Determining the fracture toughness of ceramic coatings by relative method

IF 2.3 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

International Journal of Applied Ceramic Technology Pub Date : 2025-05-10 DOI:10.1111/ijac.15158

Liyuan Han, Delong Ma, Xinyi Hu, Tao Li, Jian Zhang, Yiwang Bao

引用次数: 0

Abstract

The fracture toughness of a ceramic coating is an important parameter for the application of coated components, but it is hard to be measured because the coating is usually too thin to be stripped directly from the substrate and tested as a block material. In this study, an effective technique to determine the fracture toughness of coating was proposed. An analytical relationship among the fracture toughness of the coating, substrate sample, and coated sample were derived, so that the fracture toughness of the coating can be calculated from the measured toughness of the substrate and coated samples. This indirect test is called relative method. By this simple method, the fracture toughness of SiC coatings on graphite substrate and on C/C composite substrate were evaluated respectively based on tests of single edge V-notched beam method (SEVNB). The results indicate that the relative method is convenient and feasible for evaluating the fracture toughness of ceramic coatings.

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用相关法测定陶瓷涂层的断裂韧性

陶瓷涂层的断裂韧性是涂层部件应用的重要参数，但由于涂层通常太薄而无法直接从基体上剥离并作为块状材料进行测试，因此很难测量。本研究提出了一种测定涂层断裂韧性的有效方法。导出了涂层断裂韧性、基体试样断裂韧性和涂层试样断裂韧性之间的解析关系，从而可以通过测量基体和涂层试样的韧性来计算涂层的断裂韧性。这种间接试验称为相对法。采用该方法对石墨基体和C/C复合基体上SiC涂层的断裂韧性分别进行了单边v形缺口梁法（SEVNB）测试。结果表明，用该方法评价陶瓷涂层的断裂韧性是方便可行的。

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;