Fiber Coatings for the Fabrication of Graphite-Reinforced Magnesium Composites,
Abstract
A new fabrication technique for graphite-fiber-reinforced magnesium is presented. An air-stable silicon-dioxide coating is deposited on the fiber surfaces from an organometallic precursor solution. The fibers are passed through this solution followed by hydrolysis or pyrolysis of the organometallic compound to form silicon dioxide on the fiber surfaces. The silicon-dioxide coating facilitates wetting and bonding when the fibers are immersed in molten magnesium. A modification of this coating technique was developed for coating fibers with amorphous carbon, which was found to improve the adhesion between the graphite fibers and the silicon-dioxide coating. Composites containing either T300, P55, or P100 graphite fibers in pure magnesium - 1% silicon, and magnesium alloy AZ91 have been fabricated. Preliminary mechanical property data are presented. Keywords: Alkoxides; Composite fabrication; Fiber coatings; Metal-matrix composites.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 15, 1986
- Accession Number
- ADA168805
Entities
People
- Howard A. Katzman
Organizations
- The Aerospace Corporation