Changes in Particle Size and Crystallinity in Ground Nickel Powder

Abstract:

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Nickel powder was dry-milled using a high-energy disc-oscillating mill. The average particle size increases and the specific surface area diminishes with milling time. Crystallite size decreases and microstrains increase, under the same conditions, as shown by X-ray analysis. At 120 min milling time, the crystallite size has a value of 17 nm, i.e., a nanostructured powder, with a perturbed lattice, is obtained. The above results have been compared with published data about the effects of milling on a ceramic powder. There is, in both cases, a general agreement concerning the changes produced in crystallite size. Nevertheless, opposite results are reached regarding particle size and specific surface area.

Info:

Periodical:

Materials Science Forum (Volumes 587-588)

Edited by:

António Torres Marques, António Fernando Silva, António Paulo Monteiro Baptista, Carlos Sá, Fernando Jorge Lino Alves, Luís Filipe Malheiros and Manuel Vieira

Pages:

468-472

DOI:

10.4028/www.scientific.net/MSF.587-588.468

Citation:

J.M. González et al., "Changes in Particle Size and Crystallinity in Ground Nickel Powder", Materials Science Forum, Vols. 587-588, pp. 468-472, 2008

Online since:

June 2008

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Price:

$35.00

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