Bio-based ionic liquid crystal for stainless steel-sapphire high temperature ultralow friction
In the present work, the biobased protic ionic liquid crystal bis(2-hydroxyethyl) ammonium palmitate (DPA) has been studied as neat lubricant under linear reciprocating sliding at 75 °C, in the liquid crystalline region, and at 110 °C, above its melting point. Three different tribopairs have been st...
Saved in:
Published in | Wear Vol. 484-485; p. 204020 |
---|---|
Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
15.11.2021
Elsevier Science Ltd |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | In the present work, the biobased protic ionic liquid crystal bis(2-hydroxyethyl) ammonium palmitate (DPA) has been studied as neat lubricant under linear reciprocating sliding at 75 °C, in the liquid crystalline region, and at 110 °C, above its melting point. Three different tribopairs have been studied using AISI 52100 steel, AISI 316L stainless steel and sapphire balls against AISI 316L disks. Tribological results at 75 °C are in agreement with the different sliding pairs and contact conditions. At 110 °C, a sharp friction coefficient reduction to reach an ultralow steady state value of 0.007–0.009, is observed for the sapphire-AISI 316L contact. Wear rate is also reduced in one order of magnitude. Results are related to water content in DPA, as determined by TG-MS. Wear mechanism are discussed upon the basis of optical and scanning electron microscopy (SEM/EDX) and of surface analysis by XPS.
•DPA reaches ultralow steady state friction at 110 °C for sapphire-steel.•Friction and wear of sapphire-steel lubricated with DPA are lower at 110 °C than at 75 °C.•Water loss and surface analysis are related to tribological performance. |
---|---|
ISSN: | 0043-1648 1873-2577 |
DOI: | 10.1016/j.wear.2021.204020 |