Selection of ceramics for methanol fuel injector plungers based on tribological characteristics when coupled with 4140 steel |
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| Affiliation: | 1. Department of Chemical Engineering and Materials Research Institute, Pennsylvania State University, University Park, PA 16802, USA;2. Korea Institute of Industrial Technology, 89 Yangdaegiro-gil, Ipjang-myeon, Seobuk-gu, Cheonan-si, Chungcheongnam-do 331-822, Korea;1. Centre for Advanced Studies & Research in Automotive Engineering, Delhi Technological University, Bawana Road, Delhi, India;2. Department of Mechanical Engineering, Raj Kumar Goel Institute of Technology, Ghaziabad, India;1. Key Laboratory for Green Chemical Technology of State Education Ministry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China;2. PKU Health Care Corporation Limited, Chongqing 401121, People’s Republic of China;1. Department of Space Engineering & Rocketry, Birla Institute of Technology, Mesra, Ranchi, India;2. Department of Mechanical Engineering, Birla Institute of Technology, Mesra, Ranchi, India |
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| Abstract: | This research seeks to increase the working life of methanol fuel injectors by substituting wear- and corrosion-resistant ceramics for the current materials of construction. Because information on the tribological properties of ceramics in methanol is scarce, experiments were performed to characterize the dynamic friction and wear behavior of 11 oxides, nitrides and carbides against nitrided 4140 steel using a reciprocating test machine. The results are compared to baseline tests performed with typical injector construction materials (nitrided 51501 steel and nitrided 4140 steel) that have experienced early wear using methanol fuel. The tribological performance was characterized through measurements of the friction coefficient, mass loss, gross dimensional change and the roughness of the wear scar and by examinations with a scanning electron microscope. All of the ceramics were wear resistant, but many caused severe wear on the 4140 steel. A boron carbide and a nickel-bonded titanium carbide exhibited the best tribological characteristics. |
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