Be, Li, and Na redistribution near a porcelain/Ni alloy interface shown by ion microprobe mass analysis.
During porcelainization the non-preoxidized alloy develops a Be-rich reaction zone in the interface which separates a Be-depleted alloy from a Li and (to a lesser extent Na) depleted region of the ceramic. Thus, Be diffuses to the interface through the alloy Be degrees leads to Be++ + 2 e- occurs at the interface; some of the electrons are electronically conducted to the porcelain-air interface where they are consumed as 2 e- + 1/2 O degrees 2 leads to O=, and the resulting negatively charged porcelain surface attracts Li+ (and Na+).
D001608:Beryllium / Q000032:analysis*; D003722:Dental Alloys / Q000032:analysis; D001840:Dental Bonding; D003776:Dental Porcelain / Q000032:analysis; D004577:Electron Probe Microanalysis; D008094:Lithium / Q000032:analysis*; D013058:Mass Spectrometry / Q000379:methods; D009532:Nickel; D010087:Oxides / Q000032:analysis; D012964:Sodium / Q000032:analysis*; D013499:Surface Properties
D003722:Dental Alloys; D010087:Oxides; D003776:Dental Porcelain; D009532:Nickel; D008094:Lithium; D012964:Sodium; D001608:Beryllium