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dc.contributor.authorÖztürk, Orhan
dc.contributor.authorOkur, Salih
dc.contributor.authorPichon, L.
dc.contributor.authorLiedke, M. O.
dc.contributor.authorRiviere, Jean Paul
dc.date.accessioned2017-03-08T07:55:20Z
dc.date.available2017-03-08T07:55:20Z
dc.date.issued2011-07
dc.identifier.citationÖztürk, O., Okur, S., Pichon, L., Liedke, M.O., and Riviere, J.P. (2011). Magnetic layer formation on plasma nitrided CoCrMo alloy. Surface and Coatings Technology, 205(SUPPL. 2), S280-S285. doi:10.1016/j.surfcoat.2011.01.047en_US
dc.identifier.issn0257-8972
dc.identifier.urihttp://doi.org/10.1016/j.surfcoat.2011.01.047
dc.identifier.urihttp://hdl.handle.net/11147/5004
dc.description.abstractIn this study structural and magnetic character of the expanded austenite phase (γN) layer formed on a medical grade CoCrMo alloy by a low-pressure Radio-Frequency plasma nitriding process was investigated. The formation of the expanded austenite phase is facilitated at a substrate temperature near 400°C for 1, 2, 4, 6 and 20h under a gas mixture of 60% N2-40% H2. The magnetic state of the γN layers was determined by a surface sensitive technique, magneto-optic Kerr effect (MOKE), and with a scanning probe microscope in magnetic force mode (MFM). Strong evidence for the ferromagnetic nature of the γN-(Co,Cr,Mo) phase is provided by the observation of stripe domain structures and the hysteresis loops. The ferromagnetic state for the γN phase observed here is mainly linked to large lattice expansions (~10%) due to high N contents (~30at.%). As an interstitial impurity, nitrogen dilates the host lattice i.e. the Co-Co (or Fe-Fe) distance is increased, which strongly influences the magnetic interactions. An analogy between the magnetic properties of the expanded phases, γN-(Fe,Cr,Ni) and γN-(Co,Cr,Mo), formed in austenitic stainless steel alloys and the CoCrMo alloy of this study is made, and it is suggested that the ferromagnetic states for the γN-(Co,Cr,Mo) and γN-(Fe,Cr,Ni) phases may be correlated with the volume dependence of the magnetic properties of fcc-Co/Co4N and fcc-Fe/Fe4N, respectively.en_US
dc.description.sponsorshipTurkish National Science Foundation grant 107M218en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.isversionof10.1016/j.surfcoat.2011.01.047en_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectCoCrMo alloyen_US
dc.subjectExpanded austenite structureen_US
dc.subjectFerromagnetismen_US
dc.subjectPlasma nitridingen_US
dc.subjectMagnetoplasmaen_US
dc.titleMagnetic layer formation on plasma nitrided CoCrMo alloyen_US
dc.typearticleen_US
dc.contributor.authorIDTR4824en_US
dc.contributor.iztechauthorÖztürk, Orhan
dc.contributor.iztechauthorOkur, Salih
dc.relation.journalSurface and Coatings Technologyen_US
dc.contributor.departmentİYTE, Fen Fakültesi, Fizik Bölümüen_US
dc.identifier.volume205en_US
dc.identifier.issueSUPPL. 2en_US
dc.identifier.startpageS280en_US
dc.identifier.endpageS285en_US
dc.identifier.wosWOS:000293258600060
dc.identifier.scopusSCOPUS:2-s2.0-79959791926
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US


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