Publicação: Uniaxial stress relaxation measurement in fluoroindate glasses
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Glasses of composition 40InF3-20SrF2-16BaF2-20ZnF 2-2GdF3-2NaF (mol%) have been prepared under controlled atmosphere. The time response of the stresses under the application of a constant strain was determined by microellipsometer technique, performed in ambient atmosphere at T < Tg = 294°C. The glasses show a Newtonian behavior at small stress level. During the relaxation process, very small grooves perpendicular to the applied strain appeared on the glass surface and affected its behavior after a time. The formation of these grooves is associated with the ambient atmosphere. Measurements in dry atmosphere showed that humidity was an important parameter in the relaxation process.
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Atmospheric humidity, Composition, Ellipsometry, Indium compounds, Mechanical variables measurement, Molecules, Newtonian flow, Oxides, Strain, Stress relaxation, Thermal effects, Water, Dilation, Fluoroindate glasses, Grooves, Microellipsometer technique, Stress relaxation measurement, Optical glass
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Inglês
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Journal of Non-Crystalline Solids, v. 213-214, p. 336-340.
