TY - JOUR
T1 - Evidence for vacancy mechanism in grain boundary diffusion in bcc iron
T2 - A molecular-dynamics study
AU - Kwok, Thomas
AU - Ho, P. S.
AU - Yip, Sidney
AU - Balluffi, R. W.
AU - Bristowe, P. D.
AU - Brokman, A.
PY - 1981
Y1 - 1981
N2 - The dominance of vacancy migration in grain boundary self-diffusion has been established by molecular-dynamics simulation of a bcc iron =5 tilt boundary. The data yielded a reasonable value of the activation energy for migration and showed that the jump processes are highly structure dependent. The use of a temperature-dependent transition-probability matrix to describe the diffusion of the vacancies in the grain boundary is suggested. Formation of one type of boundary interstitial was observed, and the interstitial was found to be immobile during its lifetime.
AB - The dominance of vacancy migration in grain boundary self-diffusion has been established by molecular-dynamics simulation of a bcc iron =5 tilt boundary. The data yielded a reasonable value of the activation energy for migration and showed that the jump processes are highly structure dependent. The use of a temperature-dependent transition-probability matrix to describe the diffusion of the vacancies in the grain boundary is suggested. Formation of one type of boundary interstitial was observed, and the interstitial was found to be immobile during its lifetime.
UR - http://www.scopus.com/inward/record.url?scp=4244163799&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.47.1148
DO - 10.1103/PhysRevLett.47.1148
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AN - SCOPUS:4244163799
SN - 0031-9007
VL - 47
SP - 1148
EP - 1151
JO - Physical Review Letters
JF - Physical Review Letters
IS - 16
ER -