The influence of low content (<5 at. %) of Ta on the mechanical and friction properties of NiTi alloys was investigated by nanoindentation and tribological tests. The elastic recovery and the Coefficient of Friction (CoF) of these alloys were improved and lowered respectively with Ta content. The CoF behavior is divided into three main stages: the first one, is characterized by greater amplitude in CoF values, the second one by a decrement, possibly due to mechanically mixed layers, and the third one by a stabilization due to adjustment of the surfaces. Two alloys; Ni₅₁Ti₄₇Ta₂ and Ni₅₁Ti₄₆Ta₃ show one the lowest CoF and the best elastic recovery within this study.

通过纳米压痕和摩擦学测试，研究了低含量（<5 at。％）的Ta对NiTi合金的机械和摩擦性能的影响。随着Ta含量的增加，这些合金的弹性回复率和摩擦系数（CoF）分别得到改善和降低。CoF行为分为三个主要阶段：第一个阶段的特征在于CoF值的振幅更大，第二个阶段的衰减可能是由于机械混合层引起的，而第三个阶段则是由于调整了表面而产生的稳定性。两种合金；Ni ₅₁ Ti ₄₇ Ta ₂和Ni ₅₁ Ti ₄₆ Ta ₃在本研究中显示出最低的CoF和最佳的弹性回复率。