TDPAC and XRPD measurements of the polycrystalline Hf2Ni phase
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Autori
Cekić, Božidar Đ.Koicki, S.
Umićević, Ana
Belošević-Čavor, Jelena
Koteski, Vasil J.
Ivanovski, Valentin N.
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The high-resolution time-differential perturbed angular correlation technique (TDPAC) has been used to study the electric field gradient at Ta-181 impurities in the polycrystalline intermetallic compound Hf2Ni in the wide temeperature range 78-1314 K. The single-phase BCT CuAl2 (C16)-type structure of the compound was confirmed by X-ray diffractogram, with lattice constants found to be a = 6.479(3) angstrom and c = 5.271(3) angstrom at room temperature. The coincidence measurements between gamma rays in the cascade were recorded with a time resolution better than 0.75 ns for the 133-482 keV y-y cascade of Ta-181 nuclei. The results of measurements reveal the presence of a single nuclear quadrupole interaction (NQI) WO and its linear dependence with temperature in the range 78-1134 K. In the high temperature region (1134-1314 K) the significant appearance of disordering in the lattice structure of Hf2Ni was revealed, in the vicinity of the melting point of 1473 K. The XRPD measurements ...in the high temperature range can help in better interpretation and understanding of this complex structural and microdinamic behavior of the Hf2Ni phase.
Ključne reči:
time-differential perturbed angular correlation / X-ray diffraction / intermetallic / Hf2NiIzvor:
Journal of Optoelectronics and Advanced Materials, 2008, 10, 4, 794-797Napomena:
- 5th International Conference on New Research Trends in Materials Science, Sep, 2007, Sibiu, Romania
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VinčaTY - JOUR AU - Cekić, Božidar Đ. AU - Koicki, S. AU - Umićević, Ana AU - Belošević-Čavor, Jelena AU - Koteski, Vasil J. AU - Ivanovski, Valentin N. PY - 2008 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6747 AB - The high-resolution time-differential perturbed angular correlation technique (TDPAC) has been used to study the electric field gradient at Ta-181 impurities in the polycrystalline intermetallic compound Hf2Ni in the wide temeperature range 78-1314 K. The single-phase BCT CuAl2 (C16)-type structure of the compound was confirmed by X-ray diffractogram, with lattice constants found to be a = 6.479(3) angstrom and c = 5.271(3) angstrom at room temperature. The coincidence measurements between gamma rays in the cascade were recorded with a time resolution better than 0.75 ns for the 133-482 keV y-y cascade of Ta-181 nuclei. The results of measurements reveal the presence of a single nuclear quadrupole interaction (NQI) WO and its linear dependence with temperature in the range 78-1134 K. In the high temperature region (1134-1314 K) the significant appearance of disordering in the lattice structure of Hf2Ni was revealed, in the vicinity of the melting point of 1473 K. The XRPD measurements in the high temperature range can help in better interpretation and understanding of this complex structural and microdinamic behavior of the Hf2Ni phase. T2 - Journal of Optoelectronics and Advanced Materials T1 - TDPAC and XRPD measurements of the polycrystalline Hf2Ni phase VL - 10 IS - 4 SP - 794 EP - 797 UR - https://hdl.handle.net/21.15107/rcub_vinar_6747 ER -
@article{ author = "Cekić, Božidar Đ. and Koicki, S. and Umićević, Ana and Belošević-Čavor, Jelena and Koteski, Vasil J. and Ivanovski, Valentin N.", year = "2008", abstract = "The high-resolution time-differential perturbed angular correlation technique (TDPAC) has been used to study the electric field gradient at Ta-181 impurities in the polycrystalline intermetallic compound Hf2Ni in the wide temeperature range 78-1314 K. The single-phase BCT CuAl2 (C16)-type structure of the compound was confirmed by X-ray diffractogram, with lattice constants found to be a = 6.479(3) angstrom and c = 5.271(3) angstrom at room temperature. The coincidence measurements between gamma rays in the cascade were recorded with a time resolution better than 0.75 ns for the 133-482 keV y-y cascade of Ta-181 nuclei. The results of measurements reveal the presence of a single nuclear quadrupole interaction (NQI) WO and its linear dependence with temperature in the range 78-1134 K. In the high temperature region (1134-1314 K) the significant appearance of disordering in the lattice structure of Hf2Ni was revealed, in the vicinity of the melting point of 1473 K. The XRPD measurements in the high temperature range can help in better interpretation and understanding of this complex structural and microdinamic behavior of the Hf2Ni phase.", journal = "Journal of Optoelectronics and Advanced Materials", title = "TDPAC and XRPD measurements of the polycrystalline Hf2Ni phase", volume = "10", number = "4", pages = "794-797", url = "https://hdl.handle.net/21.15107/rcub_vinar_6747" }
Cekić, B. Đ., Koicki, S., Umićević, A., Belošević-Čavor, J., Koteski, V. J.,& Ivanovski, V. N.. (2008). TDPAC and XRPD measurements of the polycrystalline Hf2Ni phase. in Journal of Optoelectronics and Advanced Materials, 10(4), 794-797. https://hdl.handle.net/21.15107/rcub_vinar_6747
Cekić BĐ, Koicki S, Umićević A, Belošević-Čavor J, Koteski VJ, Ivanovski VN. TDPAC and XRPD measurements of the polycrystalline Hf2Ni phase. in Journal of Optoelectronics and Advanced Materials. 2008;10(4):794-797. https://hdl.handle.net/21.15107/rcub_vinar_6747 .
Cekić, Božidar Đ., Koicki, S., Umićević, Ana, Belošević-Čavor, Jelena, Koteski, Vasil J., Ivanovski, Valentin N., "TDPAC and XRPD measurements of the polycrystalline Hf2Ni phase" in Journal of Optoelectronics and Advanced Materials, 10, no. 4 (2008):794-797, https://hdl.handle.net/21.15107/rcub_vinar_6747 .