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Spatial variations in ac susceptibility and microstructure for the YBa2Cu3O(7-x) superconductor and their correlation with room-temperature ultrasonic measurementsThe spatial (within-sample) uniformity of superconducting behavior and microstructure in YBa2Cu3O(7-x) specimens over the pore fraction range of 0.10 to 0.25 was examined. The viability of using a room-temperature, nondestructive characterization method (ultrasonic velocity imaging) to predict spatial variability was determined. Spatial variations in superconductor properties were observed for specimens containing 0.10 pore fraction. An ultrasonic velocity image constructed from measurements at 1 mm increments across one such specimen revealed microstructural variation between edge and center locations that correlated with variations in alternating-current shielding and loss behavior. Optical quantitative image analysis on sample cross-sections revealed pore fraction to be the varying microstructural feature.
Document ID
19910012240
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Roth, Don J. (Case Western Reserve Univ. Cleveland, OH., United States)
Deguire, Mark R. (Grace (W. R.) and Co. Columbia, MD., United States)
Dolhert, Leonard E. (Grace, W. R. and Co., Columbia MD., United States)
Hepp, Aloysius F. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1991
Subject Category
Quality Assurance And Reliability
Report/Patent Number
NASA-TM-103787
E-6064
NAS 1.15:103787
Meeting Information
Meeting: Annual Meeting of the American Ceramic Society
Location: Cincinnati, OH
Country: United States
Start Date: April 28, 1991
End Date: May 2, 1991
Accession Number
91N21553
Funding Number(s)
PROJECT: RTOP 506-43-11
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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