The study of eutectoid decomposition kinetics of Cu50Zr50 alloy
| Autor: | D. A. Yagodin, A. A. Ryltseva, V. V. Filippov, K. Yu. Shunyaev, S. Kh. Estemirova |
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| Rok vydání: | 2016 |
| Předmět: |
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 |
| Zdroj: | Journal of Thermal Analysis and Calorimetry. 127:773-778 |
| ISSN: | 1588-2926 1388-6150 |
| DOI: | 10.1007/s10973-016-5530-7 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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