Experimental studies on relationships between the electron work function, adhesion, and friction for 3d transition metals
Experimental studies on relationships between the electron work function, adhesion, and friction for 3d transition metals
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DOI：
10.1063/1.1738531
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发表时间：
2004-06-15
影响因子：
3.2
通讯作者：
Li, DY
中科院分区：
文献类型：
--
作者：
Li, YP;Li, DY
报道了3d过渡金属的电子功函数（EWF）与附着力和摩擦力之间关系的实验研究。使用扫描开尔文探针测量EWF。采用原子力显微镜（AFM），也可以作为一个横向力显微镜（LFM）的功能之间的氮化硅尖端和样品表面的轻负载下的粘附力和摩擦力进行了评估。还使用微摩擦计测量了在较高载荷水平下尖锐尖端下的样品的摩擦。结果表明，EWF、附着力和摩擦力之间存在很强的相关性。较高的EWF对应于较低的粘附力，因此当使用AFM/LFM在轻载荷下测量时，对应于较低的摩擦。这种相关性源于这样一个事实，即测量的粘附力和摩擦力在很大程度上归因于样品和AFM/LFM尖端之间的内在相互作用，这是由EWF反映的电子行为所支配的。然而，当在更高载荷水平下在尖锐尖端下评价摩擦时，这种相关性变得更弱。在这种情况下，目标金属的摩擦行为主要由其机械行为决定。(C)2004年，美国物理学会。
Experimental studies on the relationships between the electron work function (EWF), adhesion and friction for 3d transition metals were reported. EWF was measured using a scanning Kelvin probe. Adhesion and friction under light loads between a silicon nitride tip and sample surfaces were evaluated employing an atomic force microscope (AFM) that may also function as a lateral force microscope (LFM). Friction of the samples under a sharp tip at higher load levels was also measured using a microtribometer. It was demonstrated that there was strong correlation between the EWF, adhesion and friction. Higher EWF corresponded to lower adhesive force and thus to lower friction when measured under light loads using the AFM/LFM. Such a correlation stems from the fact that the measured adhesion and friction are largely attributed to the intrinsic interaction between the sample and AFM/LFM tip, which is governed by the electronic behavior reflected by the EWF. However, such a correlation became weaker when the friction was evaluated under a sharp tip at higher load levels. In this case, the friction behavior of a target metal was mainly determined by its mechanical behavior. (C) 2004 American Institute of Physics.