Effects of ZnO addition on mechanical properties of Bi1.84Pb0.34Sr1.91Ca2.03Cu3.06O10 prepared by a wet technique


Karaca I., Uzun O., Koelemen U. , Yilmaz F., Sahin O.

JOURNAL OF ALLOYS AND COMPOUNDS, vol.476, no.1-2, pp.486-491, 2009 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 476 Issue: 1-2
  • Publication Date: 2009
  • Doi Number: 10.1016/j.jallcom.2008.09.077
  • Title of Journal : JOURNAL OF ALLOYS AND COMPOUNDS
  • Page Numbers: pp.486-491
  • Keywords: Bi-2223, Wet technique, ZnO, Mechanical properties, Depth Sensing Indentation, SENSING INDENTATION TECHNIQUE, CRITICAL-CURRENT-DENSITY, CU-O SUPERCONDUCTORS, POLYCRYSTALLINE SUPERCONDUCTORS, SINGLE-CRYSTALS, DYNAMIC HARDNESS, NANOINDENTATION, MICROHARDNESS, CERAMICS, MODULUS

Abstract

In this study, ZnO molar wt% 0, 5,10,20,30, and 50 added Bi1.84Pb0.34Sr1.91Ca2.03Cu3.06O10 superconductors were prepared by wet technique. The experimental works consist of powder X-ray diffraction (XRD) for phase analyses and c-axes parameters, scanning electron microscopy (SEM) for microstructure examination, and microhardness measurements for mechanical properties. These measurements showed that Zn-added material, in comparison with the pure sample, had increased c-axes parameters and decreased grain size. In addition, the experimental results of microhardness measurements were analyzed using Oliver-Pharr model. It was observed that the change of indentation hardness (H-rr) and reduced elastic modulus (E-r) values showed an increasing trend with ZnO addition and exhibited peak load dependence (i.e., indentation size effect (ISE)). (C) 2008 Elsevier B.V. All rights reserved.