Accession Number : AD0438145


Title :   SILICA FIBER FORMING AND CORE SHEATH COMPOSITE FIBER DEVELOPMENT.


Descriptive Note : Final summary technical rept., 1 Jan-31 Dec 63.


Corporate Author : WHITTAKER CORP SAN DIEGO CALIF NARMCO RESEARCH AND DEVELOPMENT DIV


Report Date : 31 Jan 1964


Pagination or Media Count : 70


Abstract : Silica Fiber Forming: Continuous fused quartz fiber forming was achieved from melts contained in both molybdenum and tungsten bushings operated in an argon atmosphere. Fiber forming temperatures ranged from approximately 2150 C to 2300 C. Tungsten was superior to molybdenum as a bushing material. Fiber forming in helium atmosphere was unsuccessful. Fiber tensile strengths were widely scattered with maximum values of 500, 000 psi being achieved. An optimum tungsten bushing design had not yet been achieved and the useful bushing life was 4 hours at the end of the program. Core-Sheath Fibers: Using a redraw method of fused quartz, Vycor, and Pyrex tubing charged with candidate core materials, the feasibility of the core-sheath fiber was demonstrated with cores of A2O3, ZrO2, and other high modulus polycrystalline materials. (Author)


Descriptors :   *COMPOSITE MATERIALS , *MATERIAL FORMING , FIBERS , PROCESSING , QUARTZ , BUSHINGS , MOLYBDENUM , TUNGSTEN , DRAWING(FORMING) , ARGON , HELIUM , OXIDES , DIOXIDES , ZIRCONIUM COMPOUNDS , TITANIUM COMPOUNDS , CALCIUM COMPOUNDS , PHOSPHATES , FLUORIDES , SULFIDES , COPPER COMPOUNDS , BARIUM COMPOUNDS , TITANATES


Distribution Statement : APPROVED FOR PUBLIC RELEASE