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Effects of Material Transfer by Liquid and Vapor on the Microstructure of Sintered Y‐Ba‐Cu‐O Superconductors
Author(s) -
Cho SeogHyun,
Kim DohYeon,
Khim ZheongG
Publication year - 1989
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.1151-2916.1989.tb07694.x
Subject(s) - microstructure , materials science , sintering , ceramic , superconductivity , bar (unit) , high temperature superconductivity , phase (matter) , atmosphere (unit) , temperature gradient , composite material , analytical chemistry (journal) , metallurgy , mineralogy , thermodynamics , condensed matter physics , chemistry , chromatography , physics , organic chemistry , meteorology , quantum mechanics
Effects of a slight compositional change on the microstructure of sintered Y‐Ba‐Cu‐O superconducting ceramics were investigated. The compositional change was provided either by the liquid which has been formed at the hot end of the rectangular bar specimen sintered under gradient temperature or by the vapor from Y‐Ba‐Cu‐O melt. The results indicated that the Cu and Ba vapor pressure of the sintering atmosphere must be closely controlled to obtain an enhanced densification and a desired single‐phase microstructure.