Preparation of calcium phosphate glass-ceramics and their coating on titanium alloys

Toshihiro Kasuga, Masayuki Nogami, Mitsuo Niinomi

Research output: Contribution to journalConference articlepeer-review

7 Citations (Scopus)

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 languageEnglish
Pages (from-to)223-226
Number of pages4
JournalKey Engineering Materials
Volume192-195
Publication statusPublished - 2001 Jan 1
Event13th international Symposium on Ceramics in Medicine (BIOCERAMICS) - Bologna, Italy
Duration: 2000 Nov 222000 Nov 26

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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