Tribological Performance of CF-PEEK Sliding against 17-4PH Stainless Steel with Various Cermet Coatings for Water Hydraulic Piston Pump Application

Abstract

To improve the abrasion resistance performance of the critical tribopairs within water hydraulic piston pumps, tribological characteristics of the stainless steel 17‐4PH and 17‐4PH coated with Cr3C2‐NiCr, WC‐10Co‐4Cr, Cr2O3 and Al2O3‐13%TiO2 sliding against carbon fiber reinforced polyetheretherketone (CF‐PEEK) composite under water‐lubricated condition were experimentally studied using a pin‐on‐ring test bench with different working conditions. It has been demonstrated by the experimental results that the tribological behaviors of CF‐PEEK/cermet coatings tribipairs were better than that of CF‐PEEK/17‐4PH tribopair under water lubrication. However, the Cr3C2‐NiCr coating could be damaged under high rotational speed. Due to the reaction film produced by the Al2O3‐13%TiO2 and water, the CF‐PEEK/Al2O3‐13%TiO2 material combination exhibits more excellent tribological behaviors than other tribopairs lubricated with water, and could preferentially be used in water hydraulic piston pumps.

Evaluation of the tribological properties of two PEEKs sliding against Al2O3, WC and DLC coatings under dry friction and water lubrication

“…Amongst the eight tribopairs, the best-performing one is WG101/Al 2 O 3 coating tribopair, and wear rate is 6×10 −7 mm 3 /Nm, whereas the worst-performing one is 450FC30/DLC coating tribopair, and wear rate is 6.8×10 −6 mm 3 /Nm. The hardness of the PEEK is considerably lower than that of the DLC coating, accelerating the softening of the PEEK material and resulting in the poor wear resistance of the two CF-PEEK composites [12]. When silding with the WC coating, the wear rate of 450FC30 is less than that of WG101, and the wear rates of WG101 is less than that of 450FC30 in the other cases.…”

“…The first deficiency is the poor creep-resistance performance of pure PEEK that results in a short life span [11]. The second deficiency is the extremely poor hardness of stainless steel under severe working conditions [12]. To deal with these deficiencies, additives, such as glass fiber (GF), carbon fiber (CF), graphite and MoS2, are typically added to PEEK to address its poor creep [9,[13][14][15][16].…”

“…Nie et al [12] studied the tribological behaviour of carbon fiber-reinforced PEEK (CF-PEEK) and stainless steel with different types of cermet coatings. Their experiment results showed that under water lubrication, the tribological performance of the tribopair of CF-PEEK and cermet coating is better than that of the tribopair of CF-PEEK and stainless steel.…”

Impact of recovered silicon particles incorporation on tribo-characteristics of a poly ether ether ketone polymer composite

“…PEEK can be used in a variety of applications, but the main concern about PEEK is its moderate values of wear resistance and COF. 7 In addition, the low shear properties of PEEK during sliding lead to its wide variety of tribological applications. 8 However, it's very low shear characteristics make it challenging to obtain a low to ultra-low friction coefficient for high-performance polymers.…”

Reliability assessment of PEEK/17-4PH stainless steel tribopair under seawater lubrication

“…In the latter, the materials have shown a significant potential for friction and wear resistance under seawater. [12][13][14][15][16] For instance, Chen et al 18 analyzed the load effect of Si 3 N 4 -hBN ceramic/polyether ether ketone (PEEK), Carbon fiber reinforced polyether ether ketone (CF-PEEK), 17-4PH and 17-4PH coated with Cr3C2-NiCr, WC-10Co-4Cr, Cr2O3, and Al2O3-13%TiO2, respectively. These materials were also investigated by Nie et al, 17 in order to improve the abrasion resistance performance of the critical tribopairs of water hydraulic piston pump.…”