Nano-Tribological and Wear Behavior of Boric Acid Solid Lubricant©
作者:
S. Mirmiran,
VladimirV. Tsukruk,
Ali Erdemir,
期刊:
Tribology Transactions
(Taylor Available online 1999)
卷期:
Volume 42,
issue 1
页码: 180-185
ISSN:1040-2004
年代: 1999
DOI:10.1080/10402009908982206
出版商: Taylor & Francis Group
关键词: Aluminum Industry Tribology;Atomic Force Microscopy;Boundary Lubrication Friction;Boundary Lubrication Wear;Adhesive Wear Borides;Lubricant Disposal and Recycling;Contact Mechanism/Surface Roughness;Friction Mechanism Solid Lubricants;Solid Lubrication Me
数据来源: Taylor
摘要:
One uses atomic force microscopy to explore the surface morphology, frictional characteristics (i.e., friction mapping) and surface adhesive forces of boric acid-treated aluminum surfaces. In earlier studies, boric acid was shown to be an effective solid lubricant providing 0.02 to 0.1 friction coefficients to the sliding surfaces of metallic and ceramic materials. In this study, the authors mainly focused on the friction and wear behavior of cleaved single crystals of boric acid. Tests were performed on uncoated and boric acid-coated surfaces of aluminum substrates, as well as the bulk boric acid material. The nano-scale wear of the boric acid crystals manifested itself in the displacement of atomic planes which, in turn, resulted in the formation of the worn area grown by a spiral-growth mechanism. In addition, new crystals in the vicinity of the sliding contact areas were formed. These crystals formed by a spiral dislocation mechanism. The nanoscale friction measurements showed that the friction coefficient of a Si3N4tip against the boric acid single crystal, was in the range of 0.07 to 0.13, depending on the sliding direction with respect to the crystallographic orientation. The friction coefficients of the boric acid-coated aluminum substrates varied between 0.11 and 0.19. While these values were consistent with earlier findings and further demonstrated the lubricity of boric acid, they were higher than the previous measurements (i.e., 0.011–0.1) obtained on a pin-on-disk machine using steel or ceramic pins. An explanation is provided for this phenomenon.Presented at the 53rd Annual Meeting in Detroit, Michigan May 17–21, 1998
点击下载:
PDF (1483KB)
返 回