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High temperature (900-1300 C) mechanical behaviour of dendritic web grown silicon ribbons - Strain rate and temperature dependence of the yield stressThe mechanical behavior of dendritic web Si ribbons close the melting point was studied experimentally. The goal of the study was to generate data for modeling the generation of stresses and dislocation structures during growth of dendritic web Si ribbons, thereby permitting modifications to the production process, i.e., the temperature profile, to lower production costs for the photovoltaic ribbons. A laser was used to cut specimens in the direction of growth of sample ribbons, which were then subjected to tensile tests at temperatures up to 1300 C in an Ar atmosphere. The tensile strengths of the samples increased when the temperature rose above 1200 C, a phenomena which was attributed to the diffusion of oxygen atoms to the quasi-dislocation sites. The migration to the potential dislocations sites effectively locked the dislocations.
Document ID
19870043668
Document Type
Reprint (Version printed in journal)
Authors
Mathews, V. K. (Kentucky Univ. Lexington, KY, United States)
Gross, T. S. (Kentucky, University Lexington, United States)
Date Acquired
August 13, 2013
Publication Date
February 1, 1987
Publication Information
Publication: Scripta Metallurgica
Volume: 21
ISSN: 0036-9748
Subject Category
SOLID-STATE PHYSICS
Funding Number(s)
CONTRACT_GRANT: JPL-956571
Distribution Limits
Public
Copyright
Other