空间飞轮轴承等离子体浸没离子注入氮层性能研究  

Surface Modification of Aerospace Flywheel-Bearings by Nitrogen Plasma Immersion Ion Implantation

作　　者：李兆光[1,2] 张人佶[1] 杨宇[2] 王浪平[3] 

机构地区：[1]清华大学机械工程系先进成型制造教育部重点实验室,北京100084 [2]北京控制工程研究所,北京100190 [3]哈尔滨工业大学现代焊接生产技术国家重点实验室,哈尔滨150001

出　　处：《真空科学与技术学报》2011年第3期326-329,共4页Chinese Journal of Vacuum Science and Technology

摘　　要：研究了氮等离子体浸没离子注入(PIII)技术处理后空间飞轮轴承内圈的摩擦学性能。通过原子力显微镜分析改性前后试样表面形貌,利用X射线电子能谱分析试样表面成分及结构,通过显微硬度计测量改性前后及不同注入时间下试样表面硬度,考察改性前后试样摩擦系数变化情况。结果表明,空间飞轮轴承内圈进行表面注氮后,表面形成Cr-N化合物,形成第二相及固溶强化使得试样表面硬度显著增加,摩擦系数明显减小,耐磨性增加,轴承组件工作电流明显减小。The surfaces of the bearings,used in aerospace flywheels,were modified by nitrogen plasma immersion ion implantation（PIII）,to improve its mechanical properties,such as wear resistance,surface hardness,and friction coefficients.The impacts of the coating conditions on the microstructures and mechanical properties was characterized with X-ray photoelectron spectroscopy,atomic force microscopy and conventional probes.The results show that the surface modification of the bearings by PIII significantly improves its mechanical properties.For instance,formation of the Cr-N compound,the second phase and solid phase,considerably increased its surface micro-hardness and wear-resistance,and reduced both its surface friction coefficients and the rotating current of the bearing

关 键 词：空间飞轮 氮等离子体浸没离子注入 注入时间 摩擦系数 

分 类 号：O484[理学—固体物理]