Superlow friction with CNx coating under oil lubrication

被引：0

作者：

Ogawa, Yuichiro ^{[1
]}

Tokoroyama, Takayuki ^{[1
]}

Umehara, Noritsugu ^{[1
]}

Fuwa, Yoshio ^{[1
]}

机构：

[1] Department of Mechanial Science and Engineering, Nagoya University, Furocho, Chikusaku, Nagoyashi, Aich

来源：

Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C | 2009年 / 75卷 / 752期

关键词：

Carbon nitride; Hydrophobicity; Lubrication; PAO; Running-in;

D O I：

10.1299/kikaic.75.1088

中图分类号：

学科分类号：

摘要：

Recent investigations have confirmed that CNX (Carbon Nitride) coating showed superlow friction coefficient'when it slid against a Si 3N4 ball in N2. However, superlow friction was not kept when it lubricated. It was considered that lubricant oil swept the transfer film. To clarify superlow fiction possibility of CNX coating using under PAO (polyalphaolefins), we prepared 4 different friction pairs as ( a) as-deposit CNX vs. a Si3N4 ball, (b) as-deposit CNX vs. CNX transfer layer on a Si 3N4 ball, ( c ) CNX surface rubbed under N 2 blowing vs. a Si3N4 ball, and (d) CN X surface rubbed under N2 blowing vs. CNX transfer layer on a Si3N4 ball. We investigated the effect of running-in, or to do the effect of CNX transfer layer, on friction coefficient under PAO. In the case of using CNX surface rubbed under N2 blowing to friction test, the lowest friction coefficient was obtained approx. 0.017 in PAO. In order to know the differences of CNX coatings' surface energy, which was before and afer rubbing under N2 blowing, we measured contact angles of water and CH 2I2 droplet on as-deposit CNX and inside of wear track to calculate hydrogen bond component and dispersion force component. The CNX coating after sliding under N2 blowing indicated higher dispersion force component value than as-deposit CNX. It seemed to be a hydrophobic surface. We assumed that the hydrophobicity made the CNX low friction coefficient surface rather than as-deposit CN X.

引用

页码：1088 / 1093

页数：5

共 9 条

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