Accession Number : ADA309441

Title :   The Kinetics of Crystallization of Molten Binary and Ternary Oxide Systems and their Application to the Origination of High Modulus Glass Fibers.

Descriptive Note : Contract rept.,

Corporate Author : UNITED AIRCRAFT RESEARCH LABS EAST HARTFORD CT

Personal Author(s) : Bacon, J. F.

PDF Url : ADA309441

Report Date : NOV 1971

Pagination or Media Count : 312

Abstract : Emphasis on the consideration of glass formation as a kinetic process made it possible to think of glass compositions different from those normally employed in the manufacture of glass fibers. Approximately 450 new glass compositions were prepared and three dozen of these compositions have values for Young's modulus measured on bulk specimens greater than nineteen million pounds per square inch. Of the new glasses about a hundred could be drawn into fibers by mechanical methods at high speeds. The fiber with which we have the most experience has a Young's modulus measured on the fiber of 18.6 million pounds per square inch and has been prepared in ouantity as a nonfilament (to date more than 150 million lineal feet of 0.2 to 0.4 mil fiber have been produced). This fiber has also been successfully incorporated both in epoxy and polyimide matrices. The epoxy resin composite has shown a modulus forty percent better than that achievable using the most common grade of competitive glass fiber, and twenty percent better than that obtainable with the best available grade of competitive glass fiber. Other glass fibers of even higher modulus have been developed but we have very little experience with these as yet. The method of producing modulus from glass composition due to C.J. Phillips has been extended.

Descriptors :   *MODULUS OF ELASTICITY, *CRYSTALLIZATION, *OXIDES, *GLASS FIBERS, *KINETICS, *TERNARY COMPOUNDS, LINEAR SYSTEMS, MECHANICAL PROPERTIES, HIGH VELOCITY, MELTS, CHEMICAL COMPOSITION, EPOXY COMPOSITES, EPOXY RESINS.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Ceramics, Refractories and Glass
      Laminates and Composite Materials
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE