Effect of fiber type on the ablation resistance of sharp leading-edge C/C-ZrB2-SiC composites: mesophase pitch carbon fibers vs. PAN-based fibers

IF 7.7 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES
Pengyu Ji , Xinying Lei , Qiangang Fu, Bing Liu, Songlin Chen
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引用次数: 0

Abstract

To enhance the ablation resistance of sharp leading-edge carbon/carbon (C/C) composites, ZrB2-SiC was introduced into them by a combined technique of vacuum filtration and chemical vapor deposition (CVD). The effect of fiber type, hybrid high thermal conductivity mesophase pitch carbon fiber (CFMP) and PAN-based fibers (CFPAN), on the ablation resistance of the C/C-ZrB2-SiC composites was systematically evaluated under an oxyacetylene flame exposure at a heat flux of 2.38 MW/m2 for 60s. Compared with the C/C-ZrB2-SiC composite reinforced only by CFPAN, the surface temperature of hybrid CFMP/CFPAN-reinforced C/C-ZrB2-SiC composite decreased by ∼386 °C (a 17 % reduction) along with 15 % and 53 % lower mass and linear ablation rates, respectively. The superior ablation resistance is attributed to the efficient heat dissipation, thereby mitigating stagnation point ablation of the sharp leading edge. These findings present a viable strategy for engineering next-generation thermal protection components with excellent oxidation/ablation resistant performance.
纤维类型对锋利前缘C/C- zrb2 - sic复合材料抗烧蚀性能的影响:中间相沥青碳纤维与pan基纤维
为了提高锐利前缘碳/碳(C/C)复合材料的抗烧蚀性能,采用真空过滤和化学气相沉积(CVD)相结合的方法,将ZrB2-SiC引入复合材料中。在热通量为2.38 MW/m2的氧乙炔火焰下,系统地研究了纤维类型、混杂高导热中间相沥青碳纤维(CFMP)和pan基纤维(CFPAN)对C/C- zrb2 - sic复合材料抗烧蚀性能的影响。与仅由CFPAN增强的C/C- zrb2 - sic复合材料相比,混杂CFMP/CFPAN增强的C/C- zrb2 - sic复合材料的表面温度降低了~ 386℃(降低17%),质量和线性烧蚀率分别降低了15%和53%。优异的抗烧蚀性能归功于高效的散热,从而减轻了尖锐前缘的驻点烧蚀。这些发现为设计具有优异抗氧化/抗烧蚀性能的下一代热防护元件提供了可行的策略。
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来源期刊
Composites Communications
Composites Communications Materials Science-Ceramics and Composites
CiteScore
12.10
自引率
10.00%
发文量
340
审稿时长
36 days
期刊介绍: Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.
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