Effect of high intense electron beam irradiation on structural and Raman properties of boron carbide micro powder

Mirzayev, M. N.; Abdurakhimov, B. A.; Jabarov, S. H.; Tashmetov, M. Yu.; Demir, E.; Tiep, Nguyen Van; Ismayilova, N. A.; Alıyev, Y. I.; Popov, Evgeni; Mirzayeva, D. M.; Karaaslan, İpek Ş.; Георгиев, Георги Николов

doi:10.1142/s0217979220500083

Cited by 23 publications

(6 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The difference may arise from the fact that the experimental B 13 C 2 sample is mixed with various arrangements of icosahedra and chains . Particularly, previous studies showed a possible configuration (B 11 C)C–B–B, resulting in symmetry breaking. , Tallant et al also mentioned that boron-rich boron carbide is formed by replacing CBC chains with CBB chains. To confirm this, they investigated the effect of varying carbon content in boron carbide using Raman spectroscopy .…”

Section: Resultsmentioning

confidence: 99%

“…In addition to B 4 C, the vibrational spectra of other boron-rich icosahedral superhard materials have been examined experimentally and theoretically. ,,− Measuring Raman spectra of boron carbides with the carbon content of ∼20 to ∼8 atom % is helpful in understanding the substitutional or chemical disorder that characterizes these structurally ordered solids. ,, These measurements demonstrate that the boron carbide composition with carbon content close to 20 atom % consists of B 11 C p icosahedra linked by C–B–C chains. As the carbon content decreases to about 13 atom %, C–B–B chains gradually replace C–B–C chains.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Raman Spectroscopy Signatures of Boron-Rich Superhard Materials from Density Functional Theory

Shen

Tang

et al. 2023

J. Phys. Chem. C

View full text Add to dashboard Cite

Boron-rich superhard materials have complex structural and chemical variations, making it challenging to determine their atomic structures precisely from experiments. Here, we employ first-principles calculation to examine Raman spectra of four boron-rich icosahedral crystals: boron carbide (B 4 C), boron-rich boron carbide (B 13 C 2 ), boron suboxide (B 6 O), and boron subphosphide (B 12 P 2 ). We find qualitative agreements in Raman peak locations between the calculated Raman spectra and the experimental measurements. Furthermore, vibrations of the icosahedra or chains, occurring in all the spectra, are interpreted by performing vibration mode analyses. Our results indicate that the vibrations of the two-atom chain are responsible for the low-frequency region of B 6 O and B 12 P 2 . In contrast, both low-frequency and high-frequency regions are partially related to the vibration of chain atoms for B 4 C and B 13 C 2 . Besides, the icosahedral vibration modes are attributed to the high-frequency region of all these four crystals. More importantly, the peak positions of Raman spectra can be used to identify the various icosahedral structure with different B/C ratios and various chain structures, making Raman spectroscopy an important tool to monitor the processing of newly developed icosahedral materials with enhanced physical properties. This study not only provides a deeper understanding of the atomic structures of boron-rich superhard materials from the perspective of Raman spectroscopy but also helps to interpret the experimental Raman spectra.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Raman Spectroscopy Signatures of Boron-Rich Superhard Materials from Density Functional Theory

Shen

Tang

et al. 2023

J. Phys. Chem. C

View full text Add to dashboard Cite

show abstract

“…On the other hand, it is possible to transition from the thermal flux function to thermal conductivity, thermal diffusion, heat capacity and thermodynamic parameters. The transition from the thermal flux functions to the thermal conductivity and the temperature dependence of the heat capacity allow explaining the mechanism of the change of the thermodynamic functions [16]. Fig.…”

Section: Thermal Analysismentioning

confidence: 99%

X-ray diffraction and differential scanning calorimetry analysis of CuInZnSe-=SUB=-3-=/SUB=-

et al. 2022

View full text Add to dashboard Cite

The compound CuInZnSe3 was synthesized, the crystal structure was investigated by X-ray diffraction and thermal properties was investigated by differential scanning calorimetry analysis. It was found that, under normal conditions, the crystal structure of this compound corresponds to cubic symmetry with the space group F-43m (216). The temperature dependence is obtained at a constant rate of heat treatment of the heat flow in the temperature range T=30-900oC. The observed endothermic effects at T=43, 600 and 756oC are explained by the resonance of thermal vibrations of atoms in the crystal structure of the CuInZnSe3 compound and the release of relatively weakly bound atoms. Keywords: X-ray diffraction, semiconductors, chalcogenides.

show abstract

“…С другой стороны, можно перейти от функции теплового потока к теплопроводности, термодиффузии, теплоемкости и термодинамическим параметрам. Переход от функции теплового потока к теплоемкости и температурная зависимость теплоемкости позволяют объяснить механизм изменения термодинамических функций [16]. На рис.…”

Section: термический анализunclassified

Рентгеноструктурный и дифференциальный сканирующий калориметрический анализ CuInZnSe-=SUB=-3-=/SUB=-

Ибрагимова¹,

Джабаров²,

Гусейнов³

et al. 2021

Физика И Техника Полупроводников

View full text Add to dashboard Cite

Синтезировано соединение CuInZnSe3, исследованы кристаллическая структура методом рентгеновских дифракций и термические свойства методом дифференциального сканирующего калориметрического анализа. Обнаружено, что в нормальных условиях кристаллическая структура этого соединения соответствует кубической симметрии с пространственной группой F-43m (216). При постоянной скорости термообработки получена температурная зависимость функции теплового потока в интервале температур T=30-900oC. Наблюдаемые эндоэффекты при T=430, 600 и 756oC объяснены резонансом тепловых колебаний атомов в кристаллической структуре соединения CuInZnSe3 и высвобождением относительно слабосвязанных атомов. Ключевые слова: рентгеновская дифракция, полупроводники, халькогениды.

show abstract

Effect of high intense electron beam irradiation on structural and Raman properties of boron carbide micro powder

Cited by 23 publications

References 36 publications

Raman Spectroscopy Signatures of Boron-Rich Superhard Materials from Density Functional Theory

Raman Spectroscopy Signatures of Boron-Rich Superhard Materials from Density Functional Theory

X-ray diffraction and differential scanning calorimetry analysis of CuInZnSe-=SUB=-3-=/SUB=-

Рентгеноструктурный и дифференциальный сканирующий калориметрический анализ CuInZnSe-=SUB=-3-=/SUB=-

Contact Info

Product

Resources

About