颤振环境MoS2/Ag薄膜碰撞滑动接触摩擦性能研究 杜晶涛1, 佟瑞庭1, , , 王云峰1, 权泽芬2

基于空间机构的运动特性，考虑空间颤振环境的影响，采用粗粒化分子动力学研究MoS2/Ag薄膜的碰撞滑动接触摩擦性能，建立颤振环境碰撞滑动接触摩擦的粗粒化分子动力学模型，对比了纯Ag和MoS2/Ag薄膜的摩擦性能，研究了初始碰撞速度、滑动速度以及空间温度对碰撞滑动接触摩擦过程的影响. 结果表明：与纯Ag相比，MoS2/Ag薄膜表现出更优异的摩擦性能；压头碰撞速度对动能有一定的贡献，初始碰撞速度的增加会增大压头压入基体的深度，使得平均摩擦力增大；滑动速度的增加会加剧原子间的相互剪切摩擦，使平均摩擦力增加；MoS2/Ag薄膜在100~500 K温度范围内表现出良好的摩擦性能，当空间温度为600 K时，其摩擦性能降低，并伴随着MoS2膜的破裂.

Based on the kinematic characteristics of spatial mechanisms and taking the influence of space flutter environment into account, this work uses coarse-grained molecular dynamics (CG-MD) to study the collisional sliding contact friction properties of MoS₂/Ag composite films, and constructs a CG-MD model for collisional sliding contact friction under flutter environments. The friction properties of pure Ag and MoS₂/Ag composite films are compared, and the effects of initial impact velocity, sliding velocity and space temperature on the collisional sliding contact friction process are investigated. The results demonstrate that: compared with pure Ag, MoS₂/Ag composite films show superior friction performance; The indenter impact velocity contributes to the kinetic energy to a certain degree, and increasing the initial impact velocity will enlarge the indentation depth of the indenter into the substrate, thereby increasing the average friction force; The rise of sliding velocity intensifies the inter-atomic shear friction, leading to an increase in the average friction force; MoS₂/Ag composite films exhibit favorable friction properties within the temperature range of 100–500 K, while when the space temperature reaches 600 K, their friction performance deteriorates, accompanied by the rupture of the MoS₂ film.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于颤振环境下MoS2/Ag薄膜的碰撞滑动接触摩擦性能研究，采用粗粒化分子动力学方法建立模型，对比了纯Ag与MoS2/Ag薄膜的摩擦表现。研究发现MoS2/Ag薄膜具有更优的摩擦性能，并分析了初始碰撞速度、滑动速度和温度（100-600 K）对摩擦过程的影响，为空间机构摩擦学应用提供了数据支持。