{"?xml":{"@version":"1.0"},"edm:RDF":{"@xmlns:dc":"http://purl.org/dc/elements/1.1/","@xmlns:edm":"http://www.europeana.eu/schemas/edm/","@xmlns:wgs84_pos":"http://www.w3.org/2003/01/geo/wgs84_pos","@xmlns:foaf":"http://xmlns.com/foaf/0.1/","@xmlns:rdaGr2":"http://rdvocab.info/ElementsGr2","@xmlns:oai":"http://www.openarchives.org/OAI/2.0/","@xmlns:owl":"http://www.w3.org/2002/07/owl#","@xmlns:rdf":"http://www.w3.org/1999/02/22-rdf-syntax-ns#","@xmlns:ore":"http://www.openarchives.org/ore/terms/","@xmlns:skos":"http://www.w3.org/2004/02/skos/core#","@xmlns:dcterms":"http://purl.org/dc/terms/","edm:WebResource":[{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-4HRXMHCR/5f54b481-53c6-4b2f-8c05-2c20fd4c76ce/PDF","dcterms:extent":"1432 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-4HRXMHCR/3e30ac3c-7c96-41c9-b92d-fd24aaed4590/TEXT","dcterms:extent":"35 KB"}],"edm:TimeSpan":{"@rdf:about":"1999-2025","edm:begin":{"@xml:lang":"en","#text":"1999"},"edm:end":{"@xml:lang":"en","#text":"2025"}},"edm:ProvidedCHO":{"@rdf:about":"URN:NBN:SI:DOC-4HRXMHCR","dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/URN:NBN:SI:spr-6QOUKQ9A"},{"@xml:lang":"sl","#text":"Strojniški vestnik"}],"dcterms:issued":"2017","dc:creator":["Farhanah Azman, Nurul","Samion, Syahrullail"],"dc:format":[{"@xml:lang":"sl","#text":"številka:1"},{"@xml:lang":"sl","#text":"letnik:63"},{"@xml:lang":"sl","#text":"str. 15-24"}],"dc:identifier":["ISSN:0039-2480","COBISSID_HOST:15210267","URN:URN:NBN:SI:doc-4HRXMHCR"],"dc:language":"en","dc:publisher":{"@xml:lang":"sl","#text":"Zveza strojnih inženirjev in tehnikov Slovenije etc."},"dc:subject":[{"@xml:lang":"sl","#text":"koeficient trenja"},{"@xml:lang":"sl","#text":"površinska hrapavost"},{"@xml:lang":"sl","#text":"RBD palmov stearin"},{"@xml:lang":"sl","#text":"stopnja obrabe"},{"@xml:lang":"sl","#text":"tribometer v izvedbi konice na disku"}],"dcterms:temporal":{"@rdf:resource":"1999-2025"},"dc:title":{"@xml:lang":"sl","#text":"Improvement of the lubrication performance of rbd palm stearin as an alternative lubricant under different sliding speeds|"},"dc:description":[{"@xml:lang":"sl","#text":"Vegetable oils have gained global attention to be used as an alternative lubricant to reduce the dependency on natural resources of petroleum- based lubricants due to concern over environmental problems. In this study, a refined, bleached and deodorized (RBD) palm stearin was chosen as the base lubricant, and its lubrication performance was investigated using a pin-on-disk tribotester. A zinc dialkyl-dithiophosphate (ZDDP) additive in concentrations of 1 wt%, 3 wt% and 5 wt% was blended with RBD palm stearin to improve the lubrication performance of the base lubricant. Commercial semi-synthetic oil (SAE15W50) was used for comparison purposes. The experiments were conducted under various sliding speeds (1.5 ms -1 , 2.5 ms -1 and 3.5 ms -1 ) under normal force of 9.81 N for an hour. The lubrication performance of the tested lubricants was presented by the coefficient of friction, wear scar diameter, wear rate, surface roughness and wear worn surface of the pin specimen. The results show that an increase in ZDDP concentrations has improved the lubrication performance of the RBD palm stearin. RBD palm stearin with 5 wt% ZDDP additive shows a smaller coefficient of friction than that of SAE15W50, but creates a slightly larger wear scar diameter and wear rate"},{"@xml:lang":"sl","#text":"Rastlinska olja so pritegnila pozornost strokovnjakov po vsem svetu kot alternativno mazivo, ki bi lahko zmanjšalo odvisnost od naravnih virov pri mazivih na osnovi nafte in s tem pripomoglo k ohranitvi okolja. Maziva na osnovi nafte so namreč dokazano visokotoksična in niso biorazgradljiva. Rastlinska olja pa imajo kljub svojim ekološkim prednostim le omejeno oksidacijsko in toplotno stabilnost in za uveljavitev palmovega olja kot alternativnega maziva bi bilo treba najprej odpraviti njihove omejitve. Eden od možnih pristopov za zagotavljanje odlične mazalne sposobnosti je mešanje palmovega olja s pravo koncentracijo dodatka cink dialkil ditiofosfat (ZDDP). Če bi bila mazalna sposobnost palmovega olja konkurenčna naftnim oljem, bi lahko zaradi svojih okoljskih prednosti postalo prva izbira za uporabo pri mazivih"}],"edm:type":"TEXT","dc:type":[{"@xml:lang":"sl","#text":"znanstveno časopisje"},{"@xml:lang":"en","#text":"journals"},{"@rdf:resource":"http://www.wikidata.org/entity/Q361785"}]},"ore:Aggregation":{"@rdf:about":"http://www.dlib.si/?URN=URN:NBN:SI:DOC-4HRXMHCR","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:DOC-4HRXMHCR"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:DOC-4HRXMHCR/5f54b481-53c6-4b2f-8c05-2c20fd4c76ce/PDF"},"edm:rights":{"@rdf:resource":"http://rightsstatements.org/vocab/InC/1.0/"},"edm:provider":"Slovenian National E-content Aggregator","edm:intermediateProvider":{"@xml:lang":"en","#text":"National and University Library of Slovenia"},"edm:dataProvider":{"@xml:lang":"sl","#text":"Univerza v Ljubljani, Fakulteta za strojništvo"},"edm:object":{"@rdf:resource":"http://www.dlib.si/streamdb/URN:NBN:SI:DOC-4HRXMHCR/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:DOC-4HRXMHCR"}}}}