Tribological properties and wear mechanisms of TixVNbTaWy RHEAs sliding against Si3N4 ceramic balls: The effects of Ti and W contents
Tribological properties and wear mechanisms of TixVNbTaWy RHEAs sliding against Si3N4 ceramic balls: The effects of Ti and W contents
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DOI：
10.1016/j.triboint.2022.107801
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发表时间：
2022-07
影响因子：
6.2
通讯作者：
Xin You;Junjie Song;Peng-yu Lin;Xiaoyu Zhang;Yunfeng Su;Haifeng Wang;Yongsheng Zhang;Litian Hu-Liti
中科院分区：
文献类型：
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作者：
Xin You;Junjie Song;Peng-yu Lin;Xiaoyu Zhang;Yunfeng Su;Haifeng Wang;Yongsheng Zhang;Litian Hu-Liti
采用机械混合和放电等离子烧结方法制备了三种不同Ti、W含量的新型TixVNbTaWyRHEAs。研究了Ti和W含量对合金力学性能和摩擦学性能的影响，重点探讨了合金与Si 3 N4陶瓷在室温至900 °C滑动摩擦过程中的磨损机理。结果表明，三种合金均具有较高的室温压缩强度和> 12%的塑性应变。更关键的是，优化后的合金在600 °C下的磨损率可低至6.8 × 10− 6 mm 3/（N·m）。摩擦诱发的亚表面强化以及连续氧化膜和塑性变形层的形成对降低磨损率起着重要作用。
Three new TixVNbTaWyRHEAs with different contents of Ti and W were prepared by mechanical mixing and spark plasma sintering. The effects of Ti and W contents on the mechanical and tribological properties were explored, with a focus on the wear mechanisms of the alloys sliding against Si3N4ceramics from room temperature to 900 °C. The results showed that all three alloys exhibited high compressive strength and plastic strain of > 12% at room temperature. More crucially, the wear rate of the optimized alloy can be as low as 6.8 × 10−6mm3/(N·m) at 600 °C. Friction-induced subsurface strengthening and the formation of continuous oxide films and plastic deformation layers played an important role in reducing the wear rate.