The coefficient of thermal expansion of a super invar-Ta/sub 16/W/sub 18/O/sub 94/ composite
- Resource Type
- Journal Article
- Authors
- Source
- J. Eng. Mater. Technol.; (United States); 108:3
- Subject
- 36 MATERIALS SCIENCE COMPOSITE MATERIALS
THERMAL EXPANSION
INVAR
TANTALUM OXIDES
TUNGSTEN OXIDES
CERAMICS
HOT PRESSING
LOW TEMPERATURE
MEDIUM TEMPERATURE
METALS
POWDER METALLURGY
POWDERS
VERY HIGH TEMPERATURE
ALLOYS
CHALCOGENIDES
ELEMENTS
EXPANSION
FABRICATION
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MATERIALS WORKING
METALLURGY
NICKEL ALLOYS
OXIDES
OXYGEN COMPOUNDS
PRESSING
REFRACTORY METAL COMPOUNDS
TANTALUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS 360603* -- Materials-- Properties
- Language
- English
The coefficient of thermal expansion (CTE) of a hot pressed Ta/sub 16/W/sub 18/O/sub 94/ which was produced from Ta/sub 2/O/sub 5/ and WO/sub 3/ powders was found to be -1.52x10/sup -6/K/sup -1/ in the temperature range 180-330 K. Using the Ta/sub 16/W/sub 18/O/sub 94/ 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 1.1x10/sup -6/K/sup -1/ was obtained in the temperature range 140-420 K.