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

Details Hot isostatic pressing of bulk magnesium diboride: mechanical and superconducting properties Hot isostatic pressing of bulk magnesium diboride: mechanical and superconducting properties

2001-05-24

arxiv.org/abs/cond-mat/0105485v3

Physics

Condensed Matter

Superconductivity

13 text pages, 8 figures. Added investigations of the "standard" HIPing cycle II in comparison to the new DMCUP HIPing cycle,

Scientific paper

Two different hot isostatic pressing cycles (HIPing) were investigated to synthesize bulk MgB2 samples: a "standard" cycle where a low vessel pressure is maintained while heating to the process temperature with a subsequent simultaneous pressure and temperature decrease and a new method - dense material cooling under pressure (DMCUP). The latter method allowed the synthesis of dense samples with diameters up to 20 mm and thicknesses up to 10 mm from commercial MgB2 powder. Optimal conditions for the DMCUP method with glass encapsulation (maximum pressure 200 MPa, maximum temperature 1000 C over 200 min, and cooling under pressure) resulted in a dense material with a sharp superconducting transition at 38.5 K. This method employs a pressure which is one order of magnitude less than previously reported for pressure assisted sintering of dense material and can be scaled to larger sample sizes and complex shapes. The data for density, microhardness, fracture toughness and sound speed as well as superconducting properties for bulk magnesium diboride are presented. Ball milling the powder enhances sintering and results in a more homogeneous final microstructure.

Affiliated with

Also associated with

No associations

Rating

Hot isostatic pressing of bulk magnesium diboride: mechanical and superconducting properties does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Hot isostatic pressing of bulk magnesium diboride: mechanical and superconducting properties, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hot isostatic pressing of bulk magnesium diboride: mechanical and superconducting properties will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-538858