Effect of Mechanical Milling and Cold Pressing on Co Powder
Joint Authors
Motaung, D. E.
Phasha, M. J.
Bhero, S.
Bolokang, A. S.
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-02-02
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
Cold pressing (CP) of the amorphous-like Co powder suppressed most of the XRD peaks, in particular the peak along (100) plane.
The DSC curve of unmilled CP Co powder has shown a distinct sharp exothermic peak at 615C°.
Upon annealing at 700C°, only the FCC phase with lattice parameter of 3.51 Å was detected by XRD.
Our results implied that the exotherm at 615C° corresponds to compaction-pressure-assisted HCP to FCC first-order phase transition.
The XRD analysis of 30 h milled powder revealed for the first time the FCC phase with a=3.80 Å.
However, due to presence of (100) and (210) peaks, this phase is thought to be FCT with lattice parameters a=b=3.80 and c=3.07 Å.
Consequently, the high-energy milling carried out in the current work induced for the first time HCP to FCT transition in Co.
Upon CP of milled powder, the lattice parameter a shrunk from 3.80 to 3.75 Å.
However, during annealing of the CP milled Co powder at 750C°, the FCT to FCC transition occurred, yielding the FCC phase with a=3.51 Å.
American Psychological Association (APA)
Bolokang, A. S.& Phasha, M. J.& Motaung, D. E.& Bhero, S.. 2012. Effect of Mechanical Milling and Cold Pressing on Co Powder. Journal of Metallurgy،Vol. 2012, no. 2012, pp.1-7.
https://search.emarefa.net/detail/BIM-460812
Modern Language Association (MLA)
Bolokang, A. S.…[et al.]. Effect of Mechanical Milling and Cold Pressing on Co Powder. Journal of Metallurgy No. 2012 (2012), pp.1-7.
https://search.emarefa.net/detail/BIM-460812
American Medical Association (AMA)
Bolokang, A. S.& Phasha, M. J.& Motaung, D. E.& Bhero, S.. Effect of Mechanical Milling and Cold Pressing on Co Powder. Journal of Metallurgy. 2012. Vol. 2012, no. 2012, pp.1-7.
https://search.emarefa.net/detail/BIM-460812
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-460812