Segregation-controlled nanocrystallization in an Al-Ni-La metallic glass - Archive ouverte HAL Access content directly
Journal Articles Applied Physics Letters Year : 2008

Segregation-controlled nanocrystallization in an Al-Ni-La metallic glass

B. Radiguet
D. Blavette
N. Wanderka
  • Function : Author
J. Banhart
  • Function : Author
K. L. Sahoo
  • Function : Author

Abstract

The early stages of devitrification of Al89 Ni6 La5 metallic glass were investigated using three-dimensional atom probe. Even in the as-quenched amorphous state, nanometer-sized fluctuations of Ni and Al were observed. The Al-rich fluctuations act as nucleation sites for the crystallization at 443 K in which α-Al clusters with a number density up to 5× 1023 m-3 nucleate and grow to nonspherical, 12 nm large crystals. α-Al particles are almost pure in Al and are surrounded by a La-rich shell. It is concluded that La segregation controls the growth and limits the size of the α-Al nanocrystals. \textcopyright 2008 American Institute of Physics.
No file

Dates and versions

hal-01928882 , version 1 (20-11-2018)

Identifiers

Cite

B. Radiguet, D. Blavette, N. Wanderka, J. Banhart, K. L. Sahoo. Segregation-controlled nanocrystallization in an Al-Ni-La metallic glass. Applied Physics Letters, 2008, 92 (10), ⟨10.1063/1.2897303⟩. ⟨hal-01928882⟩
7 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More