EVALUATION OF SAPPHIRE WOOL AND ITS INCORPORATION INTO COMPOSITES OF HIGH STRENGTH.
Abstract
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 Ni/Ti 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1966
- Accession Number
- AD0805285
Entities
People
- C. A. Bruch
- E. Feingold
- R. L. Mehan
Organizations
- General Electric