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    Improving tribological properties of Ti-Zr alloys under starved lubrication by combining thermal oxidation and laser surface texturing

    Year: 2022

    Journal: Wear, Volume 496, MAY 15

    Authors: Niu, Yixu; Pang, Xianjuan; Yue, Shiwei; Wang, Shuai; Song, Chenfei; Shangguan, Bao; Zhang, Yongzhen

    Organizations: National Natural Science Foundation of China [52105181, U1804252]; Natural Science Foundation of Henan [202300410141]; Key Scientific Research Project Fund of Education of Henan Province [20A430009]; National Key Research and Development Program of China [2018YFB2000302]

    Keywords: Tribological properties; Ti-Zr alloys; Laser surface texturing; Thermal oxidation

    In efforts to improve the tribological properties of the Ti-Zr alloy, thermal oxidization (TO) and laser surface texturing (LST) were performed on the surfaces of the alloy. Four kinds of samples, i.e., TO combined LST (TOLST), TO without LST (TO-only), LST without TO (LST-only) and annealed-only (Contrast) samples were prepared. The tribological properties of the samples were investigated by carrying out sliding wear tests under starved lubrication using a ball-on-disc tribometer. The results show that TO treatment significantly improves the tribological properties of the surfaces due to the formation of the ZrTiO4 layer which has a higher hardness and better wettability with PAO4 oil. More interestingly, the synergistic effect of TO-layer and LST can further improve the tribological properties since the dimple-textures can exist for a long time and offer effective lubrication for the contract areas.
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