Advanced Powder Technology, Vol.7, No.3, 233-244, 1996
Microstructure control of an oxide superconductor by a hybridization process through grinding
A synthetic process for the nanocomposite of a Ba2YCu3O7-y superconductor and silver was examined. Hybridization through grinding promoted the unform dispersion of silver ultrafine particles (of the order of 10 nm diameter) in the Ba2YCu3O7-y matrix. Hot isostatic pressing (HIP) sintering suppressed the undesirable grain growth of silver of the order of 100-300 nm in the sintered body. Enhancement of both superconducting transport current and magnetic flux pinning properties was promoted by the control of the post-annealing condition of the HIP body.