title: Ceramic bonding strength of Au-1.6 wt% Ti alloy.
abstract: The aim of this investigation was to evaluate the metal-ceramic bonding of Au-1.6 wt% Ti alloy. Therefore, the coefficient of thermal expansion, modulus of elasticity, ceramic bonding strength, and hardness of Au-1.6 wt% Ti alloy were measured. The metal-ceramic interface was observed by EPMA to investigate its bonding mechanism. The Au-1.6 wt% Ti alloy showed a coefficient of thermal expansion close to that of conventional precious metal alloys for metal-ceramics. Bonding strength was 25 MPa or higher for all specimens--whether ceramic-fired directly after casting, or following oxidation treatment or age hardening. Specimens subjected to oxidation treatment showed slightly lower post-firing hardness than those age-hardened. EPMA observation showed an accumulation of Ti and O contents on the alloy side at the metal-ceramic interface.
authors: Division of Fixed Prosthodontics, Graduate School of Dentistry, Tohoku University, 4-1 Seiryou-cho, Aoba-ku, Sendai 980-8575, Japan. masa-it@mail.tains.tohoku.ac.jp
authors: Masayuki
authors: M
authors: Ito
authors: Masafumi
authors: M
authors: Kikuchi
authors: Osamu
authors: O
authors: Okuno
authors: Kohei
authors: K
authors: Kimura
mesh_terms: D000704:Analysis of Variance; D003722:Dental Alloys; D001840:Dental Bonding; D003735:Dental Casting Technique; D003799:Dental Stress Analysis; D004055:Differential Thermal Analysis; D004548:Elasticity; D004577:Electron Probe Microanalysis; D006046:Gold / Q000032:analysis; D006047:Gold Alloys; D006244:Hardness; D008422:Materials Testing; D016876:Metal Ceramic Alloys; D044367:Phase Transition; D013997:Time Factors; D014025:Titanium / Q000032:analysis
chemical_list: D003722:Dental Alloys; D006047:Gold Alloys; D016876:Metal Ceramic Alloys; C416206:gold-titanium alloy; C009495:titanium dioxide; D006046:Gold; D014025:Titanium