Hot isostatic pressing of bulk magnesium diboride: Mechanical and superconducting properties

Hot isostatic pressing of bulk magnesium diboride: Mechanical and superconducting properties

Hot isostatic pressing with glass encapsulation (pressure, 200MPa; temperature, 1000C over 200min; cooling under pressure) was used to synthesize bulk MgB 2 with diameters up to 20mm and thicknesses up to 10mm from MgB 2 powder. A sharp superconducting transition was measured at 38.5K. This method c...

Full description

Saved in:
Bibliographic Details
Published in:Philosophical magazine letters Vol. 81; no. 12; pp. 849 - 857
Main Authors: Indrakanti, S.S., Nesterenko, V. F., Maple, M. B., Frederick, N. A., Yuhasz, W. H., Li, Shi
Format: Journal Article
Language:English
Published: London Taylor & Francis Group 01-12-2001
Taylor & Francis
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Effects of material synthesis, crystal structure, and chemical composition
Exact sciences and technology
Physics
Superconductivity
Transition temperature variations
Electrical conductivity
Ball mill
Superconducting transitions
Hot isostatic pressing
Mechanical properties
Microhardness
Sound velocity
Magnetic susceptibility
Experimental result
Powder technology
High-Tc superconductors
Microstructure
Fracture toughness testing
Magnesium borides
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Hot isostatic pressing with glass encapsulation (pressure, 200MPa; temperature, 1000C over 200min; cooling under pressure) was used to synthesize bulk MgB 2 with diameters up to 20mm and thicknesses up to 10mm from MgB 2 powder. A sharp superconducting transition was measured at 38.5K. This method can be scaled to larger sample sizes and complex shapes. The data for density, microhardness, fracture toughness and sound speed for bulk magnesium diboride are presented. Ball milling the powder results in a more homogeneous final microstructure with a higher resistivity and with a similar superconducting transition.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0950-0839
1362-3036
DOI:10.1080/09500830110093236