Journal
TRIBOLOGY INTERNATIONAL
Volume 97, Issue -, Pages 200-211Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2016.01.026
Keywords
Compressor; Polymeric coating; Refrigerant; ATSP/PTFE
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Funding
- Air-Conditioning and Refrigeration Center, an Industry University Cooperative Research Center at the University of Illinois at Urbana Champaign [ACRC-287]
- U.S. Department of Energy [DEFG02-96-ER45439]
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We report on the tribological performance of an aromatic thermosetting polyester (ATSP) blended with polytetrafluroethylene (PTFE) as a coating material for air-conditioning compressor applications. Tribological experiments were conducted in the presence of environmentally friendly r1234yf refrigerant and polyalkyleneglycol (PAG) lubricant, to compare state-or-the-art polymeric coatings with ATSP/PTFE. Results showed better performance for ATSP/PTFE, compared to PTFE-based and Fluorocarbon- based coatings under both dry and boundary lubricated sliding conditions. Significant reduction of 69% in friction was obtained with the inclusion of PAG lubricant, suggesting a synergistic combination for ATSP/PTFE and PAG/r1234yf. Morphological evolution via scanning electron microscopy revealed surface cracks and voids for PTFE/MoS2, responsible for negative interactions under lubricated condition, which was not the case for ATSP/PTFE coating. (C) 2016 Elsevier Ltd. All rights reserved.
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