Date of Award
Spring 1995
Document Type
Thesis - Restricted
Degree Name
Master of Science (MS)
Department
Mechanical Engineering
First Advisor
Brower, W. E.
Second Advisor
Fournelle, R. A.
Third Advisor
Blumenthal R. N.
Abstract
The rapid quenching of the Bi-Sr-Ca-cu-0 (2223) oxide was studied as a route to continuous production of the 2223 high Tc superconductors by forming in the glassy state. Rapid solidification of the as received BSCCO samples using the shock tube method resulted in the formation of partially glassy preforms in the region of the nominal 2223, the average composition of the flakes being Bi1.4Sr2 . 6Ca2Cu2.650y. The splat flakes were studied using different analytical methods, such as DSC, TMA, SEM with EDX, XRD, and Debye Scherrer powder diffraction technique. The flakes showed continuous flow in TMA (%penetration = 43-93%) and no melting endotherms or crystallization exotherms in DSC. Aggregates of flakes were partially glassy with additional precipitates of Cu, Cu20, and Cao. Results obtained by different analytical techniques were consistent and demonstrated that formable glass with the nominal 2223 composition could be prepared by the rapid solidification method.
Recommended Citation
Golub, Svetlana V., "Glass Formation in the Bi-Sr-Ca-Cu-O Superconductor by Rapid Quenching from the Melt" (1995). Master's Theses (1922-2009) Access restricted to Marquette Campus. 4656.
https://epublications.marquette.edu/theses/4656