2013 Fiscal Year Final Research Report

Effects of textured micro-structure on the critical current anisotropy of MgB2 superconductor tapes

Research Project

Project/Area Number	23560885
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Material processing/treatments
Research Institution	National Institute for Materials Science
Principal Investigator	KURODA Tsuneo 独立行政法人物質・材料研究機構, 超伝導線材ユニット, フレッシュキャリア (70354305)
Project Period (FY)	2011 – 2013
Keywords	結晶・組織制御 / 硼化マグネシウム / 臨界電流 / 異方性 / 集合組織
Research Abstract	The MgB2 superconductor has been regarded as a promising material for superconducting magnet uses. In this study, we investigated the correlation between the critical current anisotropy and the microstructure of the ex situ powder-in-tube processed MgB2 tapes for obtaining a clue to some improvements in the critical current properties from the viewpoint of making use of the critical current anisotropy. The hard sheath material enhanced the critical current in high magnetic fields through the roll-induced texturing of the tape core, with respect to different orientation relations between the tape and the applied field. Additionally, results of using the slip casting method for fabricating textured powders are reported.