Premium
Tribological properties of a‐CN x coatings sliding against SiC balls in ethylene glycol aqueous solution
Author(s) -
Zhou Fei,
Yue Bin,
Wang Qianzhi,
Wang Xiaolei,
Koshi Adachi,
Kato Koji
Publication year - 2010
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.119
Subject(s) - ethylene glycol , materials science , x ray photoelectron spectroscopy , tribometer , aqueous solution , contact angle , tribology , amorphous solid , ethylene , analytical chemistry (journal) , nuclear chemistry , chemical engineering , composite material , crystallography , organic chemistry , chemistry , engineering , catalysis
Amorphous carbon nitride(a‐CN x ) coatings were deposited on SiC disks by using ion beam assisted deposition, and their bonding structure and hardness were determined using X‐ray photoelectron spectroscopy and nano‐indenter, respectively. The contact angles on the surface of the a‐CN x coatings were measured with contact angle meter. The friction and wear behaviours of the a‐CN x /SiC tribopairs in ethylene glycol aqueous solution were investigated with ball‐on‐disk tribometer. The results indicated that the a‐CN x coatings contained 12at. % nitrogen and their bonding structure consisted of sp 2 C=N/C=C and sp 3 C–N bonds. The static contact angles on the a‐CN x coatings decreased with the ethylene glycol concentration. The lowest coefficient of friction of 0.019 was acquired as the ethylene glycol concentration was 10vol. %. When the ethylene glycol concentration increased, the specific wear rate of the SiC ball fluctuated in the range of 5.9 × 10 −10 ∼1.1 × 10 −9 mm 3 Nm −1 , while that of a‐CN x coatings varied in the range of 3.3 × 10 −8 ∼7.8 × 10 −8 mm 3 Nm −1 . Copyright © 2010 John Wiley & Sons, Ltd.