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In situ formation of two amorphous phases by liquid phase separation in Y–Ti–Al–Co alloy

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4 Author(s)
Park, B.J. ; Department of Metallurgical Engineering, Yonsei University, Seoul 120-749, Korea ; Chang, H.J. ; Kim, D.H. ; Kim, W.T.

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.1842360 

The Y28Ti28Al24Co20 alloy undergoes metastable liquid phase separation in the under-cooled liquid state and subsequently solidifies into two different Y-rich and Ti-rich amorphous phases. Secondary phase separation occurs due to the supersaturation of the primary separated liquids as the temperature decreases. Depending on the degree of local undercooling, a wide range of length scale of the microstructure is observed. The characteristic length scale of the two amorphous phases is ∼250 nm near the air side of the ribbon, and ∼25 nm near the wheel side of the ribbon.

Published in:

Applied Physics Letters  (Volume:85 ,  Issue: 26 )

Date of Publication:

Dec 2004

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