WTC2005-63602 EFFECTS OF TUBE DIAMETER ON FRICTIONAL CHARACTERISTICS OF CARBON NANOTUBES

Abstract

ABSTRACT Frictional characteristics of carbon nano-tube powders were measured and compared with those of conventional solid lubricants, MoS 2 and graphite. In linear one way sliding tests, a multi-wall CNT showed similar coefficient of friction with graphite. It was also showed that the larger the particle sizes, the smaller the COF for those powders. A sliding model considering CNT geometry was proposed. INTRODUCTION Carbon nano-tubes (CNTs) are now studied extensively for mechanical applications to utilize their high strength and high elastic modulus in addition to electrical and thermal applications One report showed the coefficient of friction (COF) of 0.3 for a multi-wall CNT (MWCNT) fil