Mechanical property, oxidation resistance, and ceramization mechanism of MoSi2-SiB6 reinforced phenolic resin matrix composites

IF 2.3 3区材料科学 Q3 MATERIALS SCIENCE, COMPOSITES

Journal of Reinforced Plastics and Composites Pub Date : 2024-09-09 DOI:10.1177/07316844241273028

Qiang Shen, Suohui Yang, Shiquan Zhang, Sheng Hu, Junguo Li, Jian Zhang

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引用次数: 0

Abstract

Ceramizable phenolic resin matrix composites have a significant potential for widespread applications in the field of aerospace ablation. However, due to the sharp decrease of mechanical properties at elevated temperatures, the composite fails to meet the requirements of thermal protection as well as load-bearing of aircraft in a wide temperature range. In this study, boron phenolic composites modified by MoSi2 and SiB6 with high strength in a wide temperature range are prepared. The flexural strength of composites after ablation within the temperature range of 800 °C to 1600 °C ranges from 48.07 to 82.49 MPa. In particular, a significant increase of 224.9% is obtained at 1400 °C with 6 wt% SiB6. The mass ablation rate and line ablation rate of the composites are increased to 0.054 g/s and 0.013 mm/s, respectively. The cooperation effect of oxygen consumption, carbon fixation, oxygen barrier, and liquid phase bonding produced by ceramization reactions involving SiB6, MoSi2, O2, and pyrolytic carbon at different temperatures, resulting in an improvement of the mechanical property and the oxidation resistance of the composite. These composites have a potential in long term thermal protection and load-bearing of new ablation materials.

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MoSi2-SiB6 增强酚醛树脂基复合材料的力学性能、抗氧化性和陶瓷化机制

可釉化酚醛树脂基复合材料在航空航天烧蚀领域具有广泛应用的巨大潜力。然而，由于在高温下力学性能急剧下降，该复合材料无法满足飞机在宽温度范围内的热防护和承重要求。本研究制备了在宽温度范围内具有高强度的 MoSi2 和 SiB6 改性硼酚醛复合材料。在 800 °C 至 1600 °C 的温度范围内，烧蚀后复合材料的抗弯强度在 48.07 至 82.49 MPa 之间。尤其是在 1400 ℃ 时，6 wt% SiB6 的强度显著提高了 224.9%。复合材料的质量烧蚀速率和线烧蚀速率分别提高到 0.054 g/s 和 0.013 mm/s。SiB6、MoSi2、O2 和热解碳在不同温度下的陶瓷化反应产生了耗氧、固碳、阻氧和液相结合的协同效应，从而改善了复合材料的机械性能和抗氧化性。这些复合材料在新型烧蚀材料的长期热保护和承重方面具有潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Reinforced Plastics and Composites 工程技术-材料科学：复合

CiteScore

5.40

自引率

6.50%

发文量

审稿时长

1.3 months

期刊介绍： The Journal of Reinforced Plastics and Composites is a fully peer-reviewed international journal that publishes original research and review articles on a broad range of today''s reinforced plastics and composites including areas in: Constituent materials: matrix materials, reinforcements and coatings. Properties and performance: The results of testing, predictive models, and in-service evaluation of a wide range of materials are published, providing the reader with extensive properties data for reference. Analysis and design: Frequency reports on these subjects inform the reader of analytical techniques, design processes and the many design options available in materials composition. Processing and fabrication: There is increased interest among materials engineers in cost-effective processing. Applications: Reports on new materials R&D are often related to the service requirements of specific application areas, such as automotive, marine, construction and aviation. Reports on special topics are regularly included such as recycling, environmental effects, novel materials, computer-aided design, predictive modelling, and "smart" composite materials. "The articles in the Journal of Reinforced Plastics and Products are must reading for engineers in industry and for researchers working on leading edge problems" Professor Emeritus Stephen W Tsai National Sun Yat-sen University, Taiwan This journal is a member of the Committee on Publication Ethics (COPE).