Nano-scale Shell in Phase Separating Gd-Ti-Al-Co Metallic Glass

Title
Nano-scale Shell in Phase Separating Gd-Ti-Al-Co Metallic Glass
Authors
장혜정박은수김도향
Keywords
Metallic glass; Phase separation; Wetting; Shell; TEM
Issue Date
2013-06
Publisher
Applied Microscopy
Citation
VOL 43, NO 2, 98-101
Abstract
In the present study, formation of yard and shell has been investigated in as-melt-spun Gd30Ti25Al25Co20 alloy using a variety of transmission electron microscopy techniques. The phase separation during cooling leads to the formation of the microstructure consisting of amorphous droplets with different size scales embedded in the amorphous matrix. Due to the interdiffusion at the interface after the first-step phase separation, ~50 nm-thick yard develops on the surface of the primary droplet particle. Due to the critical wetting phenomenon, ~5 nm thickness shell enveloping the droplet forms. The sell is enriched in Co and Ti, implying that the composition is close to that of the droplet.
URI
http://pubs.kist.re.kr/handle/201004/45192
ISSN
22875123
Appears in Collections:
KIST Publication > Article
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