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 |
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All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
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Structural characterization of mechanically milled and annealed tungsten powder. / Bolokang, A. S.; Phasha, M. J.; Maweja, Kasonde; Bhero, S.
In: Powder Technology, Vol. 225, 01.07.2012, p. 27-31.Research output: Contribution to journal › Article
TY - JOUR
T1 - Structural characterization of mechanically milled and annealed tungsten powder
AU - Bolokang, A. S.
AU - Phasha, M. J.
AU - Maweja, Kasonde
AU - Bhero, S.
PY - 2012/7/1
Y1 - 2012/7/1
N2 - 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.
AB - 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.
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U2 - 10.1016/j.powtec.2012.03.028
DO - 10.1016/j.powtec.2012.03.028
M3 - Article
VL - 225
SP - 27
EP - 31
JO - Powder Technology
JF - Powder Technology
SN - 0032-5910
ER -