DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click HERE
to register or log in.
EVALUATION OF SAPPHIRE WOOL AND ITS INCORPORATION INTO COMPOSITES OF HIGH STRENGTH.
Final summary technical rept. May 65-Jun 66,
GENERAL ELECTRIC CO PHILADELPHIA PA MISSILE AND SPACE DIV
Pagination or Media Count:
This program was concerned with 1 the fabrication of alpha-Al2O3 wool whisker-aluminum composites of high strength, 2 the characterization of the resulting composites and 3 the determination of the strength of alpha-Al2O3 wool whiskers as affected by various fabrication processes. The results of this program over the past contract year are summarized as follows 1 Composite strengths as high as 54,900 psi at 532 C were obtained. This represents about a hundred-fold strength increase over pure aluminum and, on a strength to density ratio, is competitive with titanium alloys at the same temperature. A total of 62 specimens were fabricated and tested during the contract period. 2 Tests on individual whiskers revealed a metal coatings have no deleterious effects on whisker strength after a high temperature heat-treatment, b high temperature properties of NiTi coated whiskers are the same as uncoated whiskers, and c no strength degradation was detected in whiskers which had been extracted from an infiltrated composite.
APPROVED FOR PUBLIC RELEASE