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

Radiguet, B and Blavette, D and Wanderka, N and Banhart, J and Sahoo, K L (2008) Segregation-controlled nanocrystallization in an Al–Ni–La metallic glass. Applied Physics Letters, 92 . 103126-1-103126-3.

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The early stages of devitrification of Al89Ni6La5 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 -Al clusters with a number density up to 51023 m−3 nucleate and grow to nonspherical, 12 nm large crystals. -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 -Al nanocrystals. © 2008 American Institute of Physics. DOI: 10.1063/1.2897303

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:Al89Ni6La5 metallic glass; Aluminum-based glasses
Divisions:Metal Extraction and Forming
ID Code:4588
Deposited By:Dr. A K Sahu
Deposited On:11 Jan 2012 10:03
Last Modified:11 Jan 2012 10:03
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