Bhattacharya, Manjima and Chakraborty, Riya and Dey, Arjun and Mandal, Ashok Kumar and Mukhopadhyay, Anoop Kumar (2013) New observations in micro-pop-in issues in nanoindentation of coarse grain alumina. Ceramics International, 39 (2). pp. 999-1009. ISSN 0272-8842

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The present experiments were focused on nanoindentation behaviour and the attendant ``micro-pop-in'' in a dense (similar to 95% of theoretical) coarse-grain (similar to 20 mu m) alumina ceramic as a function of loading rate variations at three constant peak loads in the range of 10(5)-10(6) mu N. Based on the experimental results here we report for the first time, to the best of our knowledge, an increase in intrinsic nano scale contact resistance as well as the nanohardness with the loading rate. These observations were explained in terms of the correlation between the nanoscale plasticity and shear stress active just underneath the nanoindenter. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Item Type: Article
Subjects: Engineering Materials
Depositing User: Bidhan Chaudhuri
Date Deposited: 04 Sep 2013 11:23
Last Modified: 04 Sep 2013 11:23

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