MgB2 based superconducting composite materials: processing and shaping aspects for different magnetic applications


Project Director: Dr. Mihai Burdusel

Project ID: PN-III-P1-1.1-PD-2019-0651

Contract number: PD 139

Project acronym: SUPRASHAPE

Funded by: Romanian National Authority for Scientific Research, UEFISCDI

Contractor: National Institute of Materials Physics (NIMP)

Status: In progress

Start date: 04/08/2020

End date: 01/08/2022

Abstract:

The project proposes the manufacture of nanostructured superconducting composites as solid bodies (bulks) with diverse shapes/geometries, obtained from MgB2 powders with different additions, for magnetic shielding and energy storage applications. The aim is also to improve the critical functional parameters, such as critical current density and irreversibility magnetic field, but also to obtain complex shapes directly from the sintering process or through mechanical processing. Innovative solutions are proposed and explored, starting from process-properties-shape correlations, vortex pinning details (from advanced magnetic measurements), but also details on the functional properties, such as trapped magnetic field and shielding factor (from magnetic measurements and Hall sensors) depending on the obtained shapes. The final aim of the project is to obtain a reliable model for the production of complex shapes of the MgB2 ceramic material, competitive in terms of its implementation and commercialization for various magnetic applications (shielding, storage, levitation).

Project objective: The main objective of this project is to obtain through the SPS technique new superconducting composite materials based on MgB2 in various geometric shapes, in order to facilitate the implementation of this material into devices/applications.

Estimated results: Will be developed new bulks superconducting composite materials based on MgB2, which will have improved superconducting functional properties, but also the possibility to be obtained with various geometric shapes directly from the sintering process or by mechanical processing. With such an approach, it will be possible to develop new devices/applications/technologies, especially for magnetic shielding and energy storage, where this superconducting material, MgB2, has proven its potential in these directions. The results of this study may be disseminated through presentations at conferences or through publication in the form of a scientific article, book chapter, or patent.

Project director: Dr. Mihail Burdusel

Mentor: Dr. Lucica Miu

Some of the activities obtained in the project were published in the journal Scientific Reports entitled "On the pinning force in high density MgB2 samples." Scientific Reports 11: 5951, 2021, doi.org/10.1038/s41598-021-85209-2.

During the project, simple and complex shapes were made from the MgB2 composite superconducting material to be tested. The forms were made through the two types of approaches proposed, namely:

- by sintering the powder mixtures based on MgB2 directly in the proposed form (fig. 1);

Fig. 1. MgB2 samples obtained by sintering.

- by mechanical processing with CNC, lathe, or by other methods of sintered samples from powder mixtures based on MgB2 (fig. 2);

Fig. 2. MgB2 samples obtained by sintering and mechanical processing.

Next, we aim to meet the objectives of the project, so the samples obtained will be analyzed structurally and microstructurally to understand the reaction processes during processing and mechanical processing, but also functionally through magnetic measurements and simulations to understand and optimize working parameters. of MgB2-based composite superconducting samples.

Dr. Mihail Burdusel

Scientific Researcher III


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