Chakraborty, S and Mallick, A R and Debnath, D and Das, Probal Kumar (2015) Densification, mechanical and tribological properties of ZrB2 by SPS: Effect of pulsed current. International Journal of Refractory Metals & Hard Materials , 48. pp. 150-156. ISSN 0263-4368

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Abstract

The influence of direct current pulse on-off patterns on spark plasma sintering of ZrB2 on densification, mechanical and tribological properties has been investigated systematically. The experimental data showed that the maximum relative density (98.65%) is achieved at 50 ms pulse on (t(on)) and 5 ms pulse off (t(off)) time conditions. The maximal Vickers hardness, fracture toughness (DCM) at 1 kgf load, wear volume and wear rate at ION load of the ZrB2 sample (t(on) = 50 ms and t(off) = 5 ms pulse conditions) were 16.64 GPa, 4.69 MPa root m, 4.05 x 10(4) mu m(3) and 1.01 x 10(-3) mm(3)/N. m, respectively. The electric current delivered during SPS processes in different `on-off' pulse patterns plays a vital role in consolidation and desired structural properties. (C) 2014 Elsevier Ltd. All rights reserved.

Item Type:	Article
Subjects:	Engineering Materials
Divisions:	Non-Oxide Ceramics & Composites
Depositing User:	Bidhan Chaudhuri
Date Deposited:	22 Dec 2015 07:16
Last Modified:	22 Dec 2015 07:16
URI:	http://cgcri.csircentral.net/id/eprint/2959

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