Positron annihilation study of structural relaxation and crystallization in cobalt based metallic glass.

Ravindrachary, V. and Sreepad, H. R. and Chandrashekara, A. and Ranganathaiah, C. and Gopal, S. (1992) Positron annihilation study of structural relaxation and crystallization in cobalt based metallic glass. Materials Science Forum, 105-11 (Positr). pp. 1201-4. ISSN 0255-5476

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Official URL: http://dx.doi.org/10.4028/www.scientific.net/MSF.1...

Abstract

Positron lifetime measurements are made in the as-quenched state as well as in isochronal annealing cycle of the metallic glass Co70(Si+B)23Mn5(Fe+Mo)2. The variation of positron lifetime as a function of annealing temp. indicates the stages corresponding to structural relaxation and crystn. The behavior of the lifetime is explained by invoking the Egami model (1980) of structural relaxation and the influence of the Mo atoms on the crystn. kinetics. The increase of positron lifetime in the final stages can be explained as due to the trapping of positrons at the boundary-like regions between the short-range ordered at. clusters and amorphous matrix. [on SciFinder(R)]

Item Type: Article
Additional Information: Unmapped bibliographic data: PY - 1992/// [EPrints field already has value set] M3 - 10.4028/www.scientific.net/MSF.105-110.1201 [Field not mapped to EPrints] JA - Mater. Sci. Forum [Field not mapped to EPrints]
Uncontrolled Keywords: cobalt alloy metallic glass crystn, positron annihilation metallic glass crystn
Subjects: Physical Sciences > Physics
Divisions: PG Campuses > Manasagangotri, Mysore > Physics
Depositing User: Praveen Kumari B.L
Date Deposited: 22 May 2013 10:40
Last Modified: 22 May 2013 10:40
URI: http://eprints.uni-mysore.ac.in/id/eprint/10170

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