title: Cross-sectional TEM analysis of porcelain fused to gold-coated titanium.
abstract: This study investigated the interfacial microstructure between gold-coated titanium and low-fusing porcelain. The square surfaces of cast titanium split rods were sputter-coated with gold using a sputter coater at 40 mA for 1,000 seconds. Specimens were prepared for transmission electron microscopy (TEM) by cutting and polishing two pieces of the gold-coated split-rod specimens, which were glued and embedded in Cu tubes with an epoxy adhesive. TEM observation was also conducted for the gold-coated specimens after degassing and porcelain fusing. Due to the gold coating, intermetallic compounds of Au-Ti formed under the sputtered gold layer after degassing and porcelain fusing. Ti3Au and Ti3Al layers were also observed beneath the Au-Ti intermetallic compound layer. There was good adhesion of porcelain to the Au-Ti compound and Ti oxides without any gaps or formation of a Ti-deficient intermediate layer, which is normally observed at the titanium-porcelain interface. The results of this TEM study suggested that gold-sputter-coating the cast titanium surface produced a Ti-Au intermetallic compound and suppressed the formation of a Ti-deficient intermediate layer, resulting in improved adherence between porcelain and titanium.
authors.affiliation: Department of Advanced Materials Science, Faculty of Engineering, Kagawa University, 2217-20 Hayashi, Takamatsu, 761-0396, Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Tanaka
authors.forename: Ikuya
authors.initials: I
authors.lastname: Watanabe
authors.forename: Toru
authors.initials: T
authors.lastname: Okabe
mesh_terms: D020099:Coated Materials, Biocompatible; D003722:Dental Alloys / Q000737:chemistry*; D003799:Dental Stress Analysis; D004577:Electron Probe Microanalysis; D006047:Gold Alloys / Q000737:chemistry*; D016876:Metal Ceramic Alloys / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D013499:Surface Properties
chemical_list: D020099:Coated Materials, Biocompatible; D003722:Dental Alloys; D006047:Gold Alloys; D016876:Metal Ceramic Alloys; C416206:gold-titanium alloy