1. The study of eutectoid decomposition kinetics of Cu50Zr50 alloy
- Author
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D. A. Yagodin, A. A. Ryltseva, V. V. Filippov, K. Yu. Shunyaev, and S. Kh. Estemirova
- Subjects
010302 applied physics ,Materials science ,Alloy ,Metallurgy ,Chemical process of decomposition ,Thermodynamics ,02 engineering and technology ,engineering.material ,Continuous cooling transformation ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Decomposition ,Isothermal process ,Differential scanning calorimetry ,0103 physical sciences ,engineering ,Dilatometer ,Physical and Theoretical Chemistry ,0210 nano-technology ,Eutectic system - Abstract
The process of the eutectoid decomposition CuZr → Cu10Zr7 + CuZr2 in a Cu50Zr50 alloy under isothermal and non-isothermal conditions was investigated by using differential scanning calorimetry, electrical resistivity, X-ray diffraction, optical microscopy and dilatometer techniques. The continuous cooling transformation and time–temperature transformation diagrams for the decomposition of CuZr were determined over a wide temperature range. It was observed that the decomposition process is extremely slow in comparison with many other copper-based systems. The kinetics of the eutectoid decomposition under isothermal conditions was discussed within the frameworks of the Johnson–Mehl–Avrami theory. Kinetics parameters of eutectoid decomposition, namely the activation energy E a = 395 ± 24 kJ mol−1 and the power n = 3.3 ± 0.1 in Avrami exponent, were determined.
- Published
- 2016
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