Thermal behavior of the Cu–22.55 at.%Al alloy with small Ag additions

In this study the effect of Ag additions on the thermal behavior of the Cu–22.55 at.%Al alloy was studied using electrical resistivity measurements, in situ X-ray diffractometry, differential scanning calorimetry, and optical microscopy. The results indicated that Ag additions do not change the phas...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2011-02, Vol.103 (2), p.459-463
Main Authors: Silva, R. A. G., Adorno, A. T., Magdalena, A. G., Carvalho, T. M., Stipcich, M., Cuniberti, A., Castro, M. L.
Format: Article
Language:English
Subjects:
Alloy systems
Alloying additive
Alloys
Analytical Chemistry
Applied sciences
CALORIMETRY
Chemistry
Chemistry and Materials Science
COOLING RATE
COPPER ALLOYS (40 TO 99.3 CU)
Copper base alloys
Differential scanning calorimetry
Diffraction
Electric properties
ELECTRICAL CONDUCTIVITY
ENTROPY
Exact sciences and technology
Inorganic Chemistry
Measurement Science and Instrumentation
Metals. Metallurgy
Physical Chemistry
Polymer Sciences
Silver
Specialty metals industry
Thermal properties
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Summary:In this study the effect of Ag additions on the thermal behavior of the Cu–22.55 at.%Al alloy was studied using electrical resistivity measurements, in situ X-ray diffractometry, differential scanning calorimetry, and optical microscopy. The results indicated that Ag additions do not change the phase transformations sequence in the studied alloys, but modify its critical temperatures due to a change on entropy of system. It was verified that at the cooling rate of 10 K/min the decomposition of β phase into (α + γ 1 ) is incomplete, but for lower cooling rates than 1.0 K/min this reaction is completed.
ISSN:1388-6150
1588-2926
1572-8943
DOI:10.1007/s10973-010-0908-4