High-Tc Ceramic Superconductors Through Oxidation of Mechanically Alloyed Y-Ba-Cu and Bi-Sr-Ca-Cu Powders
The high-Tc ceramic superconductors YBa2Cu3Oy and BiSrCaCu2Oy are synthesized through oxidation of master alloy powders produced by mechanical alloying. The effects of the milling time and subsequent oxidation conditions on the formation of the superconducting phase are studied. A homogeneous distribution of the constituent elements Y, Ba and Cu in YBa2Cu3 master alloy powders is achieved within the resolution of 0.1–0.3 μm after mechanical alloying for 36h in Ar gas atmosphere. Preliminary results for the BiSrCacu2Oy system are also reported.
KeywordsMechanical Alloy Alloy Powder Mill Time Sinter Technique Aichi Prefectural
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