The optimal growth of single grain bulk Y-Ba-Cu-O superconductors with Nd-Ba-Cu-O thin film seed

Chia Ming Yang, Shang Yu Wang, Yi Chang Huang, Po Wei Chen, In Gann Chen, Maw Keun Wu

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The NdBCO thin film on MgO substrate is widely used as a seed for growing large, single grain bulk REBCO superconductors, due to its good epitaxy and superheating effect. While the NdBCO thin film seed is put on YBCO precursor pellets and heated above the peritectic temperature, it will be destroyed by the liquid phase of the Ba-Cu-O component. The exposed MgO substrate is found in the destroyed seed, resulting in the undesirable growth of (001) and (103) c-axis oriented grains. However, this can be avoided by carefully controlling the two steps of cooling during heterogeneous nucleation on the seeds, which also eliminates the homogeneous nucleated subgrains. The optimal growth conditions and morphology diagram of TSMG process by NdBCO thin film seeds are constructed in this work to aid in engineering fabrication, along with the coordinate system of temperature and welding time instead of temperature and degree of overcooling.

Original languageEnglish
Article number6387301
JournalIEEE Transactions on Applied Superconductivity
Volume23
Issue number3
DOIs
Publication statusPublished - 2013 Jan 28

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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