Premium
Kinetics of Growth of Al 2 O 3 Whiskers
Author(s) -
MINAGAWA SHIGEKAZU
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.tb11214.x
Subject(s) - whiskers , activation energy , kinetics , whisker , dissociation (chemistry) , reaction rate constant , chemistry , kinetic energy , dissociation rate , materials science , thermodynamics , analytical chemistry (journal) , organic chemistry , physics , composite material , quantum mechanics
The kinetics of the growth of Al 2 O 3 whiskers by the reaction of Al with a trace amount of H 2 O in an H 2 atmosphere were studied. The activation energy in the region of constant growth rate was ∼77 kcal mol −1 . This activation energy value, in the light of thermodynamic calculations and other theoretical considerations, suggests that the rate‐determining step in the growth of these whiskers is the dissociation of H 2 O molecules on the surface of Al 2 O 3 .