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Nicholaos G. Demas
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Proceedings Papers

Tribological Effects of BN and MoS 2 Nanoparticles Added to Polyalphaolefin Oil in Piston Skirt/Cylinder Liner Tests

Nicholaos G. Demas, Elena V. Timofeeva, Jules L. Routbort, George R. Fenske
Proc. ASME. IJTC2012, ASME/STLE 2012 International Joint Tribology Conference, 5-7, October 7–10, 2012
Paper No: IJTC2012-61062
https://doi.org/10.1115/IJTC2012-61062
View Paper titled, Tribological Effects of BN and MoS 2 Nanoparticles Added to Polyalphaolefin Oil in Piston Skirt/Cylinder Liner Tests
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Topics: Cylinders, Nanoparticles, Pistons, Tribology, Friction, Cast iron, Wear, Tribological films, Aluminum alloys, Boron
Proceedings Papers

Effects of Surface Contamination Layers and Roughness on the Determination of Mechanical Properties of Thin Films Using Nanoindentation

Nicholaos G. Demas, Oyelayo O. Ajayi, Iqbal Shareef
Proc. ASME. IJTC2011, ASME/STLE 2011 Joint Tribology Conference, 13-15, October 24–26, 2011
Paper No: IJTC2011-61201
https://doi.org/10.1115/IJTC2011-61201
View Paper titled, Effects of Surface Contamination Layers and Roughness on the Determination of Mechanical Properties of Thin Films Using Nanoindentation
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Topics: Contamination, Mechanical properties, Nanoindentation, Surface roughness, Thin films, Coatings, Statistical analysis, Steel
Proceedings Papers

Effect of Cu Content on the Tribological Performance of Cr-N Coatings at High Temperatures (840°C)

Kyriaki Polychronopoulou, Claus Rebholz, Nicholaos G. Demas, Andreas A. Polycarpou, P. N. Gibson
Proc. ASME. IJTC2009, ASME/STLE 2009 International Joint Tribology Conference, 115-117, October 19–21, 2009
Paper No: IJTC2009-15189
https://doi.org/10.1115/IJTC2009-15189
View Paper titled, Effect of Cu Content on the Tribological Performance of Cr-N Coatings at High Temperatures (840°C)
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Topics: Coatings, High temperature, Tribology, Cathode rays, Disks, Electron beams, Mechanical properties, Nanoindentation, Photoelectron spectroscopy, Scanning electron microscopy
Proceedings Papers

Tribological Behavior of CrN and Al-Cr-N Coatings

Nicholaos G. Demas, Andreas A. Polycarpou, Kyriaki Polychronopoulou, Claus Rebholz
Proc. ASME. IJTC2008, STLE/ASME 2008 International Joint Tribology Conference, 769-771, October 20–22, 2008
Paper No: IJTC2008-71266
https://doi.org/10.1115/IJTC2008-71266
View Paper titled, Tribological Behavior of CrN and Al-Cr-N Coatings
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Topics: Coatings, Tribology, Cathode ray oscilloscopes, Disks, Electron beams, Evaporation, Mechanical properties, Nanoindentation, Photoelectron spectroscopy, Scanning electron microscopy
Proceedings Papers

Microstructure, Mechanical and Tribological Properties of Reactive Magnetron Sputtered Titanium Carbide Coatings

Kyriaki Polychronopoulou, Claus Rebholz, Nicholaos G. Demas, Andreas A. Polycarpou, Lefki Theodorou, Klaus Bo¨bel
Proc. ASME. IJTC2007, ASME/STLE 2007 International Joint Tribology Conference, Parts A and B, 933-935, October 22–24, 2007
Paper No: IJTC2007-44457
https://doi.org/10.1115/IJTC2007-44457
View Paper titled, Microstructure, Mechanical and Tribological Properties of Reactive Magnetron Sputtered Titanium Carbide Coatings
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Topics: Coatings, Titanium, Tribology, Carbon, Bonding, Elastic moduli, Flow (Dynamics), Mechanical properties, Photoelectron spectroscopy, Scanning electron microscopy
Proceedings Papers

Tribological Studies of Compressor Surfaces in the Presence of Carbon Dioxide Under Extreme Environmental Pressure Conditions

Nicholaos G. Demas, Andreas A. Polycarpou
Proc. ASME. WTC2005, World Tribology Congress III, Volume 1, 121-122, September 12–16, 2005
Paper No: WTC2005-63731
https://doi.org/10.1115/WTC2005-63731
View Paper titled, Tribological Studies of Compressor Surfaces in the Presence of Carbon Dioxide Under Extreme Environmental Pressure Conditions
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Topics: Carbon dioxide, Compressors, Pressure, Tribology, Testing, High pressure (Physics), Refrigerants, Refrigeration, Tribometers
Proceedings Papers

Tribological Investigation of Cast Iron Air-Conditioning Compressor Surfaces in CO 2 Refrigerant

Nicholaos G. Demas, Andreas A. Polycarpou
Proc. ASME. IJTC2006, Part A: Tribomaterials; Lubricants and Additives; Elastohydrodynamic Lubrication; Hydrodynamic Lubrication and Fluid Film Bearings; Rolling Element Bearings; Engine Tribology; Machine Components Tribology; Contact Mechanics, 17-23, October 23–25, 2006
Paper No: IJTC2006-12064
https://doi.org/10.1115/IJTC2006-12064
View Paper titled, Tribological Investigation of Cast Iron Air-Conditioning Compressor Surfaces in CO 2 Refrigerant
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Topics: Air conditioning, Carbon dioxide, Cast iron, Compressors, Refrigerants, Tribology, Oxygen, Testing, Wear, Augers