INTERACTION OF BORON WITH METAL SUBSTRATES AT ELEVATED TEMPERATURES.
Abstract
Boron filaments made by chemical vapor-deposition of the element upon tungsten wires have a modulus of elasticity-to-density ratio several times that for glass filaments. These fibers have been evaluated as a reinforcement in plastic resin matrices and in certain cases the resulting composites exhibit nearly 100 percent of theoretical strength and modulus. The interaction of chemical vapor-deposited boron with a variety of metals at elevated temperatures is examined. Boride formation invariably occurs but an interface of pyrolytic boron nitride effectively precludes diffusion. Because the chemical vapor-deposited amorphous boron is unstable, caution must attend any consideration of this material as a reinforcing medium where extremes of thermal, chemical or mechanical shock occur. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1966
- Accession Number
- AD0487122
Entities
People
- Carol A. Adamiak
- Linwood C. Golf
- Ralph L. Hough
Organizations
- Air Force Research Laboratory