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Fan Q.-G.,Xian Aerospace Composite Material Institute | Cui H.,Xian Aerospace Composite Material Institute | Yan L.-S.,Xian Aerospace Composite Material Institute | Zhang Q.,Xian Aerospace Composite Material Institute | And 2 more authors.
Wuji Cailiao Xuebao/Journal of Inorganic Materials | Year: 2013

The ultra-high-temperature composites C/C-SiC-ZrB2 were prepared by slurry impregnation method. The composites consist of the carbon fiber as the reinforced phase, C and SiC as the matrix, and the micro-particle ZrB2 as the ultra high temperature phase. The ablation resistance properties of the composites were assessed by arc wind tunnel testing. The ablation mechanism was studied through XRD, SEM and EDS measurements. The results indicate that compared with C/C-SiC composites, the C/C-SiC-ZrB2 composites show better ablation resistance properties, and the properties increases with the content of ZrB2 increase. A ZrO2-SiO2 glassy melting layer formed at high temperature plays an important role in antioxidant ablation.

Li G.-C.,Yantai Naval Aeronautical and Astronautical University | Liu Z.-Q.,The 92155st Unit of PLA | Zhang X.,Xian Aerospace Composite Material Institute | Qiu X.,Yantai Naval Aeronautical and Astronautical University | Sui Y.-T.,Yantai Naval Aeronautical and Astronautical University
Hanneng Cailiao/Chinese Journal of Energetic Materials | Year: 2013

The tensile deformation and fracture behavior of composite solid propellant were observed by in-situ scanning electron microscopy. The obtained microscopy images under different phase were analyzed by Digital Image Correlation Method(DICM). The microscopic deformation field and failure characteristics of composite solid propellants were obtained. The results show that DICM coupling with SEM is a ideal approach to measure and study the failure of propellant on a grain scale and it can provide the experimental evidence for numerical simulation.

Zhang Q.,Northwestern Polytechnical University | Zhang Q.,Xian Aerospace Composite Material Institute | Zhao J.,Northwestern Polytechnical University | Cui H.,Northwestern Polytechnical University | And 5 more authors.
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | Year: 2016

C/C-ZrB2-SiC composites were prepared by combination of chemical vapor infiltration (CVI) and precursor infiltration and pyrolysis (PIP) process. A mixture of ZrB2 polymeric precursor (PBZ) and polycarbosilane (PCS) was introduced as precursor of ZrB2-SiC matrix. The mechanical properties and ablation properties of the composites were investigated. The results show that the tensile, flexural and shear strengths of the C/C-ZrB2-SiC composites reaches to 91.2, 214, and 35.8 MPa, respectively, higher than that of counterpart prepared by slurry infiltration (SI) process. The ablation behavior of the C/C-ZrB2-SiC composites was studied by oxyacetylene torch test at a heat flux of 3 200 kW/m2 for 600 s. C/C-ZrB2-SiC composites have an average mass ablation rate of 0.002 mm/s and an average linear ablation rate of 0.7 mg/s, which indicate that the composite possesses well resistance to ablation and oxidation. © 2016, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.

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