The influence of CuO on the grain growth kinetics, densification and microstructure of YBa2Cu3O7-δ was studied. The YBa2Cu3O7-δ material with sufficient liquid phase revealed a grain growth exponent of about 0.25 after isothermal annealing at 990°C. The addition of CuO greatly enhanced the densification during sintering through the presence of the liquid phase. A microstructure containing highly aligned grains (d > 200 μm) was produced by a compositional gradient of CuO powder.
Bibliographical noteFunding Information:
The authorsw ouldlike to thankD r. David Haase for valuabled iscussionsT. his work was supported by a grantf rom the Ofice of BasicE nergyS cience, Departmenot f Energy,u nderG rant No. DE-FGOS-88ER45359F. urtherf inancials upportw asr eceived through the subcontractN o. 87X-SG688V from Martin MariettaE nergyS ystemsD, epartmenot f Energy,O RNL, HTSC Pilot Center.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering