Casting of Halide and Fluoride Alloys for Laser Windows

Abstract

The problem of residual strain in castings of alkali halides (KCl and SrCl2-doped KCl) and alkaline earth fluorides (CaF2 and SrF2) has been overcome by the development of proper annealing and slow cooling procedures. Semiquantitative analysis of absorption coefficients and scattering centers (produced during improper casting and annealing procedures) has shown a corrleation between the two for both the halides at 10 micrometers and fluorides at 5.25 micrometers. Consistently high quality castings of both CaF2 and SrF2 have been fabricated regardless of the starting materials. The dependence of fracture strength on both surface polish and annealing history is evidence that fracture for the fluorides is determined by surface and/or edge flaws.

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Document Details

Document Type
Technical Report
Publication Date
Feb 15, 1976
Accession Number
ADA023460

Entities

People

  • J. Pappis
  • R. T. Newberg

Organizations

  • RTX

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Carbon Monoxide Lasers
  • Chemical Synthesis
  • Chemistry
  • Chlorides
  • Crystal Structure
  • Crystals
  • Heat Transfer
  • Laser Beams
  • Lasers
  • Materials
  • Materials Processing
  • Materials Science
  • Optical Materials
  • Optical Properties
  • Partial Pressure
  • Scattering
  • Yield Strength

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Materials Science and Engineering.
  • Theoretical Analysis.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers