Record number :
1000626
Title of article :
HRTEM study on grain boundary atomic structures related to the sliding behavior in alumina bicrystals
Author/Authors :
K. Matsunaga، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Pages :
5
From page :
75
To page :
79
Abstract :
Al2O3 bicrystals containing [0 0 0 1] symmetric tilt S7 grain boundaries with different grain boundary planes of {4 ¯5 1 0} and {2 ¯3 1 0} were fabricated by diffusion bonding, and the grain boundary structures were investigated by high-resolution transmission electron microscopy (HRTEM). From HRTEM observations combined with atomistic simulations, it was found that the grain boundaries exhibited characteristic atomic arrangements, and the S7/{2 ¯3 1 0} boundary contained large open spaces at its core. In compressive creep experiments for the bicrystals, these boundaries showed quite different creep behavior, although they have the same S value. The measured sliding rate of S7/{2 ¯3 1 0} was much larger than that of S7/{4 ¯5 1 0}, which may be due to the open core structure formed in S7/{2 ¯3 1 0}.
Keywords :
HRTEM , Grain boundary , alumina , Creep
Journal title :
Applied Surface Science
Journal title :
Applied Surface Science
Serial Year :
2005
Link To Document :
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