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Evidence for the formation mechanism of nanoscale microstructures in cryomilled Zn powder

✍ Scribed by X. Zhang; H. Wang; J. Narayan; C.C. Koch

Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 416 KB
Volume: 49
Category: Article
ISSN: 1359-6454
DOI: 10.1016/s1359-6454(01)00051-9

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✦ Synopsis

Nanocrystalline Zn powder has been synthesized by a cryomilling method. The average grain size decreased exponentially with the cryomilling time and reached a minimum average grain size of around 17 nm. Large numbers of small grains (2ෂ6 nm) have been found in the very early stages of cryomilling. Dynamic recrystallization was used to explain the observed phenomena. The exothermic peaks revealed in the differential scanning calorimetry (DSC) results were correlated with the release of microstrain as confirmed by the x-ray diffraction measurements.

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