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|Title:||Crystallization kinetics of Fe78B13Si9 metallic glass before and after high-energy heavy ion irradiation|
Saxena, N S
|Abstract:||Crystallization kinetics or virgin and irradiated (at three different fluences with high energy heavy ion; Ni11 + or (150 MeV ) specimens of Fe78B13Si9 glass has been studied using Differential Scanning Calorimetry (DSC) under non-isothermal condition. Only one set or geometry has been used for irradiation at different fluences. It has been found that, the crystallization process is completed in two phases. The DSC data have been analyzed in terms or kinetic parameter, viz. activation energy (Ec), Avrami exponent (n), dimensionality or growth (m ) and frequency factor (K0) using two different theoretical models. The lower activation energy in case or second crystallization occurring at higher temperature indicates the easier nucleation of second phase, which is termed Fe2B bet phase. The abnormally high value of Avrami exponent indicates very high nucleation rate during second crystallization.|
|ISSN:||0975-1041 (Online); 0019-5596 (Print)|
|Appears in Collections:||IJPAP Vol.41(03) [March 2003]|
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