Refining effect of hydrogen plasma arc melting on titanium sponges

K. Mimura, J. W. Lim, J. M. Oh, G. S. Choi, S. W. Cho, M. Uchikoshi, M. Isshiki

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


Hydrogen plasma arc melting (HPAM) of commercial Ti sponges (> 99.7%) was examined. Ti sponges had main impurities such as Fe, Al, Cl and Mn. These main impurities could be reduced more efficiently by HPAM than by Ar PAM. Other small amount of impurities also had a tendency of reduction by HPAM. In addition, it was found that each removal degree is attributable to a differential refining effect caused by the difference of initial impurity concentration. For the unique refining effect of HPAM, dissociated and activated hydrogen atoms involved in the high temperature plasma arc are considered to play an important role in the melting process.

Original languageEnglish
Pages (from-to)411-414
Number of pages4
JournalMaterials Letters
Issue number3
Publication statusPublished - 2010 Feb 15


  • Glow discharge mass spectrometry
  • Impurity
  • Metallurgy
  • Metals and alloys
  • Refining
  • Titanium

ASJC Scopus subject areas

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


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