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Title: Influence of isothermal hot pressing-doping treatment on the electrical and mechanical properties of bulk Bi-Sr-Ca-Cu-O

Abstract

The influences of (isothermal hot pressing-doping) treatment on the microstructure, electrical and mechanical properties of Bi{sub 2}Sr{sub 3-x}Ca{sub x}Cu{sub 2}O{sub 8+δ} (BSCCO), x ranging from 0.0 to 2 are assessed. BSCCO pellets were prepared by isothermal hot pressing (IHP) technique. The experimental works in this study consists of dc electrical resistivity measurements for electrical and superconducting properties, microhardness tests for mechanical characteristics, powder x-ray diffraction (XRD) for phase analyses (phase ratio), differential thermal analysis (DTA) for melting behaviour and scanning electron microscopy (SEM) for microstructure investigations. The results indicated that the Ca{sup 2+} doping and isothermal hot pressing increased significantly the superconducting transition temperature (T{sup o}{sub c}), which promotes the formation of high-Tc phase. Additionally, Vickers microhardness (VHN), Young's modulus, fracture toughness, brittleness index and elastic stiffness coefficient were also improved. Moreover, IHP-Doping improved the microstructure and the density of the BSCCO studied samples. Microhardness was found to be load dependent. Otherwise, we evaluated the load independent hardness, Young's modulus, fracture toughness and brittleness index of BSCCO samples. The possible reasons for the observed enhancement in electrical and mechanical properties due to (i) the homogeneity of grain region distribution (ii) the enhancement of superconducting phases.

Authors:
 [1]
  1. Physics Department, Faculty of Science, Sohag University, Egypt and University College, Umm Al-Qura University, Alqunfadah (Saudi Arabia)
Publication Date:
OSTI Identifier:
22611480
Resource Type:
Journal Article
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 2; Journal Issue: 4; Other Information: (c) 2012 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2158-3226
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BISMUTH OXIDES; CALCIUM IONS; CALCIUM OXIDES; COPPER OXIDES; CUPRATES; DIFFERENTIAL THERMAL ANALYSIS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; FLEXIBILITY; HIGH-TC SUPERCONDUCTORS; MECHANICAL PROPERTIES; MELTING; MICROHARDNESS; MICROSTRUCTURE; POWDERS; SCANNING ELECTRON MICROSCOPY; STRONTIUM OXIDES; TRANSITION TEMPERATURE; X-RAY DIFFRACTION

Citation Formats

Khalil, S. M. Influence of isothermal hot pressing-doping treatment on the electrical and mechanical properties of bulk Bi-Sr-Ca-Cu-O. United States: N. p., 2012. Web. doi:10.1063/1.4773095.
Khalil, S. M. Influence of isothermal hot pressing-doping treatment on the electrical and mechanical properties of bulk Bi-Sr-Ca-Cu-O. United States. doi:10.1063/1.4773095.
Khalil, S. M. Sat . "Influence of isothermal hot pressing-doping treatment on the electrical and mechanical properties of bulk Bi-Sr-Ca-Cu-O". United States. doi:10.1063/1.4773095.
@article{osti_22611480,
title = {Influence of isothermal hot pressing-doping treatment on the electrical and mechanical properties of bulk Bi-Sr-Ca-Cu-O},
author = {Khalil, S. M.},
abstractNote = {The influences of (isothermal hot pressing-doping) treatment on the microstructure, electrical and mechanical properties of Bi{sub 2}Sr{sub 3-x}Ca{sub x}Cu{sub 2}O{sub 8+δ} (BSCCO), x ranging from 0.0 to 2 are assessed. BSCCO pellets were prepared by isothermal hot pressing (IHP) technique. The experimental works in this study consists of dc electrical resistivity measurements for electrical and superconducting properties, microhardness tests for mechanical characteristics, powder x-ray diffraction (XRD) for phase analyses (phase ratio), differential thermal analysis (DTA) for melting behaviour and scanning electron microscopy (SEM) for microstructure investigations. The results indicated that the Ca{sup 2+} doping and isothermal hot pressing increased significantly the superconducting transition temperature (T{sup o}{sub c}), which promotes the formation of high-Tc phase. Additionally, Vickers microhardness (VHN), Young's modulus, fracture toughness, brittleness index and elastic stiffness coefficient were also improved. Moreover, IHP-Doping improved the microstructure and the density of the BSCCO studied samples. Microhardness was found to be load dependent. Otherwise, we evaluated the load independent hardness, Young's modulus, fracture toughness and brittleness index of BSCCO samples. The possible reasons for the observed enhancement in electrical and mechanical properties due to (i) the homogeneity of grain region distribution (ii) the enhancement of superconducting phases.},
doi = {10.1063/1.4773095},
journal = {AIP Advances},
issn = {2158-3226},
number = 4,
volume = 2,
place = {United States},
year = {2012},
month = {12}
}