{"?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-W69GWVGB/00d9804f-130d-4a1e-b5b9-7f4e75282667/PDF","dcterms:extent":"168 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-W69GWVGB/80195c18-2c97-4cb2-bfde-3e41b2f75a06/TEXT","dcterms:extent":"22 KB"}],"edm:TimeSpan":{"@rdf:about":"2000-2024","edm:begin":{"@xml:lang":"en","#text":"2000"},"edm:end":{"@xml:lang":"en","#text":"2024"}},"edm:ProvidedCHO":{"@rdf:about":"URN:NBN:SI:DOC-W69GWVGB","dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/urn:nbn:si:spr-ihg6vo21"},{"@xml:lang":"sl","#text":"Materiali in tehnologije"}],"dcterms:issued":"2014","dc:creator":["Allaoui, Omar","Bouarour, Boudjema","Keddam, Mourad"],"dc:format":[{"@xml:lang":"sl","#text":"številka:4"},{"@xml:lang":"sl","#text":"letnik:48"},{"@xml:lang":"sl","#text":"str. 515-520"}],"dc:identifier":["COBISSID:1073322","ISSN:1580-2949","URN:URN:NBN:SI:doc-W69GWVGB"],"dc:language":"en","dc:publisher":{"@xml:lang":"sl","#text":"Inštitut za kovinske materiale in tehnologije"},"dc:subject":[{"@xml:lang":"en","#text":"boriding"},{"@xml:lang":"sl","#text":"boriranje"},{"@xml:lang":"en","#text":"chemical stresses"},{"@xml:lang":"sl","#text":"čas inkubacije"},{"@xml:lang":"en","#text":"diffusion"},{"@xml:lang":"sl","#text":"difuzija"},{"@xml:lang":"sl","#text":"Fickov zakon"},{"@xml:lang":"en","#text":"Fick's law"},{"@xml:lang":"en","#text":"incubation time"},{"@xml:lang":"sl","#text":"kemijske napetosti"},{"@xml:lang":"en","#text":"kinetics"},{"@xml:lang":"sl","#text":"kinetika"},{"@rdf:resource":"http://www.wikidata.org/entity/Q856634"}],"dcterms:temporal":{"@rdf:resource":"2000-2024"},"dc:title":{"@xml:lang":"sl","#text":"Estimation of the effective boron-diffusion coefficient in the Fe2B layers grown on gray cast iron| Določanje efektivnega koeficienta difuzije bora pri rasti plasti Fe2B na sivem litem železu|"},"dc:description":[{"@xml:lang":"sl","#text":"The present work evaluates the effective diffusion coefficient of boron in the Fe2B layers grown on a substrate from gray cast iron. The boride layers were generated using powder-pack boriding in the temperature range of 1173-1273 K for (2, 4, 6 and 8) h of treatment. First, the diffusion coefficient of boron in Fe2B (free of chemical stresses) was obtained through solving the mass-balance equation at the (Fe2B/substrate) interface using the experimental values of parabolic-growth constants taken from the literature. Second, a simple equation was derived to evaluate the effective diffusion coefficient of boron in Fe2B by considering the effect of chemical stresses. The estimated values of boron activation energies were 154.8 kJ/mol and 164.8 kJ/mol with and without the presence of chemical stresses. Furthermore, the calculated values of effective diffusion coefficients were found to be sensitive to the change in the boriding temperature and to the increase in the upper boron concentration in Fe2B"},{"@xml:lang":"sl","#text":"To delo ocenjuje efektivni koeficient difuzije bora v plasteh Fe2B, zraslih na podlagi iz sivega litega železa. Boridne plasti so nastale med boriranjem v prahu v škatli, v temperaturnem območju 1173-1273 K in trajanju (2, 4, 6 in 8) h. Najprej je bil določen koeficient difuzije bora v Fe2B (brez kemijskih napetosti) z rešitvijo enačbe za masno ravnotežje (Fe2B/podlaga) na stiku z uporabo eksperimentalnih vrednosti za konstanto parabolične rasti, dobljeno v literaturi. Nato je bila izpeljana enostavna enačba za oceno efektivnega koeficienta difuzije bora v Fe2B z upoštevanjem kemijskih napetosti. Določeni sta bili vrednosti aktivacijske energije bora 154,8 kJ/mol in 164,8 kJ/mol s kemijskimi napetostmi in brez njih. Ugotovljeno je bilo tudi, da so izračunane vrednosti efektivnega koeficienta difuzije občutljive za spremembo temperature boriranja in za naraščanje koncentracije bora v Fe2B"}],"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-W69GWVGB","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:DOC-W69GWVGB"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:DOC-W69GWVGB/00d9804f-130d-4a1e-b5b9-7f4e75282667/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":"Inštitut za kovinske materiale in tehnologije"},"edm:object":{"@rdf:resource":"http://www.dlib.si/streamdb/URN:NBN:SI:DOC-W69GWVGB/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:DOC-W69GWVGB"}}}}