Modeling of Nano-Tungsten Sintering Data

Report No. ARL-CR-0665
Authors: William S. de Rosset
Date/Pages: April 2011; 26 pages
Abstract: Small metal samples have been made from nano-crystalline tungsten powder by sintering with the goal of producing high density parts. The parameters associated with sintering runs have been examined to see if there is an empirical relationship between them and the final part density. A function that depends on the time the sample spends above a critical temperature has been formulated that represents one specific batch of tungsten powder. The function has been applied to other batches of powder with limited success. An attempt was made to use this function to arrive at the sintering parameters that would give a final density in excess of 95% that of theoretical density while retaining a nano-crystalline grain structure.
Distribution: Approved for public release
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Last Update / Reviewed: April 1, 2011