Preparation of niobium disilicide coating by heating niobium in a sodiumsilicon melt

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4 Citations (Scopus)

Abstract

A Niobium disilicide (NbSi2) layer was formed at the surface of Nb plates by heating those plates with Si powder and a piece of Na at 10001200K for 148 h. The thickness of the NbSi2 layer increased to 129μm with increasing temperature and in proportion to the square root of the heating time. The activation energy of the NbSi2 layer formation evaluated from the Arrhenius plot of parabolic growth constants was 160 kJ mol -1. NbSi2-coated Nb plates retained their shapes after heating at 11001700K for 10 h in air. Oxidation of the inner Nb of the plates was prevented.

Original languageEnglish
Pages (from-to)2141-2144
Number of pages4
JournalMaterials Transactions
Volume53
Issue number12
DOIs
Publication statusPublished - 2012

Keywords

  • Coatings
  • Niobium
  • Niobium disilicide
  • Oxidation resistance
  • Sodium flux

ASJC Scopus subject areas

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

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