Elastic constant measurements of polycrystalline infrared window materials. Interim report

Technical Report · Sun Dec 01 04:00:00 EST 1974

OSTI ID:7365355

Kulin, S A; Salzbrenner, R; Neshe, P P

In this work elastic constants of some infrared window materials were calculated from ultrasonic measurements using a pulse overlap technique. Velocity measurements were determined in various directions in CVD ZnSe and in hot forged KCl alloy windows. These measurements permitted the determination of Young's Modulus, the shear modulus, the bulk modulus, and Poisson's Ratio. Some anisotropy was found in the elastic properties of these fabricated or ''as-grown'' infrared windows. For example, in the case of the CVD ZnSe which exhibits a small amount of elastic anisotropy, the elastic properties were found to be isotropic in all directions normal to the growth direction. The modulus values observed for directions in the plane of the ZnSe window were found to change by approximately two percent when measured in directions parallel to the plate growth direction. The experimental results obtained were, in some cases, compared with various calculation approximations which yield polycrystalline elasticity parameters from single crystal data.

• Research Organization: Manlabs, Inc., Cambridge, Mass. (USA)
• OSTI ID: 7365355
• Report Number(s): AD-A-007973
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
ALKALI METAL COMPOUNDS
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CHALCOGENIDES
CHEMICAL COATING
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CHLORIDES
CHLORINE COMPOUNDS
CRYSTALS
DEPOSITION
ELASTICITY
ELECTROMAGNETIC RADIATION
FILMS
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HALOGEN COMPOUNDS
INFRARED RADIATION
LASER MATERIALS
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MECHANICAL PROPERTIES
MONOCRYSTALS
OPENINGS
POISSON RATIO
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
RADIATIONS
SELENIDES
SELENIUM COMPOUNDS
SURFACE COATING
TENSILE PROPERTIES
WINDOWS
ZINC COMPOUNDS
ZINC SELENIDES