Exaggerated grain growth and improved properties of Y₁ Ba₂ Cu₃ O_7-x by Pt addition

S. X. Dou School of Materials Science and Engineering, University of New South Wales, P.O. Box 1, Kensington, NSW 2033, Australia

J. P. Zhou School of Materials Science and Engineering, University of New South Wales, P.O. Box 1, Kensington, NSW 2033, Australia

N. Savvides CSIRO Division of Applied Science, P.O. Box 218, Lindfield, NSW 2070, Australia

A. J. Bourdillon School of Materials Science and Engineering, University of New South Wales, P.O. Box 1, Kensington, NSW 2033, Australia

C. C. Sorrell School of Materials Science and Engineering, University of New South Wales, P.O. Box 1, Kensington, NSW 2033, Australia

N. X. Tan School of Materials Science and Engineering, University of New South Wales, P.O. Box 1, Kensington, NSW 2033, Australia

K. E. Easterling School of Materials Science and Engineering, University of New South Wales, P.O. Box 1, Kensington, NSW 2033, Australia

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Abstract

Superconducting and mechanical properties of Y₁ Ba₂Cu₃ O₇ can be improved by the use of sintering aids. 0·2 wt% of finely divided laser-ablated platinum powder has been mixed with the parent material and produced a dense product with exaggerated grain growth and improved critical current density and Vickers hardness. At higher concentrations of platinum, while the mechanical properties are further improved, the increased density appeared to inhibit access of oxygen for the tetragonal to orthorhombic phase transition and the current density was reduced.

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Exaggerated grain growth and improved properties of Y₁ Ba₂ Cu₃ O_7-x by Pt addition

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Exaggerated grain growth and improved properties of Y1 Ba2 Cu3 O7-x by Pt addition

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Exaggerated grain growth and improved properties of Y₁ Ba₂ Cu₃ O_7-x by Pt addition