• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2025, Vol. 61 ›› Issue (4): 156-166.doi: 10.3901/JME.2025.04.156

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Effect of Ti3AlC2 Construction Gradient Interface on Brazing Diamond Abrasive Grains with Cu-20Sn-10Ti Filler Metals

CUI Bing1, JIANG Tao1, ZHAO Weixing1, FU Yucan2, DU Quanbin3   

  1. 1. College of Material Science and Engineering, Anhui University of Technology, Ma'anshan 243002;
    2. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016;
    3. Henan Key Laboratory of Intelligent Manufacturing Equipment Integration for Superhard Materials, Henan Mechanical and Electrical Vocational College, Xinzheng 451191
  • Received:2024-04-05 Revised:2024-10-16 Published:2025-04-14

Abstract: In order to investigate the effect of gradient interface on the grinding performance and interfacial bond strength of Cu-based filler metals brazed diamond specimens, Cu-based brazing materials are modified using ceramic particles with different Ti3AlC2 contents and diamond abrasive grits are brazed. The microstructure and interfacial structure of diamond abrasive grains of brazed specimens are evaluated using scanning electron microscope and energy dispersive spectrometer. The wear resistance of the brazed specimens is investigated using a high precision friction wear tester. Finally, the effect of single interface layer and gradient interface on the stress distribution of diamond abrasive grits and filler metals layer is studied using ANSYS finite element analysis software for research. The results indicate that Ti3AlC2 decomposed to form TiC, which weakened the violent reaction between the active element Ti and diamond abrasive grits in the filler metals, thus reducing the thermal damage of diamond abrasive grits, while the more active Al atoms reacted with diamond abrasive grits to form Al4C3 interfacial layer. The best wear resistance and lowest grinding coefficient of brazed specimens are achieved with the optimal Ti3AlC2 addition content of 3%, and the tile removal rate is increased by 34%. The gradient interface is more effective in reducing the stress in the brazing layer.

Key words: Ti3AlC2, grinding properties, gradient interface, mechanical properties, stress

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