The Coefficient of Thermal Expansion of a Super Invar-Ta16W18O94 Composite

[+] Author and Article Information
C. N. Chu, N. Saka, N. P. Suh

Laboratory for Manufacturing and Productivity, Massachusetts Institute of Technology, Cambridge, MA 02139

J. Eng. Mater. Technol 108(3), 270-274 (Jul 01, 1986) (5 pages) doi:10.1115/1.3225880 History: Received April 14, 1985; Online September 15, 2009


The coefficient of thermal expansion (CTE) of a hot pressed Ta16 W18 O94 which was produced from Ta2 O5 and WO3 powders was found to be −1.52×10−6 K−1 in the temperature range 180–330 K. Using the Ta16 W18 O94 and Super Invar powders, 50:50 volume percent metal-ceramic composites were made by the powder metallurgy techniques. When the mixture of constituent powders was hot pressed at 1123 K for 10 minutes, a CTE of 1.1 × 10−6 K−1 was obtained in the temperature range 140–420 K.

Copyright © 1986 by ASME
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