Cold Crucible Levitation Melting of Biomedical Ti-30 wt%Ta Alloy

Hisao Fukui, Wei Yang, Shirou Yamada, Yoshimasa Fujishiro, Arimichi Morita, Mitsuo Niinomi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Recently, titanium-tantalum alloys have been studied as implant materials for dental and orthopedic surgery. However, titanium and tantalum are difficult to mix by common arc melting and induction melting, because of their high melting point and the marked difference between their densities (Ti: 1,680°C, 4.5 g/cm3, Ta: 2,990°C, 16.6 g/cm3). Thus, the Cold Crucible Levitation Melting (CCLM) method was chosen to produce a Ti-30 wt%Ta binary alloy in the present study. The CCLM furnace, with 1 kg capacity, consisted of a water-cooled crucible comprising oxygen-free high purity copper segments and coils wrapped around the crucible and connected to a frequency inverter power supply. A qualified ingot of 1.0 kg of Ti-30 wt%Ta alloy was obtained. The ingot was characterized from the surface quality, chemical composition distribution and microstructure, and finally the melting process was discussed.

Original languageEnglish
Pages (from-to)156-163
Number of pages8
JournalDental materials journal
Issue number2
Publication statusPublished - 2001 Jun


  • Biomedical Ti alloys
  • Cold crucible levitation melting
  • Ti-Ta alloys

ASJC Scopus subject areas

  • Ceramics and Composites
  • Dentistry(all)


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