TY - JOUR
T1 - The effects of contact configuration and coating morphology on the tribological behaviour of tetrahedral amorphous diamond-like carbon (ta-C DLC) coatings under boundary lubrication
AU - Mishra, Tanmaya
AU - Nordin, Björn
AU - Svanbäck, Daniel
AU - Tervakangas, Sanna
AU - Prakash, Braham
N1 - Publisher Copyright:
© 2019, © 2019 Institute of Materials, Minerals and Mining and Informa UK Limited, trading as Taylor & Francis Group.
PY - 2019/4/3
Y1 - 2019/4/3
N2 - Tribological studies were carried out with tetrahedral amorphous diamond-like carbon (ta-C DLC) coatings, varying in thickness and roughness, using two different contact configurations lubricated with seven types of hydraulic oils. Tribopair of cast iron and ta-C coated steel were tested in both non-conformal and conformal, unidirectional sliding contacts. The friction and wear results were mainly affected by the thickness of the coating in the non-conformal contact and the surface roughness of the coating in the conformal contact. Tests done with mineral base oil containing rust inhibitor in the non-conformal contact and with Polyalphaolefins and synthetic ester base oils in the conformal contact resulted in the lowest friction while that with mineral base oil containing zinc resulted in high friction and counterface wear. The results highlight the interdependence of contact configuration, lubricant chemistry, coating’s surface morphology and coating’s thickness in determining the tribological behaviour of ta-C coatings under boundary lubrication.
AB - Tribological studies were carried out with tetrahedral amorphous diamond-like carbon (ta-C DLC) coatings, varying in thickness and roughness, using two different contact configurations lubricated with seven types of hydraulic oils. Tribopair of cast iron and ta-C coated steel were tested in both non-conformal and conformal, unidirectional sliding contacts. The friction and wear results were mainly affected by the thickness of the coating in the non-conformal contact and the surface roughness of the coating in the conformal contact. Tests done with mineral base oil containing rust inhibitor in the non-conformal contact and with Polyalphaolefins and synthetic ester base oils in the conformal contact resulted in the lowest friction while that with mineral base oil containing zinc resulted in high friction and counterface wear. The results highlight the interdependence of contact configuration, lubricant chemistry, coating’s surface morphology and coating’s thickness in determining the tribological behaviour of ta-C coatings under boundary lubrication.
KW - block-on-ring test
KW - boundary lubrication
KW - contact configuration
KW - Diamond-like carbon (DLC) coating
KW - DLC coating-iron contact
KW - pin-on-disc test
KW - tetrahedral amorphous carbon (ta-C) coating
KW - ultralow friction
UR - http://www.scopus.com/inward/record.url?scp=85063594603&partnerID=8YFLogxK
U2 - 10.1080/17515831.2019.1596627
DO - 10.1080/17515831.2019.1596627
M3 - Article
AN - SCOPUS:85063594603
SN - 1751-5831
VL - 13
SP - 120
EP - 129
JO - Tribology - Materials, Surfaces and Interfaces
JF - Tribology - Materials, Surfaces and Interfaces
IS - 2
ER -