ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In this study, CrZrN film was deposited on AISI 4130 cylinder barrel and valve plate usinga unbalanced magnetron sputtering. The tribological properties between a coated steel cylinder barreland coated steel valve plate were evaluated by a custom-built disk-to-disk tribometer and the resultswere compared with those between a coated steel cylinder barrel and a conventional bronze valveplate. The lowest friction coefficients were observed between a coated steel cylinder barrel and coatedsteel valve plate and they were approximately one half of those between a coated steel cylinder barreland conventional bronze valve plate in the range of testing up to 1600rpm. Coated valve plate andbronze valve plate showed a steady state of friction coefficient at approximately 0.03 and 0.06,respectively after about 1000 rpm, but steel valve plate without coating showed a continuousdecrease in friction coefficient, which suggested that active wear is continuously occurring. Byapplying CrZrN coating on the commercial cylinder barrel and steel valve plate, much improvedtribological results could be obtained, by a factor of approximately 2 in terms of friction coefficientthan those from bronze valve plate. Under a tap water environment CrZrN coating appeared toperform better than CrSiN coating. Although further work to reduce the friction coefficient below0.13 in the steady state after initial drop is still needed, possibilities of applying CrZrN coating torealize a water hydraulic pump were demonstrated through the present work
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.544-545.657.pdf
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