Research on Halide Superalloy Windows

Abstract

The fusion casting of alkali halides has been investigated as a means of preparing polycrystalline materials with optical properties approximating those of the corresponding single crystals. The successful production of highly transparent, low-loss blanks of pure KCl and strontium-doped KCl is described. Strengthening of KCl by solid-solution hardening of single crystals and by grain-size control and solid-solution effects in cast and hot-forged materials has been demonstrated to give yield strengths in excess of 9000 psi. Effects of precipitation on mechanical and optical properties are detailed, along with the effect of reactive gas treatments of optical blanks on their 10.6 micrometers low-loss coefficients. Protective films of As2S3 have been deposited with a near intrinsic bulk loss of 1.5/cm measured at 10.6 micrometers.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1973
Accession Number
AD0778108

Entities

People

  • D. W. Readey
  • Perry A. Miles
  • R. T. Newberg

Organizations

  • RTX

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Antireflection Coatings
  • Crystal Structure
  • Crystals
  • Grain Size
  • Heat Treatment
  • Materials Processing
  • Measurement
  • Mechanical Properties
  • Mechanical Working
  • Optical Properties
  • Optics
  • Phase Diagrams
  • Refractive Index
  • Silicon Carbide
  • Single Crystals
  • Stress Strain Relations
  • Yield Strength

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Metallurgy
  • Powder metallurgy of Titanium alloys.