Abstract
Glass-ceramics containing a large amount of calcium pyrophosphate (β-Ca2P2O7) crystal were prepared via crystallization and sintering; compacts of a calcium phosphate glass powders with a composition of 60CaO · 30P2O5 · 5TiO2 · 5Na2O (in mol%) were heated for 3-6 h at 850 °C in air. The compacts were densified by the viscous flow of the glassy phases during heating. The calcium phosphate glass-ceramics were found to show a bending strength of approximately 100 MPa, and they were easy to machine, as confirmed by a drilling test using a conventional carbide tool. The machinability is thought to arise from the microstructure consisting predominantly of the interlocking and platelike β-Ca2P2O7 precipitated in the glass.
Original language | English |
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Pages (from-to) | 876-880 |
Number of pages | 5 |
Journal | Journal of Materials Research |
Volume | 16 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2001 Mar |
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering