Laser-based and thermal studies of stress corrosion in vitreous silica

Journal Article · Tue Oct 01 00:00:00 EDT 1985 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.335860· OSTI ID:5234658

Fisk, G A; Michalske, T A

Crack-propagation rates in vitreous silica were monitored as specimens were heated thermally or irradiated by a laser beam. The laser was tuned to the OH bond vibration to determine the role of OH stretching in the dissociative chemisorption mechanism for stress corrosion of silica in moist environments. Laser radiation heated the silica near the crack tip but did not generate any bond-specific changes in crack velocity. For samples maintained in moist air, the propagation velocity decreases as temperature increases. The temperature dependence of crack velocity indicates that physisorption is an important step in stress corrosion, and a simple model of the process is proposed.

• Research Organization: Sandia National Laboratories, Albuquerque, New Mexico 87185
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5234658
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 58:7; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360605* -- Materials-- Radiation Effects
ADSORPTION
AIR
CHALCOGENIDES
CHEMICAL BONDS
CHEMICAL REACTIONS
CHEMISORPTION
CORROSION
CRACK PROPAGATION
CRACKS
FLUIDS
GASES
HEATING
HYDROXYL RADICALS
LASER-RADIATION HEATING
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PLASMA HEATING
RADICALS
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
STRESS CORROSION
STRESSES