Formation of Color Centers and Concentration of Defects in Boron Carbide Irradiated at Low Gamma Radiation Doses

Mirzayev, M. N.; Mehdiyeva, R. N.; Melikova, S. Z.; Jabarov, S. H.; Thabethe, Thabsile Theodora; Biira, Saphina; Kurbanov, M. A.; Tiep, Nguyen Van

doi:10.3938/jkps.74.363

Cited by 35 publications

(4 citation statements)

References 22 publications

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“…Such extreme conditions may arise from exposure to radiation, variations in temperature or changes in pressure. Radiation, for instance, can lead to the formation of defects in crystals (Yan et al, 2009), altering their electronic and mechanical properties (Mirzayev et al, 2019) or even cause amorphisation and gain new thermodynamic properties (Mirzayev, 2020), where the crystalline structure is lost, leading to further changes in material properties. The study of these effects is critical for the development of new materials with tailored properties and for understanding the behavior of materials in high-stress environments, such as in nuclear reactors or in outer space.…”

Section: Introductionmentioning

confidence: 99%

VIBRATIONAL AND X-RAY MEASUREMENTS OF La2Ti2O7 UNDER HIGH PRESSURE CONDITION

Asadov

2024

APR

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The present study focuses on investigating the impact of high-pressure conditions on the crystal structure and vibration spectra of the perovskite-like layered compound La2Ti2O7. To this end, X-ray diffraction and Raman spectroscopy techniques were employed to observe the behavior of the compound under pressure levels up to 30 GPa. The neutron diffraction at ambient pressure confirms that the structure of La2Ti2O7 is monoclinic P21. The results indicate that when the pressure attains 17.3 GPa, the original monoclinic phase of P21 symmetry undergoes a phase transition to the monoclinic phase of P2 symmetry. The observed pressure-induced phase transitions in La2Ti2O7 are associated with anomalous changes in both the unit cell parameters and the vibrational modes. Additionally, the study obtained the baric dependences of lattice parameters, unit cell volume and vibration frequencies, which were used to calculate the bulk modules for the initial and pressure-induced phases of La2Ti2O7.

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Section: Introductionmentioning

confidence: 99%

VIBRATIONAL AND X-RAY MEASUREMENTS OF La2Ti2O7 UNDER HIGH PRESSURE CONDITION

Asadov

2024

APR

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“…Rani et al [15] examined the effect of γ-rays on the structural and thermal properties of hydroxyl compounds. Mirzayev et al [16][17][18] investigated the correlation between irradiation dose and surface properties of compounds from various aspects, such as the formation of color centers and the concentration of defects in boron carbide, radiation absorption dose of silicide hexoboride and the thermally stable temperature range for unirradiated and irradiated compound. However, the irradiation doses used in these studies were extremely limited.…”

Section: Introductionmentioning

confidence: 99%

Modification of surface characteristics of ophthalmic biomaterial-polymethyl methacrylate induced by cobalt 60 gamma irradiation

Qin,

Guo,

Liang

et al. 2023

PLoS ONE

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This study aims to observe the accelerated aging effect of 60Co gamma (γ) irradiation on poly (methyl methacrylate) (PMMA) under extreme conditions and determine the influence of different media states on aging. PMMA samples were prepared at room temperature under varying media conditions, including air and deionized water immersion. Then, the samples were irradiated with different doses (50, 250, 500, and 1000 KGy) of 60Co γ-rays. The compositional changes of the PMMA samples exposed to the rays at different periods were determined via Fourier transform infrared spectroscopy. The light transmission of the samples was characterized through ultraviolet–visible spectrophotometry, and the surface wettability of the samples was assessed via water contact angle measurements. Surface and microscopic changes in material morphology were analyzed using optical microscopy, ImageJ software, and scanning electron microscopy. Relative molecular mass and glass transition temperature were analyzed via gel permeation chromatography and differential scanning calorimetry. Thus, a comprehensive analysis of the effect of 60Co γ irradiation on the aging properties of PMMA was performed.

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Section: Introductionmentioning

confidence: 99%

“…[34] It has been determined during the previous researches that it is possible to research the structural changes happened in the solid solutions because of effect of the radiation. [35][36][37][38][39][40] The DTA and thermogravimetric analysis (TGA) of such substituted hexaferrites have stated that the mass and heat flow change is happened in depending from sample temperature during the ferromagnetic-paramagnet phase transition. [41][42][43] So, in this paper, the structure, surface morphology, chemical content, and thermal and magnetic features for the substituted hexaferrite with composition BaFe 11.9 In 0.1 O 19 being in powder form have been researched complexly in this work.…”

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confidence: 99%

Crystal Structure, Magnetic Properties and Thermal Behavior of BaFe_11.9In_0.1O₁₉ Ferrite

Agayev

Труханов

Trukhanov

et al. 2022

Physica Status Solidi (b)

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Herein, the crystal structure, surface morphology, and magnetic and thermal properties of the BaFe11.9In0.1O19‐substituted M‐type hexaferrite are investigated. This solid solution is fabricated using “two‐step” topotactic reactions. It is determined through the X‐ray diffraction method that the crystal structure of this solid solution under normal conditions has hexagonal symmetry with P63/mmc space group (No. 194) with the unit cell parameters a = 5.8992(1) Å and c = 23.2275(7) Å. It is determined by the scanning electron microscope (SEM) researches that the average size of the grains is true d ¯ = 6 μm. It is determined by the vibration magnetometry that the ferrimagnet–paramagnet phase transition happens at around T C = 420 °C. Using differential scanning calorimetry (DSC), it is found that air and water molecules leave the sample surface up to 420 °C and the resulting oxygen anions appearing as a result of a solvothermal reaction fill the oxygen vacancies in the crystal structure at high temperatures up to 800 °C. The thermal transitions repeated in the high temperatures are established. The oxidation behavior of this compound is determined from thermogravimetric analysis (TGA) in a wide temperature range.

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Formation of Color Centers and Concentration of Defects in Boron Carbide Irradiated at Low Gamma Radiation Doses

Cited by 35 publications

References 22 publications

VIBRATIONAL AND X-RAY MEASUREMENTS OF La2Ti2O7 UNDER HIGH PRESSURE CONDITION

VIBRATIONAL AND X-RAY MEASUREMENTS OF La2Ti2O7 UNDER HIGH PRESSURE CONDITION

Modification of surface characteristics of ophthalmic biomaterial-polymethyl methacrylate induced by cobalt 60 gamma irradiation

Crystal Structure, Magnetic Properties and Thermal Behavior of BaFe_11.9In_0.1O₁₉ Ferrite

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Formation of Color Centers and Concentration of Defects in Boron Carbide Irradiated at Low Gamma Radiation Doses

Cited by 35 publications

References 22 publications

VIBRATIONAL AND X-RAY MEASUREMENTS OF La2Ti2O7 UNDER HIGH PRESSURE CONDITION

VIBRATIONAL AND X-RAY MEASUREMENTS OF La2Ti2O7 UNDER HIGH PRESSURE CONDITION

Modification of surface characteristics of ophthalmic biomaterial-polymethyl methacrylate induced by cobalt 60 gamma irradiation

Crystal Structure, Magnetic Properties and Thermal Behavior of BaFe11.9In0.1O19 Ferrite

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Crystal Structure, Magnetic Properties and Thermal Behavior of BaFe_11.9In_0.1O₁₉ Ferrite