- Link to Full Text: http://trs.nis.nasa.gov/search.jsp?R=20040161577&hterms=edwin+ethridge&qs=Nm%3D123%7CCollection%7CNASA%2520STI%7C%7C17%7CCollection%7CNACA%7C%7C125%7CCollection%7CNIX%26Ntx%3Dmode%2520matchallpartial%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3Dedwin%2520ethridge
It has been observed by two research groups that ZrF4-BaF2-LaF3-AlF3-NaF (ZBLAN) glass crystallization is suppressed in microgravity. The mechanism for this phenomenon is unknown at the present time. In order to better understand the mechanism, an experiment was performed on NASA's KC135 reduced gravity aircraft to obtain quantitative crystallization data. An apparatus was designed and constructed for performing rapid thermal analysis of milligram quantities of ZBLAN glass. The apparatus employs an ellipsoidal furnace allowing for rapid heating and cooling. Using this apparatus nucleation and crystallization kinetic data was obtained leading to the construction of time-temperature-transformation curves for ZBLAN in microgravity and unit gravity.
- Date Published: 2004-01-01
- Is publication family-friendly: true
- Publication Type: Preprint
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