Mechanical, thermophysical, and ablation properties of C/HfC–SiC composites with various SiC/HfC ratios

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

International Journal of Applied Ceramic Technology Pub Date : 2024-08-13 DOI:10.1111/ijac.14878

Chunlei Yan, Fangming Liu, Wei Wang, Rongjun Liu

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引用次数: 0

Abstract

The mechanical, thermophysical, and ablation properties of 2.5D C/HfC–SiC composites with various SiC/HfC ratios are studied. The S7‐C/HfC–SiC composite with a high SiC/HfC volume ratio of 30.4/15.2 has the highest flexural strength of 203.4 ± 26.8 MPa and fracture toughness of 10.0 ± .5 MPa·m1/2. All C/HfC–SiC composites have a similar low thermal conductivity of ∼2 W·m−1·K−1 and their CTEs are in the range of .45–4.0 × 10−6/K from 30°C to 1400°C. S5‐C/HfC–SiC with medium SiC/HfC ratio possesses the lowest mass ablation rate of .29 ± .02 mg·cm−2·s−1 and linear ablation rate of .003 ± .0002 mm/s. The C/HfC–SiC composites are endowed with a pitting corrosion feature according to the morphology and composition evolution of the ablated surface, which results from both high temperature and stagnation pressure gradients in the radial direction of the oxyacetylene torch.

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不同碳化硅/碳化铪比例的碳化硅/碳化铪-碳化硅复合材料的机械、热物理和烧蚀特性

研究了不同 SiC/HfC 比率的 2.5D C/HfC-SiC 复合材料的力学、热物理性能和烧蚀性能。SiC/HfC体积比为30.4/15.2的S7-C/HfC-SiC复合材料具有最高的抗弯强度（203.4 ± 26.8 MPa）和断裂韧性（10.0 ± .5 MPa-m1/2）。所有 C/HfC-SiC 复合材料都具有类似的低导热性（∼2 W-m-1-K-1），在 30°C 至 1400°C 的温度范围内，它们的 CTE 值在 .45-4.0 × 10-6/K 之间。具有中等 SiC/HfC 比率的 S5-C/HfC-SiC 的质量烧蚀率最低，为 0.29 ± 0.02 mg-cm-2-s-1，线性烧蚀率为 0.003 ± 0.0002 mm/s。根据烧蚀表面的形态和成分演变，C/HfC-SiC 复合材料具有点状腐蚀特征，这是氧乙炔炬径向高温和停滞压力梯度的结果。

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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;