Cp(T) -  Specific heat measurements

 

Mean values of specific heat cpM(303K) and cpM(46 8K) in Jg-at-1K-1 of Fe73Co12B15 metallic glassy ribbon:

Method and Temperature

As-quenched

Relaxed

Crystalline

Δcp(as-q-rel)

Δcp(as-q-rel)

Theoretical at 303 K

 

 

22.87

 

 

Measured at 303 K

24.20±0.48
±2.0%

23.90

22.53±0.38
±1.9%

+0.30
+1.2%

+1.67
+6.9%

Measured aat 468 K

26.97±0.61
±2.3%

26.22

25.22±0.41
±1.6%

+0.75
+2.8%

+1.75
+6.5%

 

Materials (sample dimensions Φ<7 mm, d<2 mm, mass as in the case of DSC measurements):
metallic ribbons (Fe-Co-B, Co-Cr-Fe-Si-B, Al-Fe-Nb,...),
metallic bulks (Co, Al, Fe, Nb, Al3Fe,Al3Nb,...),
ceramics, oxides, composites,
polymers (PET,...),
powders (CNT),…

 

Procedure:

Continuous, subtraction, relative, three-step method.

Based on the power-compensation (PE) DSC measurements in the continuous heating regime.

Three measurements (blanc, known reference material and the measured sample material).  Then:

        (y(T) – DSC signal, m – mass of the sample).

 

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