Investigation of chemical-durability mechanism in fluoride glasses. Annual report No. 2, report 1 July 1984-30 June 1985

Technical Report · Sun Dec 01 00:00:00 EST 1985

OSTI ID:5954358

Simmons, C J; Simmons, J H

In previous research, leaching data on two families of fluoride glasses were collected in aqueous media and in solutions buffered at various pH values. The corrosion process was analyzed, leading to the development of a model for dissolution. In this 2nd year of research, the dissolution model was broken down into component mechanisms and each component analyzed separately. While many processes take part in the aqueous corrosion of fluoride glasses, the authors have identified the results of these processes and have developed a quantitative description of each part and of what role it plays in the dissolution of zirconium-fluoride based glasses. They are currently applying this analysis method to thorium-fluoride glasses and are preparing a publication on those results. The comparison between the leach rates of different classes of fluoride glasses (ZrLF4, ThF4 and UF4) has been of great value in understanding the effect of composition variations on the leaching processes. Monitoring the pH variations and conducting tests in pH buffered solutions have led us to understanding the effects that enhance the corrosion rate of these glasses and make them far less durable than silicates.

• Research Organization: Florida Univ., Gainesville (USA). Dept. of Materials Science and Engineering
• OSTI ID: 5954358
• Report Number(s): AD-A-162740/5/XAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
GLASS
CORROSION
THORIUM FLUORIDES
URANIUM FLUORIDES
ZIRCONIUM FLUORIDES
FLUORIDES
LEACHING
LIQUIDS
SILICATES
STABILITY
ACTINIDE COMPOUNDS
CHEMICAL REACTIONS
DISSOLUTION
FLUIDS
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SILICON COMPOUNDS
THORIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
URANIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
360205* - Ceramics
Cermets
& Refractories- Corrosion & Erosion