Copper, permalloy, cobalt, and silicon are the materials that have been widely utilised in magnetic devices. When the size of interest is down to the nanoscale, the inter-diffusion between certain materials becomes influential. This paper studies the nanoscale friction characteristics between frictional pairs with and without inter-diffusion properties through the atomic force microscope. The distinct evolution features of nanoscale friction force when inter-diffusion is involved are discovered experimentally, which is also confirmed through theoretical analysis. Firstly, through the thin film deposition method, four pairs of contact materials (Cu–Ni₈₁Fe₁₉, Si–Ni₈₁Fe₁₉, Cu–Co, Cu–Si) are designed for friction tests, in which diffusion occurs at the interface of Cu–Ni₈₁Fe₁₉ pair. Then, the effects of sliding velocity and loading force on the nano friction of each pair are measured. It is found that regardless of the diffusion phenomenon: (1) the adhesion force values exhibit a notable correlation to the values of the friction force; (2) the friction force in all four material pairs consistently increases with the growth of the normal loading force, although the growth rate may differ. In terms of the sliding velocity effect, the friction forces of immiscible materials (Si–Ni₈₁Fe₁₉, Cu–Co, and Cu–Si) are found to increase with the increasing sliding velocity. However, the friction force of Cu–Ni₈₁Fe₁₉, decreases with the increasing sliding velocity. Furthermore, a compositive friction model considering both the velocity and the normal force effect was proposed, which shows good agreement with the experimental results and explains the nano friction behaviour of both miscible and immiscible metals.

铜、坡莫合金、钴和硅是磁性器件中广泛使用的材料。当感兴趣的尺寸降至纳米级时，某些材料之间的相互扩散就会产生影响。本文通过原子力显微镜研究了具有和不具有相互扩散特性的摩擦副之间的纳米级摩擦特性。实验发现了涉及相互扩散时纳米级摩擦力的独特演化特征，并通过理论分析得到了证实。首先，通过薄膜沉积方法，设计四对接触材料（Cu-Ni ₈₁ Fe ₁₉、Si-Ni ₈₁ Fe ₁₉、Cu-Co、Cu-Si）进行摩擦测试，其中界面处发生扩散Cu-Ni ₈₁ Fe ₁₉对。然后，测量滑动速度和加载力对每对纳米摩擦的影响。研究发现，无论扩散现象如何：（1）粘附力值与摩擦力值表现出显着的相关性； (2) 所有四种材料对中的摩擦力都随着法向载荷力的增长而持续增加，尽管增长率可能不同。就滑动速度效应而言，不混溶材料（Si-Ni ₈₁ Fe ₁₉ 、Cu-Co 和 Cu-Si）的摩擦力随着滑动速度的增加而增加。然而，Cu-Ni ₈₁ Fe ₁₉的摩擦力随着滑动速度的增加而减小。此外，提出了考虑速度和法向力效应的综合摩擦模型，该模型与实验结果吻合良好，并解释了混溶和非混溶金属的纳米摩擦行为。