Accession Number : ADA311220

Title :   75 Micron YAG-Alumina Eutectic Fiber.

Descriptive Note : Final rept. Aug 95-Jan 96,

Corporate Author : SAPHIKON INC MILFORD NH

Personal Author(s) : Collins, Joseph M.

PDF Url : ADA311220

Report Date : MAR 1996

Pagination or Media Count : 14

Abstract : Crystal growth experiments were conducted to test the application of the Edge-defined Film-fed Growth (EFG(TM)) technique to the growth of 75 micrometers single crystal yttrium aluminum garnet - alumina eutectic fiber (YAE). A total of 21 growth runs were made and fibers were produced with lengths up to 12 meters long. Diameters of the fibers ranged from 70 micrometers to 100 micrometers and growth speeds ranged from 169 to 677 micrometers/min. Fiber microstructures were eutectic with both Chinese script and lamellar morphologies present. The best room temperature tensile strengths were obtained from run #116 with an average tensile strength of 3.19 GPa (463 Ksi) for 20 tests while the highest strength sample tested at 1094 deg C was from run #106 with a tensile strength of 1.74 GPa (253 Ksi) for 20 tests.

Descriptors :   *YTTRIUM ALUMINUM GARNET, *FIBERS, *TENSILE STRENGTH, *CRYSTAL GROWTH, *EUTECTICS, VELOCITY, MICROSTRUCTURE, MORPHOLOGY, ROOM TEMPERATURE, HIGH STRENGTH, ALUMINUM OXIDES.

Subject Categories : Laminates and Composite Materials
      Inorganic Chemistry
      Ceramics, Refractories and Glass
      Atomic and Molecular Physics and Spectroscopy
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE