Study on the Frictional Characteristics of Micro-particles for Tribological Application

Title
Study on the Frictional Characteristics of Micro-particles for Tribological Application
Authors
성인하한흥구공호성
Keywords
atomic-scale stick-slip friction; colloidal probe; lateral contact stiffness
Issue Date
2009-04
Publisher
한국윤활학회지; Journal of the KSTLE (Journal of the Korean Society of Tribologists and Lubrication Engineers)
Citation
VOL 25, NO 2, 81-85
Abstract
Interests in micro/nano-particles have been greatly increasing due to their wide applications in various fields such as environmental and medical sciences as well as engineering. In order to obtain a fundamental understanding of the tribological characteristics at particle-surface contact interface, frictional behaviors according to load/pressure and materials were obtained by using atomic force microscope (AFM) cantilevers with different stiffnesses and tips. Lateral contact stiffnesses were observed in various tip-surface contact situations. Experimental results show that stick-slip friction behavior occurs even when the colloidal probes with a particle of a few micrometers in diameter, which have a relatively large contact area and lack a well-shaped apex, were used. This indicates that atomic stick-slip friction may be a more common phenomenon than it is currently thought to be. Also, experimental results were investigated by considering the competition between the stiffness of the interatomic potential across the interface and the elastic stiffnesses of the contacting materials and the force sensor itself.
URI
http://pubs.kist.re.kr/handle/201004/35048
ISSN
1229-4845
Appears in Collections:
KIST Publication > Article
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