Thermodynamics of the Al(3)Ni phase and revision of the Al-Ni system
Result description
The heat capacity of the Al(3)Ni phase had been measured for the first time, by means of relaxation method over the low temperature range 2-323 K and by measuring heat content increments using drop calorimetry over the higher temperature range of 583-1073 K. The Debye function was employed to fit the low-temperature heat capacities, and from the function, the absolute entropy was evaluated, S degrees(298) = 25.4 J/mol-atoms K. A three-term polynomial representation, a + b.T + c.T(-2), was used for describing heat capacity above 298.15 K. The Gibbs energy function of the Al(3)Ni phase was derived with a fixed reference state by incorporating the polynomial expression of the heat capacity, the recently reported enthalpy of formation and the related phaseequilibria in the Al-Ni system. A revised thermodynamic description of the entire Al-Ni system together with the calculated phase diagram is also presented.
Keywords
The result's identifiers
Result code in IS VaVaI
Result on the web
http://www.sciencedirect.com/science/article/pii/S0040603110003709
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Thermodynamics of the Al(3)Ni phase and revision of the Al-Ni system
Original language description
The heat capacity of the Al(3)Ni phase had been measured for the first time, by means of relaxation method over the low temperature range 2-323 K and by measuring heat content increments using drop calorimetry over the higher temperature range of 583-1073 K. The Debye function was employed to fit the low-temperature heat capacities, and from the function, the absolute entropy was evaluated, S degrees(298) = 25.4 J/mol-atoms K. A three-term polynomial representation, a + b.T + c.T(-2), was used for describing heat capacity above 298.15 K. The Gibbs energy function of the Al(3)Ni phase was derived with a fixed reference state by incorporating the polynomial expression of the heat capacity, the recently reported enthalpy of formation and the related phaseequilibria in the Al-Ni system. A revised thermodynamic description of the entire Al-Ni system together with the calculated phase diagram is also presented.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
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Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Thermochimica Acta
ISSN
0040-6031
e-ISSN
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Volume of the periodical
512
Issue of the periodical within the volume
1
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
7
Pages from-to
189-195
UT code for WoS article
000286863600030
EID of the result in the Scopus database
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Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
BM - Solid-state physics and magnetism
Year of implementation
2011