采用 Cansas 3303 SiC 纤维的 CVI 和 RMI SiC/SiC 复合材料的热稳定性

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2024-10-20 DOI:10.1016/j.jeurceramsoc.2024.117004

Guangda Guo, Fang Ye, Laifei Cheng, Wanshun Lei

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引用次数: 0

摘要

研究了热处理对 Cansas 3303 SiC 纤维束以及通过 CVI 或 RMI 制备的具有 BN 相间的 SiC/SiC 复合材料的微观结构和性能的影响。此外，还考察了 CVI 或 RMI SiC/SiC 复合材料在不同温度下的拉伸性能和断裂行为。未受约束的 SiC 纤维束在 1350°C 以下保持稳定，在 1450°C 时减半，并随着温度的升高而进一步减小。不过，在复合材料中，相间层和基体对纤维施加压应力，缓解了纤维性能的下降。相间层的微观结构主要受热处理温度的影响。两种复合材料的拉伸强度都随温度的升高而降低。在 1200°C 的热处理温度下，两种复合材料都能保持结构稳定，弯曲性能变化极小。随着热处理温度和时间的进一步升高，抗弯强度会降低。本文讨论了两种复合材料性能退化的机理，并建立了研究 SiC/SiC 复合材料热稳定性的方法。

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Thermal stability of CVI and RMI SiC/SiC composites adopting Cansas 3303 SiC fibers

The effect of heat treatment on the microstructure and performance of Cansas 3303 SiC fiber bundles and SiC/SiC composites with BN interphase, prepared by CVI or RMI, are investigated. Additionally, the tensile properties and fracture behavior at different temperature of CVI or RMI SiC/SiC composite are examined. Unconstrained SiC fiber bundles stable below 1350°C, halving at 1450°C and further decreasing with temperature rises. In the composites, however, the interphase and matrix exert compressive stress on fibers, mitigating their performance decline. The microstructure of interphase is mainly affected by heat treatment temperature. Tensile strength of both composites decreases with temperature. Both composites maintain structural stability with minimal changes in flexural properties below heat treatment at 1200°C. The flexural strength decreases with further rising heat treatment temperature and time. The mechanisms of properties degradation in both composites are discussed and a method for studying the thermal stability of SiC/SiC composites is established.

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.