Pressure-induced property improvement of magnesium diboride wire

International Cryogenic Materials Conference 2017

Wan, F.^1 ; Sumption, M.D.^1 ; Rindfleisch, M.A.^2 ; Collings, E.W.^1

Center for Superconductor and Magnetic Materials, Department of Materials Science and Engineering, Ohio State University, Columbus

OH

43210, United States^1

Hyper Tech Research Inc, Columbus

OH

43228, United States^2

关键词: Grain connectivity;    High pressure;    Induced properties;    Jc enhancement;    Magnesium diborides;    MgB2 wires;    Powder in tubes;    Transport Jc;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/279/1/012024/pdf
DOI  :  10.1088/1757-899X/279/1/012024

来源: IOP

【 摘 要 】

The 4.2 K non-barrier transport Jcvalues of the powder-in-tube (PIT) in-situ MgB2wires have been enhanced by cold high pressure densification (CHPD). With respect to the control wire, the 1.5 GPa pressure induced the Jcimprovement of the wire at 4.2 K and 10 T by 25 %. The Jcenhancement induced by the CHPD may result from two aspects. First, the CHPD resulted in the reduction of the transverse MgB2core area. Second, the grain connectivity of the PIT in-situ MgB2wire was improved by the CHPD, which is reflected by the reduced porosity.