Directional solidification and characterization of Hg(1-x)Cd(x)Te alloysA series of Hg(1-x)Cd(x)Te alloy crystals was grown by high temperature gradient directional solidification at furnace translation rates ranging from 0.068 to 1.12 microns/s. For several ingots, the measured longitudinal compositional profiles were fitted to theoretical profiles to estimate the magnitude of D, the liquid HgTe-CdTe interdiffusion coefficient. The best-fit value of D was about 550,000 sq cm/s. The majority of the ingots showed significant radial compositional variations along the growth axis. These variations are attributed, at least in part, to fluid flows ahead of the growth interface. The results are discussed in terms of the heat transfer characteristics of the alloy/ampule/furnace system, and on the effects of these characteristics on the shape and stability of the growth interface in a 1-g environment.
Document ID
19830062077
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Lehoczky, S. L. (McDonnell-Douglas Research Labs. Saint Louis, MO, United States)
Szofran, F. R. (McDonnell Douglas Research Laboratories St. Louis, MO, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1982
Subject Category
Solid-State Physics
Meeting Information
Meeting: Materials processing in the reduced gravity environment of space; Annual Meeting