Abstract
Samples of MgB2 with relative density above 95% were obtained by spark plasma sintering (SPS) at 1150 °C for a heating time of 100 °C/min and a maximum pressure of 95 MPa. Dwell time was of 1, 4, 7, 10, and 20 min. Samples show that dwell time has a low influence on superconducting characteristics. However, small differences were observed and they are discussed from the viewpoint of density, structural, microstructural, critical current density, irreversibility field, and pinning type. The dominant contribution for all investigated samples is given by point and δ T c pinning.
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Acknowledgements
The authors gratefully acknowledge the financial support from Core Program PN16-480 P2, P3, and POC E-28, Romanian Ministry of Research and Innovation. The authors thank Dr. V. Mihalache and M. Burdusel for help and assistance with XRD measurements and sample preparation.
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Aldica, G., Popa, S., Enculescu, M. et al. Dwell Time Influence on Spark Plasma-Sintered MgB2 . J Supercond Nov Magn 31, 317–325 (2018). https://doi.org/10.1007/s10948-017-4236-9
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DOI: https://doi.org/10.1007/s10948-017-4236-9