Results 21 to 30 of about 375,121 (181)

Abrasion Resistance of Restorative Coatings for Crankshafts and Bearings in Agricultural Machinery

Acta Technologica Agriculturae, 2022
The paper presented examines the dynamics of wear of restored parts using different materials for the friction pair. The pair of crankshaft and sliding bearing largely determines the machine service life – although their overall wear index is less than 1%
Kangalov Plamen, Nikolov Mitko, Todorov Iliya   +2 more
doaj   +1 more source

Effect of Temperature on the Tribological Properties of Hafnium Carbonitrides Coatings

Metals, 2023
For industrial processes in which refractory metals are necessary, hafnium carbonitride exhibits excellent performance due to its high thermal conductivity and resistance to oxidation.
Willian Aperador, Jorge Bautista-Ruiz, Jorge Sánchez-Molina   +2 more
doaj   +1 more source

Characterization of the Micro-Abrasive Wear in Coatings of TaC-HfC/Au for Biomedical Implants [PDF]

Materials, 2017
The object of this work was the deposition of a Ta-Hf-C thin film with a gold interlayer on stainless steel, via the physical vapor deposition (PVD) technique, in order to evaluate the properties of different systems subjected to micro-abrasive wear phenomena generated by alumina particles in Ringer's solution.
Pablo Guzmán, Luis Yate, Mercy Sandoval, Jose Caballero, Willian Aperador   +4 more
openaire   +3 more sources

Accelerating growth of HFC-227ea (1,1,1,2,3,3,3-heptafluoropropane) in the atmosphere [PDF]

, 2010
We report the first measurements of 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea), a substitute for ozone depleting compounds, in air samples originating from remote regions of the atmosphere and present evidence for its accelerating growth.
Bolder, Michel, T. J. Schuck, T. Röckmann, J. C. Laube, Marine and Atmospheric Research, Schwander, Jakob, C. A. M. Brenninkmeijer, Bönisch, H., D. E. Oram, Reeves, C.E., Reeves, Claire E., Röckmann, Thomas, Schuck, T.J., Mills, G. P., Oram, D. E., Brenninkmeijer, Carl, W. T. Sturges, Sturges, William T., Engel, Andreas, J. Schwander, Schwander, J., H. Bönisch, A. Engel, Sub Atmospheric physics and chemistry, M. J. Newland, Brenninkmeijer, C.A.M., Martinerie, P., Bolder, M., Sturges, W.T., Oram, David, Schuck, Tanja J., Röckmann, T., Laube, Johannes Christian, M. Bolder, Engel, A., Blunier, Thomas, Veen, Cornelis J. van der, Bönisch, Harald, Sturges, W. T., P. Martinerie, Mills, Graham, Blunier, T., G. P. Mills, E. Witrant, Newland, M. J., Newland, Mike J., Oram, D.E., Newland, M.J., Laube, J. C., Reeves, C. E., Laube, J.C., van der Veen, C., Brenninkmeijer, C. A. M., Schuck, T. J., Martinerie, Patricia, Sub Algemeen Marine & Atmospheric Res, C. van der Veen, C. E. Reeves, T. Blunier, Mills, G.P., Witrant, E., Witrant, Emmanuel, Brenninkmeijer, C.-A.-M.   +62 more
core   +3 more sources

Nano-crystalline ultra high temperature HfB2 and HfC powders and coatings using a sol-gel approach

, 2011
Nano-crystalline HfB2 and HfC powders have been synthesized through a simple sol-gel route by using inorganic precursors like hafnium (IV) chloride (HfCl4), boric acid (H3BO3) and phenolic resin as a source of hafnium, boron and carbon respectively.
J.G.P. Binner (7121612), A. Heaton (7126067), Saranya Venugopal (7124624), Bala Vaidhyanathan (7121615), Peter M. Brown (7125803), Anish Paul (7124552)   +5 more
core   +7 more sources

Heat Transfer Enhancement of Falling Film Evaporation on a Horizontal Tube by Thermal Spray Coating

Applied Sciences, 2020
Falling film evaporators are gaining popularity as substitutes to typical flooded evaporators because of their low refrigerant charge. It is important to form and keep a thin liquid film on the heat transfer surface to ensure their high heat transfer ...
Tsutomu Ubara, Hitoshi Asano, Katsumi Sugimoto   +2 more
doaj   +1 more source

In situ Tribo-Fluorination for Oil-Less Hermetic Compressor Applications

Frontiers in Mechanical Engineering, 2021
In the present work, we overview the multidisciplinary development of a regular, lubricated, hermetic compressor which works in an on-off cycle, circular motion, single-speed, many tribological contacts, into an innovative, linear motion, variable ...
Gabriel Borges, Diego Salvaro, Roberto Binder, Cristiano Binder, Aloisio N. Klein, Jose D. B. de Mello, Jose D. B. de Mello, Jose D. B. de Mello   +7 more
doaj   +1 more source

Research of structure and properties of boride hardening coatings [PDF]

MATEC Web of Conferences, 2019
High strength aluminum alloys are particularly suitable as lightweight materials in vehicle and aircraft engineering. The wear resistance of materials can be improved by surface and coating technology.
Malikov Vladimir, Ishkov Alexey, Sagalakov Anatoly, Dmitriev Sergey   +3 more
doaj   +1 more source

Heat Transfer Enhancement of Falling Film Evaporation of HFO-1233zd(E) and HFC-134a on a Horizontal Tube by Thermal Spray Coating [PDF]

, 2021
A falling film evaporator can reduce the amount of refrigerant compared with a flooded evaporator. Required functions for the heat transfer surface in falling liquid film evaporation are thin liquid film formation without breaking at low heat flux ...
Asano, Hitoshi, Ubara, Tsutomu, Sugimoto, Katsumi   +2 more
core   +1 more source

A Reduced GWP Replacement for HFC-134a in Centrifugal Chillers: XP10 Measured Performance and Projected Climate Impact [PDF]

, 2012
The performance of XP10, a new refrigerant with a reduced GWP, in a centrifugal chiller designed for HFC-134a with a cooling capacity of 1969.44 kW (560 tons) was measured under full and part load conditions and compared to performance with HFC-134a ...
Kulankara, Satheesh, Kauffman, Justin P., Kontomaris, Konstantinos   +2 more
core   +1 more source