【摘要】 为研究在纳米摩擦过程中加载温度对Ni₃Al基高温合金力学性能的影响，采用分子动力学方法，构建了Ni₃Al基高温合金纳米摩擦模型，模拟了在不同温度条件下压头摩擦工件过程，得到了工件的摩擦力曲线、晶格结构以及位错变化。结果表明，不同温度下工件的摩擦力曲线基本一致，纳米摩擦划分为开始摩擦与摩擦稳定两个过程;温度的改变对工件摩擦力没有影响;温度上升会增加原子的热运动能量，使原子在晶体内部或表面的活动更活跃，进而加剧原子的逸散现象。更多还原

【Abstract】 In order to study the effect of loading temperature on the mechanical properties of Ni₃Al-based superalloy during the nano-friction process,a Ni₃Al-based alloy nano-friction model is constructed by using molecular dynamics method,and the friction curve,lattice structure and dislocation of the workpiece are obtained by simulating the friction process of the indenter under different temperature conditions. The results show that the friction curves of the workpiece at different temperatures are basically the same,and the nano-friction can be divided into two processes,starting friction and stabilizing friction,the change of temperature has no effect on the friction force of the workpiece. The increase in temperature will improve the thermal motion energy of the atoms,making the atoms more active inside the crystal or on the surface,resulting in more serious atomic escape.更多还原