Abstract
Novel silica-free calcium phosphate glass-ceramics was prepared by heating a compact of 60CaO · 30P2O5 · 3TiO2 · 7Na2O glass powders. When powder-compacts of the glasses were heated at 850°C, they crystallized and subsequently sintered, resulting in glass-ceramics containing β-Ca3(PO4)2 and β-Ca2P2O7 crystalline phases. The glass-ceramics show relatively high mechanical strength of 100 - 120 MPa in bending and fracture toughness of KIC ≈ 1.9 MPa·m0.5. Hydroxyapatite was formed newly on the surface of the glass-ceramic in simulated body fluid at 37°C. By heating a new type of titanium alloy (Ti-29Nb-13Ta-4.6Zr), on which the glass powders were placed, at 800°C in air, a glass-ceramic layer containing β-Ca3(PO4)2 crystal was found to be joined easily with the metal. The joining between the coating layer and the metal substrate is very strong in tensile bonding strength.
| Original language | English |
|---|---|
| Pages (from-to) | 223-226 |
| Number of pages | 4 |
| Journal | Key Engineering Materials |
| Volume | 192-195 |
| Publication status | Published - 2001 Jan 1 |
| Event | 13th international Symposium on Ceramics in Medicine (BIOCERAMICS) - Bologna, Italy Duration: 2000 Nov 22 → 2000 Nov 26 |
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering