{"?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-N8DGUJNB/ce4e520f-48c1-4bd8-b1a7-6835c1cccba4/PDF","dcterms:extent":"620 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-N8DGUJNB/d130b836-93b8-4db6-a49f-dcc4da72426d/TEXT","dcterms:extent":"17 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-N8DGUJNB","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":["Drápala, Jaromír","Kirillova, Valentina M.","Skotnicová, Kateřina","Szurman, Ivo","Zaporozhets, Oleg I."],"dc:format":[{"@xml:lang":"sl","#text":"letnik:48"},{"@xml:lang":"sl","#text":"številka:6"},{"@xml:lang":"sl","#text":"str. 823-826"}],"dc:identifier":["COBISSID:1112746","ISSN:1580-2949","URN:URN:NBN:SI:doc-N8DGUJNB"],"dc:language":"en","dc:publisher":{"@xml:lang":"sl","#text":"Inštitut za kovinske materiale in tehnologije"},"dc:subject":[{"@xml:lang":"sl","#text":"fizikalne lastnosti"},{"@xml:lang":"sl","#text":"monokristal"},{"@xml:lang":"en","#text":"physical properties"},{"@xml:lang":"en","#text":"single crystal"},{"@xml:lang":"en","#text":"tungsten"},{"@xml:lang":"en","#text":"ultrasonic method"},{"@xml:lang":"sl","#text":"ultrazvočna metoda"},{"@xml:lang":"sl","#text":"volfram"},{"@rdf:resource":"http://www.wikidata.org/entity/Q754943"}],"dcterms:temporal":{"@rdf:resource":"2000-2024"},"dc:title":{"@xml:lang":"sl","#text":"Investigation of physical properties of tungsten-based single crystals using an ultrasonic method| Preiskava fizikalnih lastnosti monokristalov na osnovi volframa z metodo ultrazvoka|"},"dc:description":[{"@xml:lang":"sl","#text":"Using an ultrasonic method, the measurement of longitudinal and transversal velocities v of ultrasonic waves in the major crystallographic directions of pure-tungsten single crystals and tungsten single crystals alloyed with Ta and Mo was performed. Single crystals with a  110  crystallographic orientation were prepared by plasma-arc melting. Crystal density r was also measured. Crystal elastic constants C ij , anisotropy factors A , Young's modulus E , shear modulus G and bulk modulus B for the given crystallographic directions, and the mean values of the longitudinal and transversal velocities of the ultrasound according to the Fochtu-Roisu-Chilly method, Young's modulus, shear modulus, Poisson's ratio and Debye temperature were calculated from the obtained data. The measurement of ultrasound rates was realized by means of a pulse apparatus with a frequency of 10 MHz to 30 MHz. It was found that the alloying of pure tungsten with the elements such as tantalum and molybdenum led to a decrease in the average magnitudes of v, C ij, and B over various crystallographic and polarization directions, as well as the magnitude of r. The effects of the alloying elements on the elastic properties of tungsten crystals were identical. It may be concluded on the basis of the obtained results that the ultrasonic method can be used for the quality control of the purity of tungsten single crystals and tungsten low-alloyed alloys by measuring the attenuation effects of ultrasound waves in various parts of the tested samples"},{"@xml:lang":"sl","#text":"Z ultrazvočno metodo je bila izvršena meritev longitudinalne in transverzalne hitrosti nu ultrazvočnih valov v glavnih kristalografskih smereh kristalov čistega volframa in volframovega monokristala, legiranega s Ta in Mo. Monokristali s kristalografsko orientacijo 110  so bili izdelani s taljenjem v plazemskem obloku. Izmerjena je bila gostota rho kristala. Iz dobljenih podatkov so bili izračunani: elastična konstanta C ij kristala, faktor anizotropije A , Youngov modul E , strižni modul G in elastični modul pri stiskanju B pri dani kristalografski smeri in glavne vrednosti longitudinalnih in transverzalnih hitrosti ultrazvoka po Fochtu-Roisu-Chillyjevi metodi, Youngov modul, strižni modul, Poissonovo razmerje in Debyejeva temperatura. Meritev hitrosti ultrazvoka je bila izvršena s pulzatorjem s frekvenco od 10 MHz do 30 MHz. Ugotovljeno je, da legiranje čistega volframa z elementi, kot sta tantal in molibden, povzroči zmanjšanje povprečnih veličin v, C ij in B v številnih kristalografskih in polarizacijskih smereh, kot tudi veličino rho. Vpliv legirnih elementov na elastične lastnosti kristalov volframa je bil enak. Na podlagi dobljenih rezultatov se lahko sklene, da se ultrazvočna metoda lahko uporabi za kontrolo kvalitete monokristalov volframa in njegovih malo legiranih zlitin z meritvijo oslabitve ultrazvočnih valov v različnih delih preizkušanih vzorcev"}],"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-N8DGUJNB","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:DOC-N8DGUJNB"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:DOC-N8DGUJNB/ce4e520f-48c1-4bd8-b1a7-6835c1cccba4/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-N8DGUJNB/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:DOC-N8DGUJNB"}}}}