Fretting Wear Behavior and Photoelectron Spectroscopy (XPS) Analysis of a Ti/TiN Multilayer Film Deposited on Depleted Uranium

Materials

Piheng Chen¹  Liping Fang¹  Anyi Yin¹  Shengfa Zhu¹  Fan Jiang¹  Jiawei Yan¹  Xiandong Meng¹  Yanping Wu¹  Zhengyang Li²  Zhenbing Cai² 

[1] Institute of Materials, China Academy of Engineering Physics, Mianyang 621900, China;Tribology Research Institute, National Traction Power Laboratory, Southwest Jiaotong University, Chengdu 610031, China;

关键词: depleted uranium;    multilayer film;    fretting wear;    wear mechanism;   

DOI  :  10.3390/ma11091538

来源: DOAJ

【 摘 要 】

Depleted uranium has been widely applied in nuclear energy fields. However, its poor corrosion and wear resistance restrict its applications. A titanium/titanium nitride (Ti/TiN) multilayer film was deposited on a uranium surface to improve its fretting wear resistance. Fretting wear tests were carried out using a pin-on-disc configuration. The fretting behaviors of uranium and the Ti/TiN film were investigated under different normal loads. With the normal load increasing, the mode of fretting wear gradually transformed from slip region (SR) to mixed fretting region (MFR) and then to partial slip region (PSR). It is illustrated that the normal load had an obvious effect on the fretting wear behavior. The friction coefficients of both uranium and Ti/TiN multilayer film decreased with the increase of the normal load. In SR, the main wear mechanisms were delamination and abrasion for uncoated uranium, and delamination and oxidation for uranium coated with the Ti/TiN multilayer film. Photoelectron spectroscopy (XPS) analysis also showed that the Ti/TiN coating was oxidized and formed TiO2 during fretting wear. The wear depth of naked uranium was much greater than that of coated uranium, which demonstrated that the Ti/TiN multilayer film could effectively improve the wear properties of uranium.

【 授权许可】

Unknown