The effect of heating and cooling rates on the DSC (differential scanning calorimetry) heat flux peak of the monoclinic-tetragonal transition of zirconia was investigated in the 0.4-20 degrees C/min scan rate range. While the peak position, shape and area at high to moderate scan rates are consistent with existing literature data, a 'step change' (i.e., a peak-less baseline shift) was observed for the extremely slow heating rate of 0.4 degrees C/min. As expected, peak profiles in the heating and cooling transitions are markedly different, the peak shape being strongly asymmetrical for the t -> m transition, but very closely symmetrical for the m -> t transition. As the cooling rate is lowered, the t -> m peak is increasingly splitted into multiple components, whose individual properties have been fitted using Gamma distribution functions. (C) 2011 Elsevier B.V. All rights reserved.

Low scan rate DSC study of the monoclinic-tetragonal transition in zirconia / D., Lega; A., Antonini; Ciccioli, Andrea; S., Brutti; P., Lenzuni. - In: THERMOCHIMICA ACTA. - ISSN 0040-6031. - STAMPA. - 524:1-2(2011), pp. 18-22. [10.1016/j.tca.2011.06.004]

Low scan rate DSC study of the monoclinic-tetragonal transition in zirconia

CICCIOLI, Andrea;S. Brutti;
2011

Abstract

The effect of heating and cooling rates on the DSC (differential scanning calorimetry) heat flux peak of the monoclinic-tetragonal transition of zirconia was investigated in the 0.4-20 degrees C/min scan rate range. While the peak position, shape and area at high to moderate scan rates are consistent with existing literature data, a 'step change' (i.e., a peak-less baseline shift) was observed for the extremely slow heating rate of 0.4 degrees C/min. As expected, peak profiles in the heating and cooling transitions are markedly different, the peak shape being strongly asymmetrical for the t -> m transition, but very closely symmetrical for the m -> t transition. As the cooling rate is lowered, the t -> m peak is increasingly splitted into multiple components, whose individual properties have been fitted using Gamma distribution functions. (C) 2011 Elsevier B.V. All rights reserved.
2011
differential scanning calorimetry; low heating rate; phase transformations; zirconia
01 Pubblicazione su rivista::01a Articolo in rivista
Low scan rate DSC study of the monoclinic-tetragonal transition in zirconia / D., Lega; A., Antonini; Ciccioli, Andrea; S., Brutti; P., Lenzuni. - In: THERMOCHIMICA ACTA. - ISSN 0040-6031. - STAMPA. - 524:1-2(2011), pp. 18-22. [10.1016/j.tca.2011.06.004]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/385257
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