Synthesis of bioactive coatings on Ti substrates using glass enamel.
Bioactive coatings on titanium can be prepared by dispersing hydroxyapatite particles into a borosilicate glass enamel doped with TiO2. Adhesion of the coating is obtained when the titanium substrate has been preoxidized before enameling in such a way as to form a continuous TiO2-layer. Adhesion results from the diffusion of this TiO2-layer into the liquid glass during enameling. The evolution of the diffusion zone was followed by scanning electron microscopy and electron probe microanalysis. Adhesion disappears after a critical time of firing which corresponds to the completion of the dissolution of the TiO2-layer by the glass. The borosilicate glass wets the hydroxyapatite particles and adheres strongly to them after cooling.
Van Landuyt
P
P
Université Catholique de Louvain, Département des Sciences des Matériaux et des Procédés, PCIM, Louvain-la-Neuve, Belgium.
Streydio
J M
JM
Delannay
F
F
Munting
E
E
D018786:Bone Substitutes; D017886:Durapatite / Q000592:standards*; D004577:Electron Probe Microanalysis; D005898:Glass / Q000592:standards*; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D017640:Silicates; D013997:Time Factors; D000267:Tissue Adhesions; D014025:Titanium / Q000592:standards*; D014906:Wetting Agents