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Effect of electric field on the nanoindentation of zinc sulfide

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2 Author(s)
Yang, Fuqian ; Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, USA ; Dang, Hongmei

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Local softening was observed for the nanoindentation of a polycrystalline ZnS in an electric field. The indentation load was in the range of 35–100 μN, and the electric field intensity was in the range of 0.5–2 V/mm. The indentation hardness decreased with increasing the electric field intensity. This effect was likely due to the electromechanical interaction which changed the effective resolved shear stress and the average velocity of charged dislocations. A critical increment in the resolved shear stress was obtained at which the average velocity of the charged dislocations is the same as that in the absence of electric field.

Published in:

Journal of Applied Physics  (Volume:105 ,  Issue: 5 )