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A novel Cr-doped Al2O3-SiC-ZrC composite coating for ablative protection of C/C-ZrC-SiC composites
Journal of the European Ceramic Society ( IF 5.8 ) Pub Date : 2018-02-08 , DOI: 10.1016/j.jeurceramsoc.2018.02.015
Zheng Peng , Wei Sun , Xiang Xiong , Yonglong Xu , Yuntian Chen

A novel Cr-doped Al2O3-SiC-ZrC coating systemis proposed to further improve the ablation resistance of C/C-ZrC-SiC composites. Our approach combines low pressure plasma spray method with slurry impregnation of Zr-Cr-Si-C to achieve a specially tailored oxide-carbide structure. Results show that the as-prepared coating was dense and crack-free, which effectively promoted the ablation resistance of C/C-ZrC-SiC with the mass and linear ablation rates decreased by 66% and 76% respectively, involving a highly dense protective structure of A1xCr2-xO3-SiO2-ZrO2 formed during ablation. The compact and continuous multi-oxide scale with “ZrO2-rosette” skeleton intricated with A11.96Cr0.04O3 was evidenced in the ablation center.



中文翻译:

一种新型的Cr掺杂Al 2 O 3 -SiC-ZrC复合涂层,用于烧蚀保护C / C-ZrC-SiC复合材料

为了进一步提高C / C-ZrC-SiC复合材料的耐烧蚀性能,提出了一种新型的Cr掺杂Al 2 O 3 -SiC-ZrC涂层体系。我们的方法将低压等离子喷涂方法与Zr-Cr-Si-C的浆料浸渍相结合,以实现专门定制的氧化物-碳化物结构。结果表明,所制备的涂层致密无裂纹,有效提高了C / C-ZrC-SiC的抗烧蚀性,质量和线性烧蚀率分别降低了66%和76%,涉及到高密度的保护层。烧蚀过程中形成的Al x Cr 2-x O 3 -SiO 2 -ZrO 2的结构。带有“ ZrO 2 ”的紧凑且连续的多氧化物水垢烧蚀中心证实有“ Al-rosette”骨架与A1 1.96 Cr 0.04 O 3错综复杂。

更新日期:2018-02-08
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