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) has been overcome by the development of proper annealing and slow cooling procedures. Large castings (5- 1/2 in. diameter) of CaF2 and small castings (3 in. diameter) of SrF2 have been produced with low optical absorption coefficients at 5.25 micrometers. High quality CaF2 castings have been obtained by using as starting material either high purity single crystal chips or 'reagent' grade powder that has been subjected to reactive atmosphere processing (RAP) in teflon vapors.

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Document Details

Document Type
Technical Report
Publication Date
Oct 15, 1974
Accession Number
ADA007656

Entities

People

  • J. Pappis
  • R. T. Newberg

Organizations

  • RTX

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemical Analysis
  • Chemical Synthesis
  • Chemistry
  • Crystal Structure
  • Crystals
  • Heat Treatment
  • Laser Beams
  • Materials
  • Materials Processing
  • Materials Science
  • Measurement
  • Mechanical Properties
  • Mechanical Working
  • Optical Materials
  • Refractive Index
  • Solid Solutions
  • Yield Strength

Fields of Study

  • Materials science

Readers

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

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers