Competitive correlation between the interface layers determines the shear strength in Kovar/AgCuTi/Si3N4 joints

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

International Journal of Applied Ceramic Technology Pub Date : 2024-10-11 DOI:10.1111/ijac.14920

Haifeng Xu, Jie Wang, Fengsong Fan, Zepeng Zhang, Deyin Zhang, Haoyang Wu, Zhirui Zhang, Aimin Chu, Baorui Jia, Enxiang Pu, Xuanhui Qu, Mingli Qin

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引用次数: 0

Abstract

As a promising high-thermal-conductivity ceramics, the direct bonding of Si₃N₄ with metals remains challenging. Here, we employed active metal brazing of Si₃N₄ ceramics and Kovar alloys using AgCuTi metal filler, and found that the shear strength in the prepared Kovar/AgCuTi/Si₃N₄ joints depends on the competitive correlation between the interface layers. The competitive consumption for active element Ti by Kovar/AgCuTi interfacial reactions reduced AgCuTi/Si₃N₄ interface layer thickness and deteriorated final shear strength, even when using a high-Ti-content filler. Surface analysis indicated that interfacial fracture between Ag-based solid solution and Ti₅Si₃ was the primary cause of failure. Density functional theory (DFT) revealed that Ag (111)/Fe₂Ti (001) interface had higher ideal work of adhesion (W_ad) than Ag (111)/Ti₅Si₃ (001) interface, confirming the importance of AgCuTi/Si₃N₄ interface layer. Ultimately, by adjusting interface reaction layer thickness, the joints reached a high shear strength of 154.3 MPa.

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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;