Preparation of jointed composites with interconnected SiC nanowires network for nuclear SiC fiber reinforced SiC composites

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

International Journal of Applied Ceramic Technology Pub Date : 2024-06-16 DOI:10.1111/ijac.14829

Meihan Ren, Xiao You, Mengli Xiao, Han Luo, Yudong Xue, Chunjing Liao, Haijun Zhou, Jinshan Yang, Xiangyu Zhang, Shaoming Dong

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引用次数: 0

Abstract

The reliable jointing of SiC_f/SiC is considered to be a key factor limiting the application in the field of nuclear cladding. In this work, a jointing layer with interconnected SiC nanowires (SiCNWs) toughening network is prepared by a typical two-step routine. The high-viscosity slurry containing the precursor is pyrolyzed to form a porous SiC-based jointing layer, which is then densified by chemical vapor infiltration. Besides, SiC powders are introduced into the slurry to further increase the density of the jointing layer. The homogeneous SiC jointing material enables the strength and effectively avoids the mismatch between the thermal expansion coefficient of the jointing layer and SiC_f/SiC composites, and the apparent shear strength of the jointing specimen reaches 7.211 MPa. It is found that the joint with SiCNWs shows better shear strength than the joint without SiCNWs, and the improved mechanical properties could be attributed to the pull-out and bridging of SiCNWs.

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制备具有互连碳化硅纳米线网络的接合复合材料，用于核用碳化硅纤维增强碳化硅复合材料

SiCf/SiC 的可靠接合被认为是限制其在核包层领域应用的一个关键因素。在这项工作中，采用典型的两步法制备了具有相互连接的碳化硅纳米线（SiCNWs）增韧网络的接合层。含有前驱体的高粘度浆料经过热解形成多孔的碳化硅基接合层，然后通过化学气相渗透进行致密化。此外，浆料中还会加入 SiC 粉末，以进一步提高接合层的密度。均匀的 SiC 接合材料提高了强度，有效避免了接合层与 SiCf/SiC 复合材料热膨胀系数之间的不匹配，接合试样的表观剪切强度达到 7.211 兆帕。研究发现，与不含 SiCNWs 的接合试样相比，含 SiCNWs 的接合试样具有更好的剪切强度。

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;