Paper Title:
Mechanical Properties of Electrodeposited Ni-SiO2 Nanocomposite
  Abstract

Nanocomposite materials consisting of a nanocrystalline Ni matrix with grain size ranging from 23 to 40 nm, and nano-size SiO2 particles with average particle size of 7 nm, have been produced by pulse electrodeposition. Grain size was controlled by peak current density. It was observed that SiO2 particles precipitated within grain interior by the transmission electron microscopy (TEM). Hardness and tensile strength of nanocomposites with a grain size larger than 35 nm was higher than that of nanocrystalline pure Ni possibly as a consequence of Orowan precipitation hardening. However, hardness of Ni-SiO2 nanocomposites with a grain size smaller than 30 nm was the same as that of nanocrystalline pure Ni. It was considered that the SiO2 particles do not contribute to hardening because deformation occurs by a grain-boundary-mediated mechanism such as grain-boundary sliding.

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
1162-1165
DOI
10.4028/www.scientific.net/MSF.654-656.1162
Citation
H. Miyamoto, K. Ueda, T. Uenoya, "Mechanical Properties of Electrodeposited Ni-SiO2 Nanocomposite", Materials Science Forum, Vols. 654-656, pp. 1162-1165, 2010
Online since
June 2010
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Price
$32.00
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