Premium
Microstructural Evidence for Diffusion‐Driven Tetragonal‐to‐Orthorhombic Phase Transformation in Y‐Ba‐Cu‐O Superconductor
Author(s) -
Park Yong K.,
Lee Ho K.,
Hwang g M.,
Kwon Houk C.,
Park Jong C.,
Yoon Duk N.
Publication year - 1988
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1988.tb05907.x
Subject(s) - tetragonal crystal system , orthorhombic crystal system , materials science , superconductivity , diffusion , microstructure , phase (matter) , phase boundary , crystallography , optical microscope , condensed matter physics , chemistry , scanning electron microscope , crystal structure , thermodynamics , metallurgy , composite material , physics , organic chemistry
Microstructures of Y‐Ba‐Cu‐O superconductor were observed using a polarized microscope. Orthorhombic and tetragonal phases were easily distinguished by the optical etching with cross‐polarized light. In the specimen cooled rapidly in oxygen, it was possible to see the path of oxygen diffusion by observing the variation of the twin concentration. At the boundary between transformed and untransformed materials, evidence for diffusion‐driven transformation could be clearly seen.