Calculation of True Hardness Value of Zn added (BiPb)SrCaCuO Superconductor by Different Models


Toplu A., Karaca I., Kolemen U.

CERAMICS INTERNATIONAL, vol.41, no.1, pp.953-960, 2015 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 41 Issue: 1
  • Publication Date: 2015
  • Doi Number: 10.1016/j.ceramint.2014.09.014
  • Title of Journal : CERAMICS INTERNATIONAL
  • Page Numbers: pp.953-960
  • Keywords: BSCCO superconductor, Indentation Size Effect (ISE), Zn Adding, True Hardness, VICKERS HARDNESS, MICROHARDNESS MEASUREMENTS, MECHANICAL-PROPERTIES, INDENTATION, LOAD, MICROINDENTATION, NANOINDENTATION, CERAMICS, MODULUS

Abstract

Prepared by a wet method (BiPb)SrCaCuO superconductors micro-hardness properties was investigated by dynamic micro-indentation technique. The indentation load-displacement curves of the materials were plotted by applied load varying from 200 to 1800 mN. Micro-hardness numbers carry out from loading-unloading process showed load dependence hardness (LIE), i.e., indentation size effect (ISE). The ISE was examined with the theoretical models such as Meyer's law, the Hays-Kendal approach, the Elastic/Plastic Deformation model, the Proportional Specimen Resistance (PSR) model, and the Modified Proportional Specimen Resistance (MPSR) model. MPSR model was obtained the better model to calculate micro-hardness numbers of samples. According to this calculating result, the true hardness of superconductor were increasing with the increasing of the amount of Zn% and.Bi-2212 phase into mixture. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.