Abstract
The Ti/TiN multi-layer film was prepared on the depleted uranium (DU) substrate by cathodic arc ion plating equipment. The character of multi-layer film was studied by SEM, XRD and AES, revealed that the surface was composed of small compact particle and the cross-section had a multi-layer structure. The fretting wear performance under different frequencies was performed by a MFT-6000 machine with a ball-on-plate configuration. The wear morphology was analyzed by white light interferometer, OM and SEM with an EDX. The result shows the Ti/TiN multi-layer film could greatly improve the fretting wear performance compared to the DU substrate. The fretting wear running and damaged behavior are strongly dependent on the film and test frequency. The fretting region of DU substrate and Ti/TiN multi-layer under low test frequency is gross slip. With the increase of test frequency, the fretting region of Ti/TiN multi-layer change from gross slip to mixed fretting, then to partial slip.
Highlights
Three isotopes of uranium exist in the natural world, 238U, 235U, 234U, in the relative content of 99.275, 0.720, and 0.005%, respectively [1]
The surface morphology and cross-section morphology of the Ti/TiN multi-layer film prepared on depleted uranium (DU) are shown in Fig 1(b) and 1(c).The scanning electron microscopy (SEM) image shows that Ti/TiN multi-layer film is composed of many small particles and it is more compact compared to the single TiN film [16]
The typical Auger depth profiles of Ti/TiN multi-layer film on DU substrate shown in Fig 3(b) reveal that the elemental distribution of Ti and N with the film depth
Summary
Three isotopes of uranium exist in the natural world, 238U, 235U, 234U, in the relative content of 99.275, 0.720, and 0.005%, respectively [1]. Ti/TiN multilayer film and fretting wear under different velocity and road condition [10, 11]. The fretting wear mechanism of Ti/TiN multilayer film was discussed.
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