Structural characterization of mechanically milled and annealed tungsten powder

A. S. Bolokang, M. J. Phasha, Kasonde Maweja, S. Bhero

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Nanocrystalline W powders with an average crystallite size of about 50nm were produced by mechanical milling. BCT phase was mechanically induced as a result of BCC lattice deformation (compression) along [110], upon 10h, 20h and 30h milling corresponding to a magnetic saturation of 1.3, 6.9, and 9.8μTm 3/kg. This BCT phase suggests the tetragonal deformation path to be responsible for the observed anomalous magnetism in W. Following DSC-TG thermal analysis, a magnetic saturation of 68μTm 3/kg was obtained upon annealing the 30h milled W powder at 1200°C. In addition, two BCT phases with c/a=1.313 (a=0.29066, c=0.38170nm) and 0.907 (a=0.32602, c=0.29575nm) were detected.

Original languageEnglish
Pages (from-to)27-31
Number of pages5
JournalPowder Technology
Volume225
DOIs
Publication statusPublished - Jul 1 2012

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

Fingerprint Dive into the research topics of 'Structural characterization of mechanically milled and annealed tungsten powder'. Together they form a unique fingerprint.

  • Cite this