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<p>The aim was to reduce the thermal damage of brazed diamond and improve the interfacial bond strength and wear performance. The interfacial properties and wear performance of nickel-based amorphous filler alloy modified with rare earth Gd and its brazed diamond were investigated, and the mechanism of Gd doping to improve the wear performance and interfacial bond strength was elucidated. The results show that the addition of Gd makes the morphology of the brazed diamond more complete. Gd induced the transverse diffusion of Cr atoms, which changed the carbides from longitudinal growth to transverse and longitudinal growth at the same time. When the additional amount of Gd was 0.4 wt.%, the number of cutting edges of diamond was the largest, the degree of diamond exposure was the highest, the carbide layer was distributed with dense and uniform organization, the thickness of the carbide layer was up to 3&#xa0;µm, and the hydrostatic strength of brazed diamond was up to 3225.8&#xa0;MPa. At the same time, it has the best wear performance, the number of diamond shedding is the least, and the maximum amount of material removal is 620&#xa0;mg.</p>

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Interfacial Characteristics and Wear Performance of Brazed Diamond Using Ni-Cr Amorphous Filler Alloy Reinforced with Gd

  • 期刊论文

  • 发表日期：

    2025年2月18日

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  • Dong Xu,
  • Tian Jin,
  • Minglang Liu,
  • Pengbo Wang,
  • Yanming He,
  • Liujie Xu,
  • Changjin Liu

摘要

The aim was to reduce the thermal damage of brazed diamond and improve the interfacial bond strength and wear performance. The interfacial properties and wear performance of nickel-based amorphous filler alloy modified with rare earth Gd and its brazed diamond were investigated, and the mechanism of Gd doping to improve the wear performance and interfacial bond strength was elucidated. The results show that the addition of Gd makes the morphology of the brazed diamond more complete. Gd induced the transverse diffusion of Cr atoms, which changed the carbides from longitudinal growth to transverse and longitudinal growth at the same time. When the additional amount of Gd was 0.4 wt.%, the number of cutting edges of diamond was the largest, the degree of diamond exposure was the highest, the carbide layer was distributed with dense and uniform organization, the thickness of the carbide layer was up to 3 µm, and the hydrostatic strength of brazed diamond was up to 3225.8 MPa. At the same time, it has the best wear performance, the number of diamond shedding is the least, and the maximum amount of material removal is 620 mg.