title: [Interface between Ni-Cr alloy and ceramic studied by scanning electron microscopy].
abstract: In this investigation we observed the interface between Wiron 99 (Bego) dental Ni-Cr alloy and Vision (Wohlwend AG) ceramic opaquer with SEM. In the system there are intermediate phases coming from a solid phase rection which play an essential role in the metal-ceramic bond. The analytical methods showed that in this phases the content of Ni and Cr charge not monotonously from alloy to ceramic which shows strong chemical effects (the selective affinity of Cr and Ni). The concentration of Cr after the alloy surface increases in a 1-1.5 microns layer, where its concentration is higher than at the alloy, while the concentration of Ni decrease in this layer. Than at the ceramic side of the reaction zone the concentration of Ni increases in a 1-1.5 microns wide layer where its concentration is near upon that one in the alloy.
authors.affiliation: Debreceni Orvostudományi Egyetem, Stomatológiai Klinika.
authors.forename: C
authors.initials: C
authors.lastname: Hegedüs
authors.forename: V
authors.initials: V
authors.lastname: Kökényesi
authors.forename: A
authors.initials: A
authors.lastname: Imre
authors.forename: D
authors.initials: D
authors.lastname: Beke
mesh_terms: D002516:Ceramics / Q000032:analysis*; D002857:Chromium / Q000032:analysis*; D003764:Dental Materials / Q000032:analysis*; D006801:Humans; D008855:Microscopy, Electron, Scanning; D009532:Nickel / Q000032:analysis*
chemical_list: D003764:Dental Materials; D002857:Chromium; D009532:Nickel