Comparison of SiC and/or toluene additives to the critical current density of internal Mg diffusion-processed MgB2 wires

S. J. Ye, M. Song, A. Matsumoto, K. Togano, M. Takeguchi, H. Kumakura, Ryo Teranishi, T. Kiyoshi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The internal Mg diffusion (IMD) process produces a MgB2 layer with higher density than that achieved with the traditional Powder-in-tube (PIT) method; this makes the IMD process an attractive one for the fabrication of superconducting MgB2 wires with higher critical current densities (Jc). We have recently shown that co-addition of SiC and some liquid aromatic hydrocarbons (toluene and dimethylbenzene) can enhance the J c of IMD-processed mono-core MgB2 wires. In the present contribution, we discuss the Jc of the IMD-processed mono-core MgB2 wires fabricated under different conditions, viz. with pure B powder, B powder with additive-like SiC or toluene, and B powder with SiC + toluene co-addition. The results from these samples indicated that the SiC + toluene co-addition gave the best Jc value, as in the previous results. The composition and microstructure suggested that carbon substitution for boron and reductions of grain size by SiC and/or toluene additives are responsible for the Jc enhancements of IMD-processed MgB2 wires.

Original languageEnglish
Pages (from-to)167-170
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume484
DOIs
Publication statusPublished - Jan 15 2013

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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