SiO2-free calcium phosphate glass-ceramics with easy machinability were prepared by heat-treatment of a 60CaO-30P2O5-3TiO2-7Na2O (in mol%) glass. The glass-ceramics containing β-Ca2P2O7 and β-Ca3(PO4)2 crystals were found to show good machinability, as confirmed by a drilling test using a conventional carbide tool. SEM observation of the glass-ceramic showed that β-Ca2P2O7 crystals having a layered morphology are interlocking one another; plate-like crystals of several tens nanometers in thickness are piled up. The easy machinability of the glass-ceramics was suggested to result from the cleavage of β-Ca2P2O7 crystals precipitated in the glass. The glass-ceramics formed bonelike apatite crystals on the surface in simulated body fluid. The glass-ceramics were also found to be strongly joined with a new β-type titanium alloy, Ti-29Nb-13Ta-4.6Zr, by heating in air.
|ジャーナル||Materials Science Forum|
|出版ステータス||Published - 2003|
|イベント||Thermec 2003 Processing and Manufacturing of Advanced Materials - Madrid, Spain|
継続期間: 2003 7 7 → 2003 7 11
ASJC Scopus subject areas