Study of Transport and Micro-structural properties of Magnesium Di-Boride Strand under react and bend mode and bend and react mode

10th Asia Plasma and Fusion Association Conference

Kundu, Ananya^1 ; Kumar Das, Subrat^1 ; Bano, Anees^1 ; Pradhan, Subrata^1

Institute for Plasma Research, Near Indira Bridge, Bhat, Gandhinagar

382 428, India^1

关键词: Cryocoolers;    IV characterization;    Micro-structural properties;    Sample holders;    SEM analysis;    Transport measurements;    Universal testing machines;    Winding tension;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/823/1/012046/pdf
DOI  :  10.1088/1742-6596/823/1/012046

来源: IOP

【 摘 要 】

I-V characterization of commercial multi-filamentary Magnesium Di-Boride (MgB2) wire of diameter 0.83 mm were studied in Cryocooler at self-field I-V characterization system under both react and bend mode and bend and react mode for a range of temperature 6 K - 25 K. This study is of practical technical relevance where the heat treatment of the superconducting wire makes the wire less flexible for winding in magnet and in other applications. In the present work the bending diameter was varied from 40 mm to 20 mm and for each case critical current (Ic) of the strand is measured for above range of temperature. A customized sample holder is fabricated and thermally anchored with the 2ndcold stage of Cryocooler. It is observed from the measurement that the strand is more susceptible to degradation for react and bend cases. The transport measurement of the strand was accompanied by SEM analyses of bend samples. Also the tensile strength of the raw strands and the heat treated strands were carried out at room temperature in Universal Testing Machine (UTM) to have an estimate about the limiting winding tension value during magnet fabrication.