Influence of counterface topography on sliding friction and wear of some elastomers under dry sliding conditions

Abstract

In this work, the friction and wear behaviour of acrylonitrile butadiene rubber (NBR), hydrogenated acrylonitrile butadiene rubber (HNBR), acrylate rubber (ACM), and fluoroelastomer (FKM) against steel surfaces under unidirectional dry sliding conditions have been studied. The influence of surface roughness of the steel counterface on friction and wear was studied using a block-on-ring test configuration. At low load, the friction coefficient decreased after a runningin period and the wear was insignificant, especially for the ACM and FKM. The running-in time in terms of achieving a stable dry friction for the different elastomers, from longest to shortest, is in the order HNBR, NBR, FKM, and ACM, with an exception in case of FKM sliding against a smooth steel counterface. At higher contact pressure, powdery worn particles on the ACM and a decrease in friction coefficient were observed, but for FKM and HNBR, worn particles with roll shapes were produced. The worn particles of FKM were significantly larger than those of the other tested materials, and a considerably higher wear in FKM was observed.

Temperature-dependent changes of physicochemical and tribological properties of acrylonitrile-butadiene rubber elastomer upon ageing in hexadecane and diethylene glycol dibutyl ether

“…The test procedure has been described in detail elsewhere. 27 Before each test, the sample surfaces were cleaned with heptane to remove possible contaminations due to the exposure to air. Care was taken to avoid any damage of sample surfaces.…”

The Potential of Tribological Application of DLC/MoS2 Coated Sealing Materials

“…Adhesion and deformation are the two most important mechanisms that are responsible for the frictional behaviors of elastomers [55,56]. The high friction of uncoated HNBR and NBR under dry conditions show that not only deformation, which can be related to the relatively low hardness, but also adhesion, which can be seen as a dissipative stick-slip process on molecular level, are influential factors for the dry frictional behaviors [57][58][59][60]. This is in good agreement with Rabinowicz's studies, which indicated that low ratios of surface energy/hardness are associated with better surface interactions and also less adhesion [61,62].…”

Friction and wear behavior of styrene butadiene rubber‐based composites reinforced with microwave‐devulcanized ground tire rubber

“…It is widely accepted that adhesion, which is the result of samples exhibiting stick‐slip behavior, plays a major role in the friction of materials exhibiting high modulus of elasticity. Additionally, hysteresis friction is the resulting behavior of samples when their internal friction is the more dominant component in the friction of materials with low moduli of elasticity . The wear behavior of rubber is a complex phenomenon and involves more than one mechanism.…”