801 原子スケールのスティックスリップ現象の3次元解析(オーガナイズドセッション : 加工・機械の構造と機能の進化)

概要

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To clarify friction phenomena generated in the surface observation by atomic force microscope (AFM), several molecular dynamics simulations have been performed. In the simulations, a 3-dimensional simulation model is proposed where the specimen and the probe are assumed to consist of mono-crystalline copper and rigid diamond, respectively, and the effect of cantilever stiffness of AFM is also taken into consideration. The friction process without wear on a well-defined copper {100} surface by a diamond probe is simulated. From the simulation results, atomic-scale stick-slip phenomenon just like observed in the AFM surface observation is realized. Generation of the 2-dimensional friction process even in one-dimensional sliding simulation is confirmed. Influences of the point defect in the specimen surface and the probe tip shape on observed surface image are also evaluated.
2000-09-08