Development of Polycrystalline Alkali Halides by Strain Recrystallization for Use as High Energy Infrared Laser Windows.

摘要

The compressive deformation processing of pure KCl and KCl single crystals alloyed with Eu,Rb or Br has been investigated. The variables evaluated in this infrared alloy window fabrication process included temperature,total strain,strain rate,heating and cooling cycles,and quality and orientation of the single crystal starting material. Experimental conditions required to produce crack-free windows were established. Mechanical testing and microstructural observations were performed on such windows. This work has shown the feasibility of producing KCl alloy windows having high mechanical strengths. Further,processing conditions were developed which appear to establish the feasibility of scale-up for the fabrication of windows of very large sizes. (Author)