材料科学
钎焊
复合材料
陶瓷
钛
微观结构
接头(建筑物)
合金
冶金
结构工程
工程类
作者
Jianguo He,Shoujun Dai,Yang Zhao,Min Huang,Yang Liu,Jia-Qi Yu,Yu Tan,Lianwen Fan,Wenqi Ge,Yunfeng Ma
出处
期刊:Materials
[Multidisciplinary Digital Publishing Institute]
日期:2022-09-29
卷期号:15 (19): 6750-6750
被引量:4
摘要
Si3N4 ceramics with a microscale rice leaf structure (MRLS) and titanium alloy were connected via brazing, and the influence of the surface microstructure on the ceramic connection was analyzed. MRLS fabrication is an efficient and high-degree-of-freedom method that can be used to change a material's surface morphology and wettability. The MRLS was obtained at a laser power of 110 W, with line spacings of 100 and 50 μm. The laser-treated surface included nanoparticles and micro particles, exhibiting a coral-like structure after agglomeration. When the MRLS was used to braze the titanium alloy, no defects were observed at the brazing interface, and the formation was excellent. Throughout the brazed joint, the MRLS remained intact and formed a strong metallurgical bond with the brazing filler metal. A finite element analysis was performed to study the cross-sectional morphology after joint fracture; from the load-time curve, it was found that the MRLS on the surface not only helped improve the mechanical occlusion and brazing area at the interface, but also helped generate compressive stress on the Si3N4 side. Crack propagation was hindered, thereby increasing the joint strength.
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