Mechanical properties and grindability of dental cast Ti-Nb alloys

Masafumi Kikuchi, Masatoshi Takahashi, Osamu Okuno

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)


Aiming at developing a dental titanium alloy with better mechanical properties and machinability than unalloyed titanium, a series of Ti-Nb alloys with Nb concentrations up to 30% was made. They were cast into magnesia-based molds using a dental casting machine and the mechanical properties and grindability of the castings were examined. The hardness of the alloys with Nb concentrations of 5% and above was significantly higher than that of titanium. The yield strength and tensile strength of the alloys with Nb concentrations of 10% and above were significantly higher than those of titanium, while the elongation was significantly lower. A small addition of niobium to titanium did not contribute to improving the grindability of titanium. The Ti-30%Nb alloy exhibited significantly better grindability at low grinding speed with higher hardness, strength, and Young's modulus than titanium, presumably due to precipitation of the w phase in the β matrix.

Original languageEnglish
Pages (from-to)328-342
Number of pages15
JournalDental Materials Journal
Issue number3
Publication statusPublished - 2003 Sept


  • Grindability
  • Mechanical property
  • Titanium alloy


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