Portal de Periódicos da CAPES

<title>Bulk growth of II-VI crystals in the microgravity environment of USML-1</title>

1993; SPIE; Volume: 2021; Linguagem: Inglês

10.1117/12.164940

1996-756X

Donald C. Gillies, S. L. Lehoczky, Frank R. Szofran, David J. Larson, Ching‐Hua Su, Yi‐Gao Sha, Helga A. Alexander,

Economic Growth and Productivity

The first United States Microgravity Laboratory Mission (USML-1) flew in June 1992 on the Space Shuttle Columbia. An important part of this SpaceLab mission was the debut of the Crystal Growth Furnace. Of the seven samples growth in the furnace, three were bulk grown II-VI compounds, two of a cadmium zinc telluride alloy, and one of a mercury zinc telluride alloy. Ground based results are presented, together with the results of computer simulated growths of these experimental conditions. Preliminary characterization results for the three USML-1 growth runs are also presented and the flight sample characteristics are compared to the equivalent ground truth samples. Of particular interest are the effect of the containment vessel on surface features, and especially on the nucleation, and the effect of the gravity vector on radial and axial compositional variations and stress and defect levels.