Ma Haoran, Bennewitz Roland
INM - Leibniz Institute for New Materials, Saarbrücken, Germany.
Department of Materials Science and Engineering, Saarland University, Saarbrücken, Germany.
Beilstein J Nanotechnol. 2022 Feb 18;13:236-244. doi: 10.3762/bjnano.13.18. eCollection 2022.
Metallic glasses are promising materials for microdevices, although corrosion and friction limit their effectiveness and durability. We investigated nanoscale friction on a metallic glass in corrosive solutions after different periods of immersion time using atomic force microscopy to elucidate the influence of corrosion on nanoscale friction. The evolution of friction upon repeated scanning cycles on the corroded surfaces reveals a bilayer surface oxide film, of which the outer layer is removed by the scanning tip. The measurement of friction and adhesion allows one to compare the physicochemical processes of surface dissolution at the interface of the two layers. The findings contribute to the understanding of mechanical contacts with metallic glasses under corrosive conditions by exploring the interrelation of microscopic corrosion mechanisms and nanoscale friction.
金属玻璃是用于微器件的很有前景的材料，尽管腐蚀和摩擦限制了它们的有效性和耐久性。我们使用原子力显微镜研究了在不同浸泡时间后，金属玻璃在腐蚀性溶液中的纳米级摩擦，以阐明腐蚀对纳米级摩擦的影响。在腐蚀表面上重复扫描循环时摩擦的演变揭示了双层表面氧化膜，其外层被扫描探针去除。摩擦和粘附力的测量使人们能够比较两层界面处表面溶解的物理化学过程。这些发现通过探索微观腐蚀机制和纳米级摩擦之间的相互关系，有助于理解在腐蚀条件下与金属玻璃的机械接触。
