Investigations on effectiveness of transfer layer on specific wear rate and coefficient of friction during dry sliding of hybrid polymer matrix composites

Abstract

The formation of transfer layer especially in polymer-based composites is unavoidable and essential to investigate the effectiveness of transfer layer under working conditions as it decides the material removal between mating parts. The main aim of the present work is to analyze the performance of transfer layer on specific wear rate (SWR) and coefficient of friction (COF) during dry sliding of hexagonal boron nitride (h-BN)/prosopis juliflora (PJ) reinforced polymer matrix composite. The mechanical test results exhibited that 136.4%, 145.7%, and 106.2% improvement in hardness, tensile and flexural properties of the hybrid composites compared to pure epoxy. Pin on disc wear test results showed that 15 wt% of h-BN and 5 wt% of PJ reinforced hybrid composite produced better wear performance of minimum COF as 0.0912 and SWR as 0.0000151 mm 3 /Nm. ANOVA analysis results showed that load is major contributing parameter on COF and SWR and their percentage of contribution as 25.40% and 79.38% respectively. Worn surface analysis revealed that the reason behind transfer layer formation and its effectiveness under sliding conditions. The major wear mechanisms are identified as micro cutting and micro plowing followed by matrix crack, fiber debonding, and fiber pull out.

Evaluation of the physical, mechanical, water absorption, and tribological behavior of pineapple leaf fiber/roselle fiber reinforced vinyl ester hybrid composites for non‐structural applications

“…By using a pin‐on‐disc tribometer wear tester, the depth of wear and frictional force properties were measured (Model: DUCOM TR‐20). As per the ASTM G99‐05 standard, 25 the composite pins were prepared and tested against EN 31 hardened steel under dry sliding conditions. Two tests were taken for each sample on the top and bottom areas of the pin, and the average was noted as a result.…”

Friction and wear characteristics of Furcraea foetida fiber‐reinforced epoxy composites

“…At 80 N applied load, the SEM analysis revealed a low occurrence of delamination and a high occurrence of plowing on the worn surface of the composite material, which showed a reduction in the SWR, as the plowing effect aided in reducing the severity of abrasive wear, leading to the formation of a transfer layer on the surface. The presence of the transfer layer reduced the frictional force and minimized the contact between the abrasive particles and composite material, thus reducing the wear rate 62 . SEM analysis of the composite material under an applied load of 100 N revealed the occurrence of fiber breakage, delamination, and plowing on the worn surface.…”

“…The presence of the transfer layer reduced the frictional force and minimized the contact between the abrasive particles and composite material, thus reducing the wear rate. 62 SEM analysis of the composite material under an applied load of 100 N revealed the occurrence of fiber breakage, delamination, and plowing on the worn surface. Fiber breakage and delamination increased the SWR by exposing the underlying matrix material to wear, whereas plowing reduced the SWR by removing the material from the surface and smoothing out the roughness.…”

Effect of core–shell structured SiO2@MoS2 on the tribological properties of epoxy resin/carboxyl terminated butadiene acrylonitrile composites

“…It has been found out that released particle fillers in sliding interface contributed to the formation of transfer films on the counter steel surface. [37][38][39] To identify this role, the chemical composition of transfer films formed during the sliding of 6CSs/EPC15 composite against steel was characterized by using XPS (Figure 11). The peaks at 284.8 and 288.5 eV in the C1s spectrum can be ascribed to C atoms in C C and C O, respectively (Figure 11A).…”