Refining effect of Ar-H2 plasma arc melting of Nb-based alloy

D. Elanski, K. Mimura, M. Isshiki

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Ar-H2 plasma arc melting of Nb-based alloy revealed that elimination of Ti, Fe and Al has a diffusion nature, controlled by diffusion in the gas and, at lower Al and Fe concentrations, by diffusion in the metal. Hydrogen addition to the plasma gas resulted in a remarkably higher removal rate of the impurities. Shaking of the specimen is effective in accelerating the process at lower Al and Fe concentrations. The dominant reason for the influence Of H2 addition on the purification process is changes of the melted metal temperature.

Original languageEnglish
Pages (from-to)845-847
Number of pages3
JournalVacuum
Volume47
Issue number6-8
DOIs
Publication statusPublished - 1996

Keywords

  • Hydrogen plasma
  • Niobium
  • Niobium-based alloy
  • Plasma arc melting
  • Refining

ASJC Scopus subject areas

  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films

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