Influence of Al2O3 particles on the friction and wear behaviors of nitrile rubber against 316L stainless steel

Abstract

Abstract:The friction and wear properties of nitrile rubber (NBR) against 316L stainless steel pairs were investigated by using a sphere-on-disc test device. The influence of Al 2 O 3 particle sizes and the normal load on the tribological behaviors of the pairs were primarily evaluated. The damage behaviors of worn surfaces were analyzed using a scanning electric microscopy (SEM) and a surface profilometer. The results show that the friction coefficient decreased because of particles coming into contact pairs, while particles also play an important role in increasing the wear loss of stainless steel with many furrows on the steel ball surface due to the ploughing effect of hard particles. Large-sized particles could accelerate the wear of rubber, and the micro-cutting scratches of the stainless steel induced by the Al 2 O 3 particles embedded in the rubber matrix. However, as the particle's size decreased, the wear loss of the rubber was gradually mitigated. It is obvious that the normal load affected the wear of the rubber to a larger extent than the stainless steel. Moreover, with large particles, the wear loss of rubber increased sharply with increasing the normal load. In addition, the NBR/stainless steel tribo-pairs presented different wear mechanisms, under different conditions, such as having no particles or varied particle sizes.

Abrasive wear behavior of PTFE for seal applications under abrasive-atmosphere sliding condition

“…That is, the COF is higher under the abrasive wear condition than that with no abrasive, which is mainly attributed to PTFE's excellent self-lubricating property. Thus, this result is opposite to the result from the investigation on rubber three-body abrasion previously performed by our research group [13].…”

“…The wear properties of PTFE and polyimide (PI) under two different conditions with simulated sand-dust and dry sliding were compared and studied by Li and Yan [12], and the results indicated that the wear rate of PTFE was much lower under sand-dust conditions than under dry sliding conditions, and that the two types of polymers exhibited different wear behaviors under sand-dust conditions. In our previous study [13], the authors explored different damage mechanisms and debris behavior for a crylonitrile-butadiene rubber (NBR) / -stainless steel tribo-pairs with varied particle sizes. As a general property, the particle size effect exists in two-body and three-body abrasion, as well as in abrasive erosion [14,15].…”

Tribological Behavior of the 316L Stainless Steel with Heterogeneous Lamella Structure

“…When the chemical wear regimes, such as oxidation wear mechanism, controlled the wear loss process, the deterioration in wear resistance could also be revealed for 316L stainless steels. The oxidative products can act as the relatively hard particle across the sliding interfaces, which can also play an important role in increasing material removals via forming plenty of furrows on the worn surface due to the ploughing effect of hard particles [ 33 , 34 ]. Recently, the 316L stainless steel and other alloys with heterogeneous lamella structure (HLS) containing lamellar coarse grains sandwiched between mixtures of nanotwins and nanograins, were constantly reported [ 35 , 36 , 37 , 38 ].…”

Fretting wear behavior of acrylonitrile–butadiene rubber (NBR) for mechanical seal applications

“…can be present at contact interface and fretting damage inevitably occurs on both rubbing surfaces [4,8]. Moreover, the degradation of hard metal surface can be aggravated as a counterpart if contamination particles are involved in the friction and wear between the rubber and metal [9].…”