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- Uniaxial stress relaxation measurement in fluoroindate glasses
- Universidade de São Paulo (USP)
- Universidade Estadual Paulista (UNESP)
- Institut für Neue Materialien
- 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.
- Journal of Non-Crystalline Solids, v. 213-214, p. 336-340.
- Atmospheric humidity
- Indium compounds
- Mechanical variables measurement
- Newtonian flow
- Stress relaxation
- Thermal effects
- Fluoroindate glasses
- Microellipsometer technique
- Stress relaxation measurement
- Optical glass
- Acesso restrito
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