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Effects of an Applied Magnetic Field on the Directional Solidification of Hg(1-x)Zn(x)Se AlloysDirectionally solidified Hg(0.9)Zn(0.1)Se alloys were studied as an alternative to HgCdTe for the detection of electromagnetic radiation because of predicted improvements in lattice stability. Several boules were grown using a modified Bridgman-Stockbarger method and in an applied magnetic field. Axial compositional profiles showed mass transfer was primarily diffusion controlled. Radial compositional variations were greatly reduced when solidification occurred in an applied magnetic field. Microstructural characteristics and dislocation etch pit densities were greatly improved over HgTe based alloys. The extreme importance of processing conditions on defect generation was illustrated by comparing ampoule configurations and thermal profiles.
Document ID
19990064506
Acquisition Source
Marshall Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Cobb, S. D.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Lehoczky, S. L.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Szofran, F. R.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Jones, K. S.
(Florida Univ. Gainesville, FL United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Subject Category
Metallic Materials
Meeting Information
Meeting: Gravitational Effects in Physico-Chemical Systems
Location: Henniker, NH
Country: United States
Start Date: June 27, 1999
End Date: July 2, 1999
Sponsors: Gordon Research Conferences, Inc.
Distribution Limits
Public
Copyright
Other

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