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Effect of Temperature and Pressure to Pinning Centers in Bulk Mgb2 Under High Pressure

  • : Artem Kozyrev, Tatiana Prikhna, Viktor Moshchil
  • : National Academy of Sciences of Ukraine
  • : 2013, Vol 1, p. 199-204
  • : PDF Download
  • : 2013

Abstract

The MgB2-based samples were synthesized at 2 GPa at 800 oC and 1050 oC for 1 hour with and without Ti and SiC. X-ray, SEM and Auger structural studies showed that with increasing of manufacturing temperature grain boundary pinning transforms into point pinning, which is well correlated with the transformation of discontinuous oxygen enriched layers into separately located Mg-B-O inclusions in MgB2. Ti and SiC additions can influence the oxygen and boron distribution, but cannot change the type of pinning at relatively low temperatures.e

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