Friction reduction efficiency of organic Mo-containing FM additives associated to ZDDP for steel and carbon-based contacts

Abstract

International audienc

MoS2 formation induced by amorphous MoS3 species under lubricated friction

“…24 Another route for MoDTC decomposition through C-S bond cleavage was also suggested by Coffey et al 25 However, few studies have been performed on amide molybdate. [16][17][18][19][20][21] This work focuses on the combination of amide molybdate, ZDDP, and fatty triamine. Our aim is to understand the intermediates involved in MoS 2 formation under friction of this ternary mixture of components.…”

A Study on the Tribofilm Growth and Tribological Properties of Tribofilms Formed from Zinc Dialkyl Dithiophosphate (ZDDP) and Molybdenum Dialkyl Dithiocarbamate (MoDTC)

“…Studies of the nature of tribofilms that are formed from ZDDP and MoDTC have been carried out over several decades [1][2][3][4][5][6]. Many studies have focused on the physical and chemical nature of tribofilms, particularly of elements such as Zn, S, and P, to obtain an improved understanding of and to improve lubricant performance [7][8][9]. Various techniques have been applied to study the tribofilms.…”

Tribological properties of Ti‐doped diamond‐like carbon coatings under dry friction and PAO oil lubrication

“…For example, Kano et al reported that ultralow friction coefficient (0.03) was obtained by sliding hydrogen‐free tetrahedral amorphous carbon (ta‐C) against ta‐C when PAO containing glycerol mono‐oleate additive was used as lubricant, and revealed that the formation of OH − terminated DLC surface was the key factor to this friction phenomena. However, Gorbatchev et al observed that dithiocarbamates reduced friction and wear for DLC/DLC mating contact, but its lubrication effect faded due to the severe chemical wear for DLC/steel contact surface. As to Ti‐DLC coating, some studies also showed low friction and wear under oil lubrication condition.…”

“…Recently, many researches have focused on the interaction between the DLC coatings and lubricating oil (mainly base oil poly-alpha-olefin (PAO), extreme-pressure additives, and friction-modifier additives) to explore the solid-liquid composite lubrication behavior. [14][15][16][17] For example, Kano et al 18 reported that ultralow friction coefficient (0.03) was obtained by sliding hydrogen-free tetrahedral amorphous carbon (ta-C) against ta-C when PAO containing glycerol mono-oleate additive was used as lubricant, and revealed that the formation of OH − terminated DLC surface was the key factor to this friction phenomena. However, Gorbatchev et al 17 observed that dithiocarbamates reduced friction and wear for DLC/DLC mating contact, but its lubrication effect faded due to the severe chemical wear for DLC/steel contact surface.…”