Preparation of YBa₂Cu₃O_7-δ Superconductor Coating on Austenitic Steel by Electrophoretic Deposition Method-Study on Buffering Layers

Abstract

A preparation method of a superconducting oxides, YBa2Cu3O7-δ, coating on austenitic stainless steel by electrophoretic deposition at high voltages has been investigated in order to increase the J c value. Without a buffering layer, Ni, Cr, and Fe atoms diffused from the substrate to the superconductor phase. It was found that ZrO2 and Ag layers coated on the substrate as the buffering layer restrain the diffusion of the metals. Consequently, high density YBa2Cu3O7-δ superconductor coating could be obtained at high voltage depositions, therefore, it indicated that high J c samples can be prepared by this method.

J c enhancement of electrophoretically deposited YBa2Cu3O7−δ superconducting wire by BaF2 addition

“…Electrophoretic ͑electrophysical͒ deposition [1][2][3][4][5][6][7][8][9][10][11][12][13] is an effective technique to deposit YBa 2 Cu 3 O 7Ϫ␦ ͑YBCO͒ on an irregularly shaped substrate with a simple setup. Many groups have studied this method with various metal substrates ͑Ag, 1-8 Au, 7 Pt, 7 Cu, 9,10 Ni,7,8 Ni-Cr, 7 Kanthal, 7 stainless steel 12 12 and ZrO 2 /stainless steel 12 ͒.…”

“…Many groups have studied this method with various metal substrates ͑Ag, 1-8 Au, 7 Pt, 7 Cu, 9,10 Ni,7,8 Ni-Cr, 7 Kanthal, 7 stainless steel 12 12 and ZrO 2 /stainless steel 12 ͒. Many metals and metal oxides adversely react with YBCO during heat treatment which usually suppresses the transition temperature (T c ) and the critical current density (J c ).…”