75 Micron YAG-Alumina Eutectic Fiber.

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.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1996
Accession Number
ADA311220

Entities

People

  • Joseph M. Collins

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Ceramic Matrix Composites
  • Composite Materials
  • Crystals
  • Grain Size
  • High Temperature
  • Materials
  • Materials Processing
  • Materials Science
  • Mechanical Properties
  • Metals
  • Microstructure
  • Oxides
  • Single Crystals
  • Tensile Properties
  • Tensile Strength
  • Yttrium
  • Yttrium Aluminum Garnet

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.
  • Reinforced Composite Materials