Determination of Thermodynamic Parameters in the Cu1.95Ni0.05S Phase-Transition Regions
- Авторы: Aliev F.1, Hasanov H.2, Rzaeva A.3, Jafarov M.1, Damirov G.1,4
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Учреждения:
- Institute of Physics
- Heydar Aliev Academy of State Security Service
- Azerbaijan State Pedagogical University
- Sumgait State University
- Выпуск: Том 52, № 1 (2018)
- Страницы: 71-77
- Раздел: Microcrystalline, Nanocrystalline, Porous, and Composite Semiconductors
- URL: https://journals.rcsi.science/1063-7826/article/view/202257
- DOI: https://doi.org/10.1134/S1063782618010037
- ID: 202257
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Аннотация
X-ray diffraction and differential thermal analysis data obtained in the Cu1.95Ni0.05S phase-transition region are analyzed. It is established that the low-temperature rhombic α phase in Cu1.95Ni0.05S transforms to the hexagonal β phase at temperatures of 370–390 K and to the cubic γ phase at temperatures of 740–765 K according to the scheme
\(\alpha \to \mathop {\alpha + \beta }\limits_{370 - 390K} \to \mathop {\alpha + \gamma }\limits_{740 - 765K} \to \gamma \). It is determined (using the temperature dependence of differential thermal analysis) that the transition α → β is accompanied by heat absorption while the transition β → γ is accompanied by heat release. It is found that both transitions are allowed and belong to the reconstructive type. Both transitions are found to occur in a fluctuation volume of ~10–20 cm3 at temperature rates of 0.11 and 0.08 K–1. It is demonstrated that the transition α → γ is accompanied by alternation of the structures passing through the intermediate β phase, which is incommensurate with respect to the α and γ phases.
Об авторах
F. Aliev
Institute of Physics
Автор, ответственный за переписку.
Email: farzali@physics.ab.az
Азербайджан, Baku, AZ-1143
H. Hasanov
Heydar Aliev Academy of State Security Service
Email: farzali@physics.ab.az
Азербайджан, Baku, AZ-1029
A. Rzaeva
Azerbaijan State Pedagogical University
Email: farzali@physics.ab.az
Азербайджан, Baku, AZ-1000
M. Jafarov
Institute of Physics
Email: farzali@physics.ab.az
Азербайджан, Baku, AZ-1143
G. Damirov
Institute of Physics; Sumgait State University
Email: farzali@physics.ab.az
Азербайджан, Baku, AZ-1143; Sumgait, AZ-5008