2002/12/21 by V. F. Nesterenko, Vitali F. Nesterenko, Nesterenko, Vitali F.
Engineering · Materials Science · Physics and Astronomy · #Aluminum Alloys Composites Properties #Boron and Carbon Nanomaterials Research #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Metal and Thin Film Mechanics #Superconductivity (cond-mat.supr-con) #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0212543
15 pages, 10 figures, 1 table. Invited talk at Eleventh International Symposium on Processing and Fabrication of Advanced Materials, ASM Materials Solutions, 2002, October 7-10, Columbus, Ohio. Conference Proceedings, in press
arxiv created 2002/12/21 · openalex publication_date 2002/12/21 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Hot Isostatic Pressing was applied to synthesize bulk samples with diameter up to 30 mm starting with Alfa Aesar magnesium diboride powder. HIPing at 2 kbar, 1000 C with cooling under pressure (DMCUP cycle) resulted in a fully dense (or low porosity) material with a sharp superconducting transition and critical current comparable with the best reported. Elastic constants were measured using method of resonant ultrasound spectroscopy. Their values for most dense samples (bulk modulus 142.5 GPa and Young's modulus 272.5 GPa) are close to theoretically predicted values for solid magnesium diboride. Porosity is resposible for lower values of elastic constants. Fracture toughness is evaluated based on measurements of microhardness and elastic constants. Upper critical field and irreversibility field are comparable with data for samples sintered at 3 GPa. Microstructural propeties of HIPed smaples are responsible for enhanced flux pinning. Method allows scaling of the size of the samples and manufacture of complex shapes.