TY - JOUR
T1 - Direct evidence that an apparent splitting pattern of γ′ particles in Ni alloys is a stage of coalescence
AU - Calderon, H. A.
AU - Cabanas-Moreno, J. G.
AU - Mori, T.
PY - 2000/10
Y1 - 2000/10
N2 - High-resolution electron microscopy is used to determine the translation order domains of γ′ particles in arrangements formed during Ostwald ripening in the alloy Ni-12 at.% Al. Such arrangements have been often identified with the operation of a mechanism of particle splitting in the late stages of the coarsening process, that is when the elastic strain contribution becomes predominant. It is shown that the translation order domains are not identical in such a particle array. This leads to the conclusion that particle splitting is not necessarily the mechanism responsible for the formation of such characteristic particle arrangements. Instead, particle migration can also be considered to be the responsible mechanism for the formation of such a correlated γ′-particle spatial distribution observed in Ni-based alloys.
AB - High-resolution electron microscopy is used to determine the translation order domains of γ′ particles in arrangements formed during Ostwald ripening in the alloy Ni-12 at.% Al. Such arrangements have been often identified with the operation of a mechanism of particle splitting in the late stages of the coarsening process, that is when the elastic strain contribution becomes predominant. It is shown that the translation order domains are not identical in such a particle array. This leads to the conclusion that particle splitting is not necessarily the mechanism responsible for the formation of such characteristic particle arrangements. Instead, particle migration can also be considered to be the responsible mechanism for the formation of such a correlated γ′-particle spatial distribution observed in Ni-based alloys.
UR - http://www.scopus.com/inward/record.url?scp=0034308521&partnerID=8YFLogxK
U2 - 10.1080/09500830050143769
DO - 10.1080/09500830050143769
M3 - Artículo
SN - 0950-0839
VL - 80
SP - 669
EP - 674
JO - Philosophical Magazine Letters
JF - Philosophical Magazine Letters
IS - 10
ER -