Ablative property and mechanism of C/C-ZrB2-ZrC-SiC composites reinforced by SiC networks under plasma flame

Ablative property and mechanism of C/C-ZrB2-ZrC-SiC composites reinforced by SiC networks under plasma flame
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SiC网络增强C/C-ZrB2-ZrC-SiC复合材料在等离子火焰下的烧蚀性能及机理

DOI:
10.1016/j.corsci.2016.02.015
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发表时间:
2016-06
期刊:
影响因子:
8.3
通讯作者:
Li Jun
Li Jun
中科院分区:
材料科学1区
文献类型:
--
作者:
Chang Xin;Xue Liang;Zhong Ping;Li Jun

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以C/C-ZrB 2织物为预制体,采用先驱体浸渗-热解工艺制备了SiC网络增强C/C-ZrB 2-ZrC-SiC复合材料。不同长度的SiC丝在复合材料的孔隙和基体中形成网络。复合材料在等离子火焰下具有良好的耐烧蚀性能。烧蚀后,在烧蚀中心形成一层网状强化膜,可以阻止氧和热对基体的侵蚀。网络互锁结构的形成不仅提高了薄膜的韧性,而且由于烧蚀网络的钉扎作用,提高了薄膜的结合能力。
SiC network reinforced C/C-ZrB2-ZrC-SiC composites are prepared by precursor infiltration and pyrolysis process with C/C-ZrB2fabric as preform. SiC wires with different lengthscales form networks in pores and matrix of the composites. The composites exhibit good ablation resistance under the plasma flame. After ablation, a network reinforced film is formed in the ablation center, which can prevent the oxygen and heat attacking the substrate. The formation of the network interlocking structure not only improves the toughness of the film, but also enhances the bonding ability of the film due to the pinning effect of the ablated networks.
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