Suriñach-Illeková curve fitting procedure

R1, R2 and R3 crystallization steps in Fe₇₆ Mo₈Cu₁ B₁₅ ribbon,

full lines –DSC continuous heating data,

dashed lines – theoretical curves for GG-like kinetics (m₁ = 1.5 and m₂ = 2) and JMA kinetics (m₃ = 2.5)

R2 crystallization step in Fe₇₃Si₁₅B₁₀ ribbon, both isothermal and continuous heating data, the JMA kinetics (n = 3)

Theoretical curves

Procedure:

Integral-differential method.

Both dynamic or isothermal measuring regimes.

One measurement at the desired heating rate w⁺ or annealing temperature T_a is sufficient.

Then the Suriñach plot (Suriñach representation) of the measured data fits the theoretical curve representing the true kinetic equation.

Suriñach representation of the measured data:

ln[y(t)]_Ta + ΔE^*/[RT_a] versus –ln[1 – α_Ta(t)]                      (the isothermal measuring regime).               

ln[y(T,t)] + ΔE^*/[RT(t)] + lnw⁺ versus –ln[1 – α(T,t)]  (the continuous heating regime).

In the case of isothermal measurements at various temperatures, T_a, also ΔE^* can be determined.

In the case of any continuous heating measurement, ΔE^* must be predetermined (by e.g. the Kissinger method).

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