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A Chemical Interpretation of Static Fatigue
Author(s) -
WIEDERHORN S. M.
Publication year - 1972
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1972.tb11215.x
Subject(s) - slurry , chemical composition , mineralogy , ion , chemistry , composition (language) , materials science , composite material , organic chemistry , linguistics , philosophy
The effect of water on the growth of cracks in glass is discussed. Crack motion is believed to result from a stress‐enhanced chemical reaction between water and glass and is influenced strongly by the crack‐tip OH − ion concentration. This hypothesis is supported by the observation that crack‐velocity data can be correlated with measurements of pH in slurries of ground glass and water. Variation of the measured pH from 5 to 12, depending on glass composition, suggests a wide pH variation at crack tips. The types of chemical reactions that establish the slurry pH are discussed, and it is noted that the slurries behave as weak acids, buffered solutions, or salts of weak acids, depending on glass composition.