DEVELOPMENT OF COMPOSITE STRUCTURAL MATERIALS FOR HIGH TEMPERATURE APPLICATIONS.
Quarterly rept. no. 2, 23 Feb-22 May 66,
GENERAL ELECTRIC CO PHILADELPHIA PA MISSILE AND SPACE DIV
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The purpose of this program is the development of new structural composite materials with high strength-to-weight ratios at elevated temperatures. The current effort is being directed towards the reinforcement of nickel by using ultra-high strength Al2O3 single crystal whiskers. The major emphasis was placed on the fabrication and testing of experimental Ni-Al2O3 whisker composites prepared by electrodeposition and pressure bonding techniques. Substantial progress was made in the whisker growth area. Experiments utilizing an air elutriation technique have demonstrated good potential for beneficiating, classifying and orienting the type of alumina whiskers grown at this laboratory. Studies of electroplated nickel show that it is subject to embrittlement when heated to the temperature range of 800 to 1000 C. Electro formed bundles of whiskers were pressure bonded at higher temperatures than previously used.
- Metallurgy and Metallography