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Cooling rates for glass containing lunar compositionsCooling rates required to form glassy or partly-crystalline bodies of 14 lunar compositions have been estimated using a previously introduced, simplified model. The calculated cooling rates are found to be in good agreement with cooling rates measured for the same compositions. Measurements are also reported of the liquidus temperature and glass transition temperature for each composition. Inferred cooling rates are combined with heat flow analyses to obtain insight into the thermal histories of samples 15422, 14162, 15025, 74220, 74241, 10084, 15425, and 15427. The critical cooling rates required to form glasses of 24 lunar compositions, including the 14 compositions of the present study, are suggested to increase systematically with increasing ratio of total network modifiers/total network formers in the compositions. This reflects the importance of melt viscosity in affecting glass formation.
Document ID
19830040106
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Fang, C. Y.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Yinnon, H.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Uhlmann, D. R.
(MIT Cambridge, MA, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1983
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: Houston, TX
Start Date: March 15, 1982
End Date: March 19, 1982
Accession Number
83A21324
Distribution Limits
Public
Copyright
Other

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