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 language | English |
|---|---|
| Pages (from-to) | 27-31 |
| Number of pages | 5 |
| Journal | Powder Technology |
| Volume | 225 |
| DOIs | |
| Publication status | Published - Jul 1 2012 |
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
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Bolokang, A. S., Phasha, M. J., Maweja, K., & Bhero, S. (2012). Structural characterization of mechanically milled and annealed tungsten powder. Powder Technology, 225, 27-31. https://doi.org/10.1016/j.powtec.2012.03.028