EXPLORATORY INVESTIGATION OF GLASSMETAL COMPOSITE FIBERS.
Bimonthly progress rept. no. 2, 14 Jun 13 Aug 64,
UNITED AIRCRAFT CORP EAST HARTFORD CONN
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This report is a summary of the investigations conducted during this report period for the development of a process for producing continuous filaments of metal encased in glass. Investigations of the melting characteristics of beryllium in various container materials have been made in an effort to develop a technique for introducing molten beryllium into a glass capillary as the glass is being pulled from tubing to fiber. Beryllium oxide, beryllium oxide-coated graphite, and boron nitride appeared to be satisfactory crucible materials for containing molten beryllium. Controlled flow of the metal from the crucible through an orifice has been complicated by the formation of a protective oxide coating which forms on the metal particles during heating. Research on a process for copper filaments has been chiefly concerned with an apparatus for determining the continuity of the copper core as the copper-glass composites are being drawn. Work on chromium-insilica composite fibers was continued with a high-temperature resistance furnace. Additions to an existing coldwall furnace permit producing silica fibers on a continuous basis. However, attempts to produce a chromiumsilica composite have resulted in an unidentified reaction product. Author