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- Title
Characterisation and sintering studies of mechanically milled nano tungsten powder.
- Authors
Sarkar, R.; Ghosal, P.; Premkumar, M.; Singh, A. K.; Muraleedharan, K.; Chakraborti, A.; Bagchi, T. P.; Sarma, B.
- Abstract
Elemental tungsten powder was mechanically milled by planetary mill for 100 h. Particles were thinned down to nanometre scale. The shape of the milled powders was flat cylindrical with average diameter and length 125 and 465 nm respectively. The corresponding crystallite size obtained by X-ray diffraction (XRD) was 2696 nm. The results obtained by XRD and small angle X-ray scattering were well supported by transmission electron microscopy and high resolution transmission electron microscopy results. The maximum shrinkage of the compact has been observed at ∼1500 K, which has been used as a guideline for sintering experiments. The powders sintered at 1773 K have resulted in 96% relative density.
- Subjects
TUNGSTEN; TRANSMISSION electron microscopy; SINTERING; METAL powders; DIFFRACTIVE scattering; POWDER metallurgy
- Publication
Powder Metallurgy, 2008, Vol 51, Issue 2, p166
- ISSN
0032-5899
- Publication type
Article
- DOI
10.1179/174329008X284787