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

doi:10.3901/JME.2025.04.156

Abstract

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

CLC Number:

TG425

CUI Bing, JIANG Tao, ZHAO Weixing, FU Yucan, DU Quanbin. Effect of Ti₃AlC₂ Construction Gradient Interface on Brazing Diamond Abrasive Grains with Cu-20Sn-10Ti Filler Metals[J]. Journal of Mechanical Engineering, 2025, 61(4): 156-166.

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References

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

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