the free carbon within SiC film was detected in the gap of SiC grains. The changes in microstrure can increase the mechanical strength of SiC film and improve the SiC/Si crystal lattice matching.


Jin B.-H.,Shenyang Aerospace University | Jin B.-H.,Liaoning Key Laboratory for Advanced Composite Material Manufacture Technology | Wang B.-C.,Shenyang Aerospace University | Wang B.-C.,Liaoning Key Laboratory for Advanced Composite Material Manufacture Technology | And 2 more authors.
Guti Huojian Jishu/Journal of Solid Rocket Technology | Year: 2012

Styrene was used as reactive diluent to decrease the viscosity of Bismaleimide (BMI) resin modified by Diallylbisphenol A(DABPA). T700/BMI composite materials were prepared as testing samples, which are made up of the carbon fiber (T700) as reinforcing material and modified BMI resin as matrix. In order to investigate the effects of styrene content in matrix on the hydro-thermal properties of the sample, the moisture absorptions were measured for the samples in 70°C water, and their mechanical properties were tested too. The results show that moisture absorption of the sample can be decreased with increasing styrene content, and the higher styrene content is responsible for the higher retentions in tensile, flexure and lamellar shear strengths for the sample. However the tensile strength of sample declines when styrene content exceeds 20% (mol%) in matrix.

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