利用多弧离子镀技术在铀表面制备Ti/TiN多层涂层以提高其微动磨损性能.采用SEM、XRD和AES研究多层涂层的形貌、结构和元素分布.通过销/盘接触方式研究铀及Ti/TiN多层涂层的微动磨损行为.铀及Ti/TiN多层涂层的微动磨损测试条件为载荷20 N、位移幅值5～100μm.随着位移幅值的增加,微动运行从部分滑移区变为完全滑移区.摩擦因数随着位移幅值的增加而增加.结果表明,位移幅值显著影响涂层的微动磨损性能.当位移幅值小于20μm时,涂层出现轻微损伤.研究表明,Ti/TiN多层涂层在部分滑移区的主要磨损机理为剥层,而在完全滑移区的磨损机理为剥层和磨粒磨损.%Ti/TiN multilayer film was deposited on uranium surface by arc ion plating technique to improve fretting wear behavior. The morphology, structure and element distribution of the film were measured by scanning electric microscopy (SEM), X-ray diffractometry (XRD) and Auger electron spectroscopy (AES). Fretting wear tests of uranium and Ti/TiN multilayer film were carried out using pin-on-disc configuration. The fretting tests of uranium and Ti/TiN multilayer film were carried out under normal load of 20 N and various displacement amplitudes ranging from 5 to 100 μm. With the increase of the displacement amplitude, the fretting changed from partial slip regime (PSR) to slip regime (SR). The coefficient of friction (COF) increased with the increase of displacement amplitude. The results indicated that the displacement amplitude had a strong effect on fretting wear behavior of the film. The damage of the film was very slight when the displacement amplitude was below 20 μm. The observations indicated that the delamination was the main wear mechanism of Ti/TiN multilayer film in PSR. The main wear mechanism of Ti/TiN multilayer film in SR was delamination and abrasive wear.
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