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|Title:||Correlations between the glass transition, crystallization, apparent activation energy and glass forming ability in Fe based amorphous alloys|
|Authors:||Yao, B. |
|Citation:||Yao, B., Ma, H., Tan, H., Zhang, Y., Li, Y. (2003-11-19). Correlations between the glass transition, crystallization, apparent activation energy and glass forming ability in Fe based amorphous alloys. Journal of Physics Condensed Matter 15 (45) : 7617-7623. ScholarBank@NUS Repository. https://doi.org/10.1088/0953-8984/15/45/001|
|Abstract:||The glass transition, crystallization, apparent activation energy and glass forming ability (GFA) of a metallic glass as well as their correlations were studied in amorphous alloys of composition Fe91-xB xZr5Nb4(FBZN, 5 ≤ x ≤ 30 at.%) and Fe61-xCoxZr5B30Nb4 (FCZBN, 0 ≤ x ≤ 15 at.%). It was found that the glass transition temperature Tg and the crystallization temperature Tx can be related by a formula, Tx = αTg + β, for each amorphous alloy in the two systems, α and β are constants for a given amorphous alloy, obtained by making measurements using non-isothermal scanning at various heating rates in a differential scanning calorimeter and then applying Lasocka's equation. The apparent activation energy of the glass transition Eg was observed to be directly proportional to α and have a correlation, Eg = 3.527(Tx - β)/T g +1.09, with Tx and Tg. The supercooled liquid region ΔTx, which is used for characterization of the GFA, is related to Eg and Tg by the formula ΔT x = (Eg/3.527-1.309)Tg+β.|
|Source Title:||Journal of Physics Condensed Matter|
|Appears in Collections:||Staff Publications|
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