硅酸盐学报

C/C–ZrB2–SiC复合材料的制备及其力学性能

单位：1. 西北工业大学材料学院西安 710072 2. 西安航天复合材料研究所西安 7l0025

分类号：TB332

出版年,卷(期):页码：2016,44(7):1002-1007

DOI：

摘要：

结合化学气相渗透工艺与前驱体浸渍裂解(precursor infiltration and pyrolysis, PIP)工艺，制备了C/C–ZrB2–SiC复合材料，并对材料的力学性能和烧蚀性能进行了分析，结果表明：PIP工艺制备的C/C–ZrB2–SiC复合材料的拉伸、弯曲及剪切强度分别为91.2、214和35.8 MPa，优于通过浆料浸渍工艺。同时，氧乙炔火焰试验表明，PIP工艺制备的C/C–ZrB2–SiC复合材料具有良好的抗氧化烧蚀性能，其线烧蚀率和质量烧蚀率分别为0.002 mm/s和0.7 mg/s。

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.

基金项目：

作者简介：

张强(1977—)，男，博士研究生。

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