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Published January 1, 1997 | public
Journal Article Open

Noncontact modulation calorimetry of metallic liquids in low Earth orbit


Noncontact modulation calorimetry using electromagnetic heating and radiative heat loss under ultrahigh-vacuum conditions has been applied to levitated solid, liquid, and metastable liquid samples. This experiment requires a reduced gravity environment over an extended period of time and allows the measurement of several thermophysical properties, such as the enthalpy of fusion and crystallization, specific heat, total hemispherical emissivity, and effective thermal conductivity with high precision as a function of temperature. From the results on eutectic glass forming Zr-based alloys thermodynamic functions are obtained which describe the glass-forming ability of these alloys.

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©1997 The American Physical Society Received 29 July 1996 We acknowledge stimulating discussions with Professor G. Frohberg (TU-Berlin), Professor William Hofmeister (Vanderbilt University), and Dr. G. Lohöfer (DLR Cologne) and the excellent support of the MUSC team at DLR Cologne. R.K.W. and H.J.F. acknowledge financial support from DARA (Grant No. 50 WM 94-31-4), D.S.L. and W.L.J. from NASA (Grant No. NAG8-954/NAG9-1192).


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