Fabrication and Evaluation of Low Cost Alumina Fiber Reinforced Metal Matrices.
Abstract
Two new fibers have been introduced into the program. Both fibers are SiC with one in a large diameter(140 micron) monofilament form and the other a multifilament yarn. This second fiber has only recently been developed and is produced from an organometallic precursor. The new SiC yarn was characterized as to its surface chemistry, mechanical properties, fracture morphology, and compared with the characteristics of the large diameter monofilament. Powder metallurgical and casting techniques were explored for composite fabrication and it was found that the PM approach offered the greatest success. Lost cost, high rate processing techniques were also successfully used to produce high strength composities using both high and low bonding pressures. In the later case the matrix was densified while partially molten. Composite axial strength, transverse strength, and impact energy were measured. The SiC monofilament reinforced composites offered the highest levels of strength and impact resistance; however, the strength of the fiber-matrix bond severely limited composite transverse strength. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1978
- Accession Number
- ADA062756
Entities
People
- K. M. Prewo
Organizations
- United Technologies Corporation