Alloying titanium and tantalum by cold crucible levitation melting (CCLM) furnace

Arimichi Morita, Hisao Fukui, Hideaki Tadano, Shizuo Hayashi, Jiro Hasegawa, Mitsuo Niinomi

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

Recently, titanium alloys have been studied as implant materials for dental and orthopedic surgery. Titanium alloys have distinguished characteristics of biocompatibility, corrosion resistance and mechanical properties. Having non-poisonous character to a living body, Ta, Zr and Nb have been used for addition to titanium alloys, which are free of vanadium and aluminum. It is well-known that titanium and tantalum are difficult metals to alloy in usual furnaces as these are very reactive metals, having great differences in melting point and specific gravity. To produce an alloy of titanium and tantalum, cold crucible levitation melting (CCLM) is effective in obtaining a uniform composition. Notable features of CCLM are that it can (1) melt metals with a high melting point, (2) create an alloy of uniform composition with a strong stirring effect by an electromagnetic force and (3) allow metals to be melted without contamination. We have melted 850 g of titanium and 150 g of tantalum by a CCLM furnace and have successfully made 1.0 kg of uniform composite Ti-15wt.% Ta alloy. It is noteworthy that the alloy was produced from pure base metals which were not alloyed beforehand and was made by a single melting (no re-melting) process.

Original languageEnglish
Pages (from-to)208-213
Number of pages6
JournalMaterials Science and Engineering A
Volume280
Issue number1
DOIs
Publication statusPublished - 2000 Mar 15

Keywords

  • Alloying titanium and tantalum
  • Biomedical titanium alloys
  • CCLM
  • Cold crucible levitation melting
  • Making an alloy of base metals
  • Single melting (no re-melting) process

ASJC Scopus subject areas

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

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