Friction control between CNx coating and stainless steel ball with electric field

Author

Umehara, Noritsugu ; Yamamoto, Takahiro

Author_Institution

Dept. of Mech. Sci. & Eng., Nagoya Univ., Japan

fYear

2005

fDate

7-9 Nov. 2005

Firstpage

213

Lastpage

216

Abstract

CNx showed ultra low friction that friction coefficient was less than 0.01 sliding against Si₃N₄ ball in Nitrogen. However it can not show low friction in air. In order to obtain low friction of CNx coating sliding against stainless steel in air, we applied DC electric voltage to stainless steel. As a result, we showed the possibility of decreasing friction and wear of CNx sliding against stainless steel. Friction coefficient decreased with the increasing negative voltage to apply to the ball and disk in air. On the other hand, positive voltage increased friction coefficient. Friction coefficient of CNx in air decreased from 0.22 to 0.05 by applying electric voltage of DC -200 V. Specific wear rate was decreased with the increasing applied positive and negative voltage. Specific wear rate of CNx in air decreased from 2.86×10^-8 mm³/Nm to 1.10×10^-8 mm³/Nm by applying electric voltage of DC -200 V.

Keywords

carbon compounds; coatings; electric fields; friction; wear; wear testing; -200 V; CNx coating; DC electric voltage; Si₃N₄; electric field; friction coefficient; friction control; stainless steel ball; ultra low friction; Ball bearings; Coatings; Dielectrics; Electric potential; Friction; Ion beams; Oxidation; Steel; Testing; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Micro-NanoMechatronics and Human Science, 2005 IEEE International Symposium on

Print_ISBN

0-7803-9482-8

Type

conf

DOI

10.1109/MHS.2005.1589992

Filename

1589992