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首页> 外文期刊>Materials Science and Engineering >Microstructures And Mechanical Properties Of A Low-cost Three-dimensional Needled Carbon/silicon Carbide Composite
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Microstructures And Mechanical Properties Of A Low-cost Three-dimensional Needled Carbon/silicon Carbide Composite

机译：低成本三维针刺碳/碳化硅复合材料的组织和力学性能

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摘要

Unidirectional air-pressure impregnation combined with hot-pressing curing is a low-cost and short-time fabrication of a three-dimensional needled carbon/carbon (C/C) composite. Its density of 1.26 g/cm~3 was achieved via one phenolic resin impregnation-pyrolysis cycle. The increase in volume content of carbon fibers by 67% was achieved. The C/C composite was transformed into a carbon/silicon carbide (C/SiC) composite with a density of 2.00 g/cm~3 by liquid silicon infiltration. The microstructures at every stage of preparation process and the mechanical properties of the final C/SiC composite were investigated. The results indicated that the C/SiC composite which contained dense C/C substructures was composed of 53wt% C, 44wt% SiC and 3wt% Si. The C/SiC composite showed a flexural strength of 82 MPa and non-brittle fracture behavior.
机译：单向气压浸渍与热压固化相结合是一种低成本，短时间制造三维针状碳/碳（C / C）复合材料的方法。通过一个酚醛树脂浸渍-热解循环获得1.26 g / cm〜3的密度。碳纤维的体积含量增加了67％。通过液硅渗透将C / C复合材料转变为密度为2.00 g / cm〜3的碳/碳化硅（C / SiC）复合材料。研究了制备过程中每个阶段的微观结构以及最终C / SiC复合材料的力学性能。结果表明，含有致密C / C子结构的C / SiC复合材料由53wt％的C，44wt％的SiC和3wt％的Si组成。 C / SiC复合材料显示出82 MPa的抗弯强度和非脆性断裂行为。

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