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Field-Assisted-Sintering of MgB2 superconductor doped with SiC and B4C

G. ALDICA1,* , P. BADICA1,2, J. R. GROZA3

Affiliation

  1. National Institute for Materials Physics, Bucharest-Magurele, Romania
  2. Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
  3. Division of Materials Science and Engineering, Department of Chemical Engineering and Materials Science, University of California, Davis, California, USA

Abstract

Field Assisted Sintering Technique (FAST) is currently used to consolidate ceramic, metal and composite powders. This method combines a pulsed electrical current with simultaneous application of an external pressure. In this article we report fabrication by FAST of high density MgB2 ceramic with addition of 5% SiC and 5% B4C. The influence of sintering conditions such as temperature and time on bulk density, morphology and superconducting properties of the samples was investigated. All samples had bulk density of more than 90% of the theoretical one and the same critical temperature Tc = 38.5 K from magnetisation measurements. These preliminary results suggest that FAST is a promising method for processing of MgB2 superconductor..

Keywords

Field Assisted Sintering Techniques, MgB2 superconductor, SiC and B4C doping.

Submitted at: Nov. 14, 2006
Accepted at: June 15, 2007

Citation

G. ALDICA, P. BADICA, J. R. GROZA, Field-Assisted-Sintering of MgB2 superconductor doped with SiC and B4C, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 6, pp. 1742-1745 (2007)