The tribological behaviors of Ti-Ni51.5 at% alloy strengthened by finely dispersed Ni₄Ti₃ particles in reciprocating sliding against GCr15, Al₂O₃, and ZrO₂ at room temperature were studied. Interestingly, the coefficient of friction (COF) suffered a sheer drop (from 0.9 to 0.2) when the aged alloy slid against GCr15 at a frequency of 20 Hz under a 20 N load without lubrication. However, severe-mild wear transition disappeared when a solutionized alloy was used. Moreover, the COF stabilized at a relatively high level when Al₂O₃ and ZrO₂ were used as counterparts, although their wear mechanisms showed signs of oxidation. Scanning electron microscopy (SEM) and X-ray element mappings of the wear scars of the counterparts clearly indicate that the formation of well-distributed tribo-layer and material transfer between the ball and disk are pivotal to the severe-to-mild wear transition in the aged Ti-Ni51.5 at% alloy/GCr15 friction pair. The higher microhardness and superelasticity of the aged alloy significantly accelerate the material transfer from GCr15 to the disk, forming a glazed protective tribo-layer containing Fe-rich oxides.

研究了细分散的Ni ₄ Ti ₃颗粒在室温下与GCr15，Al ₂ O ₃和ZrO ₂往复滑动时增强的Ti-Ni51.5 at％合金的摩擦学行为。有趣的是，当时效合金在20 N负载下以20 Hz的频率在不润滑的情况下以20 Hz的频率与GCr15滑动时，摩擦系数（COF）急剧下降（从0.9降至0.2）。但是，当使用固溶合金时，严重的轻度磨损过渡消失了。此外，当Al ₂ O ₃和ZrO ₂时，COF稳定在较高水平。尽管它们的磨损机制显示出氧化迹象，但它们被用作配对材料。扫描电子显微镜（SEM）和对应零件的磨损痕迹的X射线元素图清楚地表明，分布均匀的摩擦层的形成以及球和圆盘之间的材料转移对于从严重到轻度的磨损过渡至关重要在时效Ti-Ni51.5 at％合金/ GCr15摩擦副中。时效合金的较高显微硬度和超弹性显着加快了材料从GCr15到圆盘的转移，形成了一层含富铁氧化物的保护性摩擦玻璃层。