Tribological properties of MoS2 nano-balls as filler in polyoxymethylene-based composite layer of three-layer self-lubrication bearing materials

On Some Mechanical Properties and Wear Behavior of Sintered Bronze Based Composites Reinforced with Some Aluminides Microadditives

“…These microparticulates in the process of wear are concentrated at the "hardened steel  composite" interfaces, forming a kind of load-bearing elements. A similar effect was described by Díaz [10]; Hua et al [21]; Dyachkova and Feldshtein [22]; Feldshtein et al [23]. Due to this effect, as well as to the guaranteed presence of oil on the friction surfaces, the wear rate of composites is reduced significantly.…”

Nanocomposites of Polyoxymethylene

“…Th e size and morphology dependence of chemical and catalytic activity of nanomaterials are well depicted in the exemplary observations of Hu et al It was found that the POM blended with MoS 2 nanoslices with size of ~30 nm or ~50 nm underwent intensive degradation at ~150 ºC, so that those MoS 2 nanoslices could not be introduced into POM, but blending ball-shaped MoS 2 nanoparticles at 185 ºC were stable [77]. Hu et al also showed strong catalytic activity of opened MoS 2 nanoslices towards S 2-oxidation into SO 4 2-, while low catalytic activity was found for MoS 2 nanoballs [78].…”

“…Because they are of the same size scale as counterface asperities, they may polish the highest asperities and promote the development of tribologically favorable transfer fi lms [12,79,80]. Recently several types of nanoparticles have been used to modify the tribological properties of POM, e.g., molybdenium disulfi de nanoballs (MoS 2 ) [77], fullerene soot [32], nanosilica [81] and nano-copper [82].…”

“…Th e comparative study of the POM-based composite blended with micro-and nano-MoS 2 particles was tested as the polymeric layer in the three-layer self-lubrication materials [77]. Th e obtained POM/MoS 2 nanocomposites presented better tribological properties than that with micro-MoS 2 at volume fraction equal or lower than 1 wt%.…”

Polyoxymethylene Additives

“…Al 2 O 3 [115] increases both friction coefficient and wear volume. MoS 2 was shown to be poorly effective even if a slight decrease in friction coefficient was observed when using nanoballs instead of microballs [116]. A combination of aromatic vinyl modified polyethylene and fatty acid ester can also be used for POM improving sliding performances [117].…”