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- W878604497 abstract "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." @default.
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- W878604497 date "2001-05-24" @default.
- W878604497 modified "2023-09-28" @default.
- W878604497 title "Hot isostatic pressing of bulk magnesium diboride: superconducting properties" @default.
- W878604497 hasPublicationYear "2001" @default.
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