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Effect of Alcohols on Crack Propagation in Glass
Author(s) -
FREIMAN S. W.
Publication year - 1974
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.1151-2916.1974.tb10920.x
Subject(s) - fracture mechanics , materials science , relative humidity , composite material , chain (unit) , alcohol , intensity (physics) , stress intensity factor , chemistry , thermodynamics , organic chemistry , optics , physics , astronomy
The effect of straight‐chain alcohols having chain lengths of 6 to 12 carbon atoms on crack propagation in glasses was studied. The test was a modification of the double‐cantilever‐beam technique. Plots of crack velocity vs stress intensity factor, K , were trimodal, similar to those for glass tested in N 2 gas of varying relative humidity. Crack velocities in the two regions of lowest K could be explained using a model derived by Wiederhorn for the effect of water on crack propagation and were independent of alcohol chain length. The chain length of the alcohol affected the results only in the water‐independent high‐ K region, where crack velocity increased monotonically with decreasing chain length at a given K. There was no systematic effect of glass composition within the Na 2 O‐CaO‐SiO 2 system, but crack velocities at a given K in a 3BaO‐5SiO 2 glass were higher under all conditions than those in Na 2 O‐CaO‐SiO 2 glasses.