Lamellar lubrication in vivo and vitro: Friction testing of hexagonal boron nitride

Importance of bearing porosity in engineering and natural lubrication

“…the multibilayer membrane on articular surfaces, is an important factor in enabling frictionless work under load (Hills, 1989). The articular surface is consistent with f = 0.005 that characterizes 'lamellated solid lubrication' such as that found in graphite, MoS 2 , h-BN and WS 2 Martin et al, 1992;Deacon and Goodman, 1958;Rapoport et al, 2002;Ladavière et al, 2003;Pawlak et al, 2008).…”

Boron nitride nanotube reinforced hydroxyapatite composite: Mechanical and tribological performance and in-vitro biocompatibility to osteoblasts

“…The increase in the lateral force with a constant normal force causes higher CoF for HA-BNNT. Hexagonal boron nitride sheet is known as a good lubricator and its presence is reported to decrease the CoF of the system (Pawlak et al, 2008(Pawlak et al, , 2009. Hence, increase in CoF in HA-BNNT could be due to absence of peeled off h-BN sheet on wear track.…”

Effects of Non-metallic Inclusions on Machinability of Free-Cutting Steels Investigated by Nano-Indentation Measurements

“…Pawlak et al [46] and Kimura et al [47] have revealed that BN is effective in reducing wear if used as a lubricant additive. Pawlak et al [48] also showed that the addition of BN to the oil decreased the friction coefficient about twice compared to self-lubricated bearings lubricated only by oil.…”