Machinable calcium pyrophosphate glass-ceramics

Toshihiro Kasuga, Miwako Terada, Masayuki Nogami, Mitsuo Niinomi

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


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 languageEnglish
Pages (from-to)876-880
Number of pages5
JournalJournal of Materials Research
Issue number3
Publication statusPublished - 2001 Mar

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


Dive into the research topics of 'Machinable calcium pyrophosphate glass-ceramics'. Together they form a unique fingerprint.

Cite this