19 December 1986 Mechanical Properties Of Chalcogenide Glasses
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The elastic modulus, hardness, and fracture energy were measured for 'simple' chalcogenide glasses (e.g., Se and As2S3) and for more complicated glasses (e.g., Ge33As12Se55 and 0.3PbSe - 0.7Ge1.5As0.5Se3). Although the more complicated glasses tended to have improved mechanical properties (i.e., higher elastic modulus and hardness), this was not always the case, i.e. fracture energy varied. Further investigation is necessary to clarify the effect of composition on mechanical properties. The stress corrosion susceptibility, n, of As2S3 infrared fibers and bulk glass was compared and shown to be similar for two different techniques of measurement; Slow crack growth measurements on bulk glass using the constant double cantilever beam determined n to be 17. Strength - stressing rate experiments on fibers determined n to be between 11 and 17 depending on processing. Fracture surface analysis of these fibers and other bulk glasses showed that we can expect different fracture characteristics for chalcogenide glasses than for silicates possibly due to the existence of viscoelastic effects during fracture.
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E. Hartouni, E. Hartouni, J. J. Mecholsky, J. J. Mecholsky, } "Mechanical Properties Of Chalcogenide Glasses", Proc. SPIE 0683, Infrared and Optical Transmitting Materials, (19 December 1986); doi: 10.1117/12.936421; https://doi.org/10.1117/12.936421


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