期刊
TRIBOLOGY INTERNATIONAL
卷 60, 期 -, 页码 198-208出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2012.11.009
关键词
Polymeric coating; PTFE; Indentation; Microstructure
资金
- Air Conditioning and Refrigeration Center (ACRC), an Industry-University Cooperative Research Center at the University of Illinois at Urbana-Champaign
- U.S. Department of Energy [DEFG02-96-366ER45439]
- Major Research Instrumentation (MRI) NSF CMMI [09-23428]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [0923428] Funding Source: National Science Foundation
In earlier studies, PTFE-based coatings showed superb tribological performance under aggressive conditions, relevant to air-conditioning and refrigeration compressors. In this work, micromechanical properties of different polymeric coatings (PTFE-, PEEK-, resin- and fluorocarbon-based coatings) coated on gray cast iron, were examined using instrumented microindentation. The load-unload responses were used to measure the load-bearing properties of the coatings, as well as to extract their elastic modulus and hardness values. Induced structural differences between the PTFE- and PEEK-based coatings were confirmed using scanning electron microscopy. These measurements were used to explain the difference in the tribological performance between PTFE- and PEEK-based coatings. Such correlation is useful as simpler indentation experiments could be readily performed, compared to more complex and application-specific tribological experiments. (C) 2012 Elsevier Ltd. All rights reserved.
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