High temperature stability of SiC/mullite mini composites

IF 1.8 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

International Journal of Applied Ceramic Technology Pub Date : 2025-02-20 DOI:10.1111/ijac.15078

Wei Zhang, Qingsong Ma, Kuanhong Zeng, Weiguo Mao

引用次数: 0

Abstract

To clarify the failure behavior of SiC/mullite composites, the microstructure, micro- and macro-mechanical properties of the mini composites after annealing were investigated to estimate the high temperature stability. The as-received composites presented favorable flexural strength (∼629.6 MPa) and applicable interfacial bonding strength (∼26.2 MPa). The composites exhibited well high temperature stability at the temperature not exceeded 1400°C. Meanwhile, SiC fiber and mullite displayed relatively stable micro mechanical properties. The enhanced interfacial bonding strength caused by the further shrinkage of mullite matrix during annealing was responsible for the decreased flexural strength of the composites. The carbothermal reduction between SiC fiber and mullite matrix occurred at 1500°C, the microstructure of the composites was damaged and a strong chemical bonding formed. Consequently, the annealed composites showed remarkable weight loss and mechanical properties degradation.

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SiC/莫来石微型复合材料的高温稳定性

为了明确SiC/莫来石复合材料的破坏行为，研究了退火后的微型复合材料的显微组织、微观和宏观力学性能，以评估其高温稳定性。所得复合材料具有良好的抗折强度（~ 629.6 MPa）和适用的界面结合强度（~ 26.2 MPa）。复合材料在温度不超过1400℃时表现出良好的高温稳定性。同时，SiC纤维和莫来石均表现出相对稳定的微观力学性能。退火过程中莫来石基体的进一步收缩导致复合材料的界面结合强度增强，导致复合材料的抗折强度下降。在1500℃时，SiC纤维与莫来石基体发生碳热还原，复合材料的显微组织被破坏，形成了强的化学键。因此，退火后的复合材料表现出明显的失重和力学性能下降。

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

International Journal of Applied Ceramic Technology 工程技术-材料科学：硅酸盐

CiteScore

3.90

自引率

9.50%

发文量

280

审稿时长

4.5 months

期刊介绍： The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas: Nanotechnology applications; Ceramic Armor; Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors); Ceramic Matrix Composites; Functional Materials; Thermal and Environmental Barrier Coatings; Bioceramic Applications; Green Manufacturing; Ceramic Processing; Glass Technology; Fiber optics; Ceramics in Environmental Applications; Ceramics in Electronic, Photonic and Magnetic Applications;