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Environmentally Enhanced Fracture of Gallium Arsenide
Author(s) -
White Grady S.,
Freiman Stephen W.,
Wilson Anne M.
Publication year - 1989
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.1151-2916.1989.tb06058.x
Subject(s) - polarizability , formamide , arsenide , materials science , dielectric , heptane , ammonia , chemical physics , molecule , impurity , gallium arsenide , methanol , composite material , inorganic chemistry , chemistry , organic chemistry , optoelectronics
GaAs has been found to undergo environmentally enhanced crack growth in water, formamide, acetonitrile, and methanol. In contrast, no crack extension whatsoever was observed in ammonia gas, N 2 gas at 50% relative humidity, or heptane. These results are consistent with a model of electrostatic, rather then chemical, interaction between the environment and the crack‐tip bonds, governing the rate of crack growth. The lack of any water‐impurity‐controlled crack growth further suggests that it is the dielectric constant of the liquid medium rather than the polarizability of an individual molecule that is important.