The drilling and sampling technique is the preferred method for lunar soil sample collection. In response to the poor wettability of the AgCuNiMn brazing alloy that is utilized for the lunar soil drilling tools on the surface of Inconel 718 superalloy, a nickel plating process was adopted for surface modification of the superalloys. Under the conditions of 890 °C and 10 min, the influence of nickel plating and different plating thicknesses on the wettability and gap-filling capability of the brazing alloy, as well as the microstructure and mechanical characteristics of the joints, were investigated. An analysis was done on the brazed joints’ microstructural development process and strengthening mechanism. The findings show that nickel plating on the superalloys’ surfaces considerably increases the brazing alloy’s wettability to the substrate and its gap-filling capacity. The gaps between the base materials are closed, and the contact angle between the brazing alloy and the superalloy surface is decreased from 20 to 4°. With an increase in plating thickness, the joint’s shear strength initially rises and subsequently falls. When the plating thickness is 28 μm, the shear strength is increased by 43.5% (from 168 to 241 MPa) compared to the unplated brazed joint.

钻孔取样技术是月壤样品采集的首选方法。针对月壤钻具用AgCuNiMn钎料在Inconel 718高温合金表面润湿性较差的问题，采用镀镍工艺对高温合金进行表面改性。在890 ℃、10 min条件下，研究了镀镍层和不同镀层厚度对钎料润湿性、填隙能力以及接头显微组织和力学性能的影响。分析了钎焊接头的显微组织发展过程和强化机制。研究结果表明，高温合金表面镀镍显着提高了钎焊合金对基体的润湿性及其间隙填充能力。母材之间的间隙被封闭，钎料与高温合金表面之间的接触角从20°减小到4°。随着镀层厚度的增加，接头的剪切强度首先上升，随后下降。当镀层厚度为28μm时，与未镀层钎焊接头相比，剪切强度提高了43.5%（从168MPa增加到241MPa）。