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Effects of Gravity on ZBLAN Glass CrystallizationThe effects of gravity on the crystallization of ZrF(4)-BaF(2)-LaF(3)-AIF(3)-NaF glasses have been studied using the NASA KC-135 and a sounding rocket. Fibers and cylinders of ZBLAN glass were heated to the crystallization temperature in unit and reduced gravity. When processed in unit gravity the glass crystallized, but when processed in reduced gravity, crystallization was suppressed. A possible explanation involving shear thinning is presented to explain these results.
Document ID
Document Type
Reprint (Version printed in journal)
External Source(s)
Tucker, Dennis S.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Ethridge, Edwin C.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Smith, Guy A.
(Alabama Univ. Huntsville, AL, United States)
Workman, Gary
(Alabama Univ. Huntsville, AL, United States)
Date Acquired
August 23, 2013
Publication Date
November 1, 2004
Publication Information
Publication: Annals of the New York Academy of Sciences: Transport Phenomena in Microgravity
Volume: 1027
ISSN: 0077-8923
Subject Category
Nonmetallic Materials
Distribution Limits

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