TY - JOUR
T1 - Influences of ceramic mating balls on the tribological properties of Cr/a-C coatings with low chromium content in water lubrication
AU - Wang, Qianzhi
AU - Zhou, Fei
AU - Ding, Xiangdong
AU - Zhou, Zhifeng
AU - Zhang, Wenjun
AU - Li, Lawrence Kwok-Yan
AU - Lee, Shuit-Tong
PY - 2013/6/15
Y1 - 2013/6/15
N2 - The influences of ceramic mating balls (SiC, Si3N4, Al2O3) on the tribological properties for hydrogen-free amorphous carbon (a-C) coatings and Cr/a-C coatings with low Cr content (3at%) in water lubrication were investigated. The composition and microstructure of a-C and Cr/a-C coatings were characterized by X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy, respectively, and the mechanical and water-lubricated tribological properties were investigated using nano-indenter and ball-on-disc tribo-meter. The results revealed that the sp3/sp2 ratio of the Cr/a-C coatings increased, while the hardness and water wetting contact angle for the Cr/a-C coatings decreased in comparison to those of a-C coatings. The ranking of friction coefficients for a-C/balls and Cr/a-C/balls tribopairs was μmSiC>μmSi3N4>μmAl2O3, which was determined by the interactive effects among mechanical properties, hydration reaction and contact pressure for coatings/balls tribopair. The specific wear rates of Cr/a-C coatings were slightly higher than those of a-C coatings. © 2013 Elsevier B.V.
AB - The influences of ceramic mating balls (SiC, Si3N4, Al2O3) on the tribological properties for hydrogen-free amorphous carbon (a-C) coatings and Cr/a-C coatings with low Cr content (3at%) in water lubrication were investigated. The composition and microstructure of a-C and Cr/a-C coatings were characterized by X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy, respectively, and the mechanical and water-lubricated tribological properties were investigated using nano-indenter and ball-on-disc tribo-meter. The results revealed that the sp3/sp2 ratio of the Cr/a-C coatings increased, while the hardness and water wetting contact angle for the Cr/a-C coatings decreased in comparison to those of a-C coatings. The ranking of friction coefficients for a-C/balls and Cr/a-C/balls tribopairs was μmSiC>μmSi3N4>μmAl2O3, which was determined by the interactive effects among mechanical properties, hydration reaction and contact pressure for coatings/balls tribopair. The specific wear rates of Cr/a-C coatings were slightly higher than those of a-C coatings. © 2013 Elsevier B.V.
KW - Carbon-based coatings
KW - Sliding friction
KW - Tribochemistry
KW - Wear testing
UR - http://www.scopus.com/inward/record.url?scp=84877024496&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84877024496&origin=recordpage
U2 - 10.1016/j.wear.2013.03.044
DO - 10.1016/j.wear.2013.03.044
M3 - RGC 21 - Publication in refereed journal
SN - 0043-1648
VL - 303
SP - 354
EP - 360
JO - Wear
JF - Wear
IS - 1-2
ER -