TY - JOUR
T1 - Direct observations of nucleation in a nondilute multicomponent alloy
AU - Sudbrack, Chantal K.
AU - Noebe, Ronald D.
AU - Seidman, David N.
PY - 2006
Y1 - 2006
N2 - The chemical pathways leading to γ′ (L 12) nucleation from nondilute Ni-5.2 Al-14.2 Cr at.%, γ (fcc), at 873 K are followed with radial distribution functions and isoconcentration surface analyses of direct-space atom-probe tomographic images. Although Cr atoms initially are randomly distributed, a distribution of congruent Ni3 Al short-range-order domains (SRO), R ≅0.6 nm, results from Al diffusion during quenching. Domain site occupancy develops as their number density increases leading to Al-rich phase separation by γ′ -nucleation, R =0.75 nm, after SRO occurs.
AB - The chemical pathways leading to γ′ (L 12) nucleation from nondilute Ni-5.2 Al-14.2 Cr at.%, γ (fcc), at 873 K are followed with radial distribution functions and isoconcentration surface analyses of direct-space atom-probe tomographic images. Although Cr atoms initially are randomly distributed, a distribution of congruent Ni3 Al short-range-order domains (SRO), R ≅0.6 nm, results from Al diffusion during quenching. Domain site occupancy develops as their number density increases leading to Al-rich phase separation by γ′ -nucleation, R =0.75 nm, after SRO occurs.
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U2 - 10.1103/PhysRevB.73.212101
DO - 10.1103/PhysRevB.73.212101
M3 - Article
AN - SCOPUS:33744724933
SN - 1098-0121
VL - 73
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 21
M1 - 212101
ER -