The effect of Mo addition on the microstructure and J(c) properties of MgB2 tapes fabricated by PIT method

Bayazit E., Altin S., Yakinci M. E., Aksan M. A., Balci Y.

JOURNAL OF ALLOYS AND COMPOUNDS, vol.457, no.1-2, pp.42-46, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 457 Issue: 1-2
  • Publication Date: 2008
  • Doi Number: 10.1016/j.jallcom.2007.03.072
  • Journal Name: JOURNAL OF ALLOYS AND COMPOUNDS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.42-46
  • Keywords: MgB2 superconducting system, PIT method, critical current density, J(c), CRITICAL-CURRENT DENSITY, SUPERCONDUCTING PROPERTIES, POWDER, ENHANCEMENT, WIRES
  • Anadolu University Affiliated: Yes

Abstract

We investigated the effect of Mo addition to MgB2/Ag tapes fabricated by the ex situ PIT method. The heat treatments were carried out at 600 degrees C for 24 h under At atmosphere. The structural development, microstructures, superconducting properties and critical current density were characterized by means of XRD, SEM, M-T and M-H measurements. XRD and SEM studies indicated that Mo, not reacting with matrix of MgB2, was formed. The T-c of the tapes decreased in all the addition levels. The maximum J(c) value was obtained to be 1.2 x 10(5) A cm(-2) at 10 K for pure MgB2 tape. Decrease of J(c) was observed with increasing the Mo concentration. The J(c)-H characteristics of the tapes were decreased by the addition of Mo. This is considered to be due to the reduced flux-pinning force in the material. (C) 2007 Elsevier B.V. All rights reserved.