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First direct evidence of size-dependent structural transition in nanosized nickel particles

Abstract : Finely dispersed Ni powders were obtained after chemical reduction of Ni(II) salts by activated sodium hydride in organic solvents. This process allows one to prepare particles in the nanometre range. The particles with sizes smaller than 4nm were found to be hcp whereas larger particles were fcc. To the best of our knowledge, this is the first observation that unsupported Ni powder may crystallize in the hcp system and that the phase stability of this metallic element is particle size dependent.
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https://hal.univ-reims.fr/hal-03561867
Contributor : Fabien Massicot Connect in order to contact the contributor
Submitted on : Tuesday, February 8, 2022 - 3:09:54 PM
Last modification on : Thursday, March 10, 2022 - 2:28:05 PM

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S. Illy, O. Tillement, F. Machizaud, J. Dubois, F. Massicot, et al.. First direct evidence of size-dependent structural transition in nanosized nickel particles. Philosophical Magazine a, Informa UK (Taylor & Francis), 1999, 79 (5), pp.1021-1031. ⟨10.1080/01418619908210344⟩. ⟨hal-03561867⟩

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