U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Comparative Studies of MgB2/Mg Nano-Composites and Press-Sintered MgB2 Pellets

Published

Author(s)

Q Li, L Wu, Y Zhu, A R. Moodenbaugh, G Gu, M Suenaga, Z X. Ye, Daniel A. Fischer

Abstract

We present our studies of superconducting and microstructural properties of bulk MgB2/Mg nano-composites and press-sintered MgB2. TEM investigation revealed that the composites are very dense, consisting of nano-sized MgB2 grains connected by the well-defined clean grain boundaries (GB). Both amorphous and structural intact GBs were observed in thepress-sintered samples. Magnetization and transport measurements showed that the composite carried over 1 MA/cm2 critical current density (Jc) at 5 K and self-field, while the pressed sintered MgB2 has Jc approximately} 0.25 MA/cm2 at 5 K and self-field. The origin of substantially higher Jc found in the composites is mostly due to their nano-sized grains and cleangrain boundaries.
Citation
IEEE Transactions on Applied Superconductivity
Volume
13
Issue
No. 2
Pub Type
Journals

Keywords

critical current, grain boundaries, MgB<sub>2</sub> superconductors, nano-composites
Ceramics and Biomaterials

Citation

Li, Q. , Wu, L. , Zhu, Y. , Moodenbaugh, A. , Gu, G. , Suenaga, M. , Ye, Z. and Fischer, D. (2003), Comparative Studies of MgB<sub>2</sub>/Mg Nano-Composites and Press-Sintered MgB<sub>2</sub> Pellets, IEEE Transactions on Applied Superconductivity (Accessed October 7, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created May 31, 2003, Updated October 12, 2021