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.
Université Catholique de Louvain, Département des Sciences des Matériaux et des Procédés, PCIM, Louvain-la-Neuve, Belgium.
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P
Van Landuyt
J M
JM
Streydio
F
F
Delannay
E
E
Munting
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