Solidification under microgravity conditions - Dendritic growthThe experimental approach and apparatus of a zero-gravity active crystal growth experiment to test dendritic growth theory at low supercoolings are discussed. The experiment consists of 20 experimental cycles. Estimates have been made as to how low gravitational accelerations would have to be reduced to observe convection-free dendritic growth at supercoolings from 0.01-1.0 K. The experiment requires temperature control of + or - 2 mK and photographic resolution of a few microns with a depth of field of + or - 6 mm. The thermostatic bath and temperature control system, photographic system, growth chamber, and dendrite detection system are described in detail.
Document ID
19880047903
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Glicksman, M. E. (Rensselaer Polytechnic Inst. Troy, NY, United States)
Hahn, R. C. (Rensselaer Polytechnic Inst. Troy, NY, United States)
Lograsso, T. A. (Rensselaer Polytechnic Inst. Troy, NY, United States)
Rubinstein, E. R. (Rensselaer Polytechnic Institute, Troy, NY, United States)
Winsa, E. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Subject Category
Materials Processing
Report/Patent Number
AAS PAPER 86-380
Meeting Information
Meeting: Aerospace century XXI: Space sciences, applications, and commercial developments