中文摘要：

采用分子动力学模拟的方法研究了硅针尖在金刚石基底滑动的黏滑现象，讨论了纳米尺度下温度、滑动速度、载荷等因素对黏滑摩擦的影响．模拟结果表明，在纳米尺度下，原子排列规则的两固体间的滑动摩擦力呈现出周期性的锯齿型变化．摩擦力曲线的波动周期取决于滑动过程中基体沿滑动方向的晶格常数，同时受接触面原子排列结构变化的影响．在较低温度范围内，滑动摩擦力随温度的升高近似呈线性减小，对滑动摩擦力的波动周期和振幅影响不大．在一定速度范围内，滑动摩擦力主要受黏着作用的影响，滑动摩擦力的大小随速度的增大近似呈线性增大．在一定载荷范围内，滑动摩擦力随载荷的增大近似呈线性增大，振动周期变大．

英文摘要：

Molecular dynamics （MD） simulation of nanoscale stick-slip phenomena was performed for a silicon tip in contact with the diamond substrate. The influence of sliding velocity, normal force and temperature on the stick-slip at the nanoscale was analyzed. It is found that the regular arrangement of the atoms on the sliding surface induces a periodic sawtooth-like behavior in the friction curve. The period of the ＂sawtooth＂ depends on the lattice constant of the substrate along the sliding direction, and it is affected by the positions of atomic rows. In lower temperature range the sliding friction approximately linearly decreases with the increase of temperature, while the period and amplitude are little affected by the temperature. For a certain extent of velocity the sliding friction approximately linearly increases with sliding velocity due to the adhesive action. In certain range of normal force the sliding friction approximately linearly increases with the increase of normal force, meanwhile the vibration period of the sliding friction becomes larger.