Abstract The use of lubricants in the friction pairs that accelerate oxidation processes at the same time with their heating lead to mechanical destruction, as well as to a catalytic and electrochemical effect of the friction surfaces. Also, the current tendency to separate oxidation products and stabilize them in a meta-stable state leads to the same effect. As a result, experimental tests on friction pairs (steel/bronze, journal bearing type), has confirmed that it is useful to be done quickly thermodynamic unstable processes both inside the lubricant (here glycerine) and on the surfaces of the friction pairs, at the beginning of the friction process. This supposes, that in operating conditions unfold physical-chemical processes that are friction favorable, such as polymerized, formation of active substances at the contact surfaces, the formation of colloids and of other compounds with low resistance to tangential stress (shear). The friction in such conditions takes place with the selective mass transfer (SMT), and it is used there where the friction of the mixed layers and adhesion is not safe enough, or the friction pairs durability is not assured. SMT uses the positive effect of friction through the physical-chemical processes that take place in the contact areas of the friction pairs and allows the transfer of some elements of the materials from one surface to the other, forming a thin, superficial layer, with superior properties at minimal friction and wear. The purpose of this paper is to analyze the physical-chemical parameters and the suitable processes for initiation and achieving the selective mass transfer (IASMT) for the steel/bronze pair, which in optimal conditions, forms on the contact surfaces, a thin layer (tribofilm), in whose structure predominate copper. Also, are presents some studies and research concerning the tribological behavior of the surfaces of a friction pair with contact on the surface (journal bearing) which operates with SMT tested on the sliding bearing tribometer.

中文翻译：

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具有选择性传质功能的钢/青铜摩擦副（轴颈轴承类型）的摩擦学行为

摘要 在摩擦副中使用润滑剂在加热的同时加速氧化过程会导致机械破坏，以及摩擦表面的催化和电化学效应。此外，目前将氧化产物分离并将它们稳定在亚稳态的趋势导致了相同的效果。因此，对摩擦副（钢/青铜、轴颈轴承类型）的实验测试已经证实，在润滑剂（此处为甘油）内部和摩擦副表面上快速完成热力学不稳定过程是有用的，在摩擦过程的开始。这假设，在操作条件下展开有利于摩擦的物理化学过程，例如聚合，在接触表面形成活性物质，胶体和其他对切向应力（剪切）的抵抗力低的化合物的形成。这种条件下的摩擦是通过选择性传质（SMT）发生的，它用于混合层的摩擦和粘附不够安全的地方，或者摩擦副的耐久性没有保证的地方。SMT 通过发生在摩擦副接触区域的物理化学过程来利用摩擦的积极作用，并允许材料的某些元素从一个表面转移到另一个表面，形成一个薄的表面层，具有优越的性能摩擦和磨损最小的特性。本文的目的是分析钢/青铜对的物理化学参数以及引发和实现选择性传质 (IASMT) 的合适工艺，在最佳条件下，在接触表面上形成薄层（摩擦膜），其结构中以铜为主。此外，还介绍了一些关于接触表面（轴颈轴承）的摩擦副表面的摩擦学行为的研究和研究，该表面与 SMT 一起在滑动轴承摩擦计上测试。