Friction of Undulated Surfaces Coated with MoS2by Pulsed Laser Deposition
作者:
Mohsen Mosleh,
SamuelJ. P. Laube,
NamP. Suh,
期刊:
Tribology Transactions
(Taylor Available online 1999)
卷期:
Volume 42,
issue 3
页码: 495-502
ISSN:1040-2004
年代: 1999
DOI:10.1080/10402009908982246
出版商: Taylor & Francis Group
关键词: Solid Lubricant;Molybdenum Disulfide;Wear Particles;Plowing
数据来源: Taylor
摘要:
Solid lubricants such as molybdenum disulfide can provide very low friction, but their effectiveness especially in the geometrically constrained sliding pairs is limited by plowing of coated surfaces by wear particles. Even in the presence of solid lubricants wear particles cause higher friction by plowing the interface. To minimize plowing, undulated surfaces with microgrooves perpendicular to the sliding direction can be used to trap wear particles. Smooth and undulated stainless steel surfaces were coated with molybdenum disulfide by pulsed laser deposition (PLD) and friction tested. Under identical test conditions, the friction coefficient of coated undulated surfaces is between 20–40 percent lower than that of coated smooth surfaces. The friction coefficient of undulated uncoated surfaces is about 100–350 percent less than that of smooth uncoated surfaces. Moreover, the entrapment of wear particles at the interfaces of geometrically constrained bearings may lead to seizure even when bearing surfaces are coated with solid lubricants. The use of undulated surf aces on these sliding systems has shown improved operating time and a reduced maintenance cycle.Presented at the 53rd Annual Meeting in Detroit, Michigan May 17–21, 1998
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