Abstract
AbstractAmorphous carbon nitride(a‐CNx) 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‐CNx coatings were measured with contact angle meter. The friction and wear behaviours of the a‐CNx/SiC tribopairs in ethylene glycol aqueous solution were investigated with ball‐on‐disk tribometer. The results indicated that the a‐CNx coatings contained 12at. % nitrogen and their bonding structure consisted of sp2C=N/C=C and sp3C–N bonds. The static contact angles on the a‐CNx 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 mm3 Nm−1, while that of a‐CNx coatings varied in the range of 3.3 × 10−8∼7.8 × 10−8 mm3 Nm−1. Copyright © 2010 John Wiley & Sons, Ltd.
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