Tribological performance of polymer composites used in electrical engineering applications

Abstract

Sliding wear performance of 20% mica-filled polyamide 6 (PA6 + 20% mica) and 20% short glass fibrereinforced polysulphone (PSU + 20 GFR) polymer composites used in electrical applications were investigated using a pin-on-disc wear test apparatus. Two different disc materials were used in this study. These are AISI 316 L stainless steel and 30% glass fibre-reinforced polyphenylenesulphide (PPS + 30%GFR) polymer composite. Wear test was carried out at 10, 20 and 30 N applied load values and 0•5 m/s sliding speed and at ambient temperature and humidity. Different combinations of rubbing surfaces were examined and friction coefficient and specific wear rate values were obtained and compared. For two material combinations used in this investigation, the coefficient of friction shows insignificant sensitivity to applied load values and large sensitivity to material combinations. For specific wear rate, PA6 + 20% mica composite has shown insensitivity to change in load, speed and materials combination while PSU + 20% glass fibre composite has shown high sensitivity to the change in load and material combinations. The friction coefficient of PA6 + 20% mica and PSU + 20 glass fibre rubbing against the AISI 4140 steel disc is between 0•35 and 0•40. In rubbing against PPS + 30% glass fibre their values were between 0•25 and 0•30. Specific wear rate for PA6 + 20% mica and PSU + 20% glass fibre composites are in the order of 10 −13 to 10 −14 m 2 /N. Finally, the wear mechanisms are a combination of adhesive and abrasive wear processes. In terms of application, especially in electrical systems, a substantial contribution was provided to extend switch life. Thus, besides robustness, this also ensured safety for the system and the users against undesirable situations.

Experimental investigation on tribological behaviours of PA6, PA6-reinforced Al2 O 3 and PA6-reinforced graphite polymer composites

“…Moreover, Al 2 O 3 particles disc and the important properties of heat and wear are produced on the contact surface of the specimen. The sliding contact of two materials results in heat generation at asperities and hence increases the temperature [25]. Al 2 O 3 particles have a high hardness of 1100 kg mm −2 [26] and high thermal conductivity (30 Wm −1 K −1 ) [27].…”

Wear Behavior of Rockforce Mineral Fiber and Mica Reinforced Polyamide-6 Composite against Thermoset Polyester Composite Disc

“…Çalışma sonucunda cam elyaf ve 7 (2) [23][24][25][26]. Ancak, endüstriyel uygulamaların birçoğunda birbiri ile temaslı çalışan polimerlere veya polimer kompozitlere oldukça fazla rastlanmasına rağmen literatürde bu konuda oldukça az çalışmaya rastlanmaktadır [4,27]. Unal ve arkadaşları [4] pim-disk aşınma cihazı kullanarak farklı oranlarda (% 0-30) mika katkılı PA-6 kompozitlerin aşınma ve sürtünme davranışlarını incelemişlerdir.…”

“…Ayrıca uygulanan yük artışına bağlı olarak da mika katkılı poliamid-6 esaslı kompozitlerin sürtünme katsayısı ve aşınma oranı değerlerinin arttığını belirtmişlerdir. Demir [27] ise ağırlık olarak % 20 oranında mika katkılı PA-6 polimer kompoziti (PA-6+%20Mika) ile %20 oranında kısa cam elyaf takviyeli polisülfon (PSU+%20CE) polimer kompozitlerin aşınma ve sürtünme davranışlarını incelemiştir. Çalışmasında karşı disk malzeme olarak iki farklı malzeme kullanmıştır.…”

Effective viscoelastic behavior of short fibers composites using virtual DMA experiments

“…The literature shows that a great range of high-end matrices are usually studied: amorphous PC (Polycarbonate) (Haskell et al 1983, Chrysostomou andHashemi 1996), PSU (Polysulfone) (Wenz et al 1990, Demir 2013, or semicrystalline PEEK (Polyetheretherketone) (Crevel, Jeremy 2014,Garcia-Gonzalez et al 2015. The polycarbonate (PC) present the advantage of being already widely used in the industry.…”