研究目的
To reduce interface brittle compounds of brazed joints by using laser-textured surface pattern instead of excessive active element to enhance the wetting behavior of brazing filler on Ti3SiC2 ceramic substrate.
研究成果
The cylindrical surface pattern effectively promoted the wetting of Ag–Cu–2Ti brazing filler on Ti3SiC2 substrate, reducing the wetting angle from 59.3° to 27.6°. This method allows for the reduction of Ti content in brazing filler from 4.5 to 2.0 wt.%, optimizing the composition and improving the interface microstructure and mechanical properties of brazed joints.
研究不足
The study focuses on the wetting behavior of brazing filler on Ti3SiC2 ceramic substrate with a specific cylindrical surface pattern. The applicability of the findings to other materials or surface patterns is not explored.
1：Experimental Design and Method Selection:
The study involved designing a cylindrical surface pattern by theoretical calculation and examining it through numerical simulation to enhance the wetting behavior of brazing filler on Ti3SiC2 ceramic substrate.
2：Sample Selection and Data Sources:
Ti3SiC2 ceramic was prepared by self-propagating high-temperature synthesis (SHS) and cut into blocks for the experiment. Three fillers including Ag–Cu–
3：5Ti, Ag–Cu–2Ti, and Ag–28Cu (wt.%) foils were used. List of Experimental Equipment and Materials:
Deep UV laser machine for processing the surface pattern, vacuum wetting angle measuring system for carrying out wetting experiments, and optical photography and data acquisition system for measuring and recording wetting angles.
4：Experimental Procedures and Operational Workflow:
The wetting experiments were carried out at 840°C. The influence of surface pattern on wetting behavior was analyzed by theoretical calculation and numerical simulation using ANSYS FLUENT.
5：Data Analysis Methods:
The results were analyzed to determine the effects of surface pattern on wetting angle and spreading process of brazing filler.
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