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Your search keyword '"Rempel, Andrey A."' showing total 171 results
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171 results on '"Rempel, Andrey A."'

2. Lightweight single-phase Al-based complex concentrated alloy with high specific strength

Author

Han, Mingliang, Wu, Yuan, Zong, Xiaobin, Shen, Yaozu, Zhang, Fei, Lou, Hongbo, Dong, Xiao, Zeng, Zhidan, Peng, Xiangyang, Hou, Shuo, Lu, Guangyao, Xiong, Lianghua, Yan, Bingmin, Gou, Huiyang, Yang, Yanping, Du, Xueyan, Yuan, Xiaoyuan, Zhang, Yingjie, Jiao, Meiyuan, Liu, Xiongjun, Jiang, Suihe, Wang, Hui, Rempel, Andrey A., Zhang, Xiaobin, Zeng, Qiaoshi, and Lu, Z. P.

Published
2024
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5. Stability of vacancy-free crystalline phases of titanium monoxide at high pressure and temperature

Author

Chtchelkatchev, N. M., Ryltsev, R. E., Magnitskaya, M. V., and Rempel, Andrey A.

Subjects
Physics - Chemical Physics, Condensed Matter - Materials Science, Condensed Matter - Strongly Correlated Electrons
Abstract

There have existed for a long time a paradigm that TiO phases at ambient conditions are stable only if structural vacancies are available. Using an evolutionary algorithm, we perform an ab initio search of possible zero-temperature polymorphs of TiO in wide pressure interval. We obtain the Gibbs energy of the competing phases taking into account entropy via quasiharmonic approximation and build the pressure-temperature diagram of the system. We reveal that two vacancy-free hexagonal phases are the most stable at relatively low temperatures in a wide range of pressures. The transition between these phases takes place at 28 GPa. Only above 1290 K at ambient pressure the phases with vacancies (B1-derived) become stable. In particular, the high-pressure hexagonal phase is shown to have unusual electronic properties, with a pronounced pseudo-gap in the electronic spectrum. The comparison of DFT-GGA and GW calculations demonstrates that the account for many-body corrections significantly changes the electronic spectrum near the Fermi energy., Comment: 5 pages, 3 figures

Published
2019
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11. Nanostructured Cadmium Sulfide CdS

Author

Sadovnikov, Stanislav I., Rempel, Andrey A., Gusev, Aleksandr I., Hull, Robert, Series editor, Jagadish, Chennupati, Series editor, Kawazoe, Yoshiyuki, Series editor, Osgood, Richard M., Series editor, Parisi, Jürgen, Series editor, Pohl, Udo W., Series editor, Seong, Tae-Yeon, Series editor, Uchida, Shin-ichi, Series editor, Wang, Zhiming M., Series editor, Sadovnikov, Stanislav I., Rempel, Andrey A., and Gusev, Aleksandr I.

Published
2018
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12. Size Characterization of Nanostructured Materials

Author

Sadovnikov, Stanislav I., Rempel, Andrey A., Gusev, Aleksandr I., Hull, Robert, Series editor, Jagadish, Chennupati, Series editor, Kawazoe, Yoshiyuki, Series editor, Osgood, Richard M., Series editor, Parisi, Jürgen, Series editor, Pohl, Udo W., Series editor, Seong, Tae-Yeon, Series editor, Uchida, Shin-ichi, Series editor, Wang, Zhiming M., Series editor, Sadovnikov, Stanislav I., Rempel, Andrey A., and Gusev, Aleksandr I.

Published
2018
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13. Nanostructured Silver Sulfide Ag2S

Author

Sadovnikov, Stanislav I., Rempel, Andrey A., Gusev, Aleksandr I., Hull, Robert, Series editor, Jagadish, Chennupati, Series editor, Kawazoe, Yoshiyuki, Series editor, Osgood, Richard M., Series editor, Parisi, Jürgen, Series editor, Pohl, Udo W., Series editor, Seong, Tae-Yeon, Series editor, Uchida, Shin-ichi, Series editor, Wang, Zhiming M., Series editor, Sadovnikov, Stanislav I., Rempel, Andrey A., and Gusev, Aleksandr I.

Published
2018
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14. Nanostructured Lead Sulfide PbS

Author

Sadovnikov, Stanislav I., Rempel, Andrey A., Gusev, Aleksandr I., Hull, Robert, Series editor, Jagadish, Chennupati, Series editor, Kawazoe, Yoshiyuki, Series editor, Osgood, Richard M., Series editor, Parisi, Jürgen, Series editor, Pohl, Udo W., Series editor, Seong, Tae-Yeon, Series editor, Uchida, Shin-ichi, Series editor, Wang, Zhiming M., Series editor, Sadovnikov, Stanislav I., Rempel, Andrey A., and Gusev, Aleksandr I.

Published
2018
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23. Homogeneous Age-hardening of Large-sized Al-Sc Foams via Micro-alloying with Zr and Ti.

Author

Chu, Xuming, Wang, Tianze, Yang, Donghui, Peng, Xiangyang, Hou, Shuo, Chen, Shuai, Lu, Guangyao, Jiao, Meiyuan, Wu, Yuan, Rempel, Andrey A., Qu, Wentao, Li, Hongxiang, and Wang, Hui

Subjects
PRECIPITATION hardening, MICROALLOYING, FOAM, ALUMINUM foam, HEAT treatment, METAL foams, THERMAL conductivity
Abstract

Al-based foams have drawn increasing attention from industry due to their integration of structure and functional properties. However, large-sized Al-based foams still cannot be homogeneously strengthened by long-time aging due to their low thermal conductivity. In this study, we proposed an age-hardening approach that was applied in large-sized Al-0.16Sc-0.17Zr (wt.%) foams via micro-alloying with Zr and Ti compared with Al-0.21Sc foams; it not only achieved homogeneous strength by long-term aging but also reduced the cost of the alloy by substituting Zr and Ti for the more expensive Sc content. The results show that the Al3(Sc, Zr, Ti) phase with a core–shell structure as a crucial precipitation strengthening phase by micro-alloying with Zr and Ti was less prone to coarsening after a prolonged aging heat treatment. Therefore, the yielding strength of Al-Sc foam micro-alloying with Zr and Ti remained almost unchanged after a maximum aging time of 1440 h due to less coarsening precipitate, which is consistent with the results of mechanical experiments. These findings provide a new way for the heat treatment strengthening of large-sized Al-based foams, thus promoting their industrial applications. [ABSTRACT FROM AUTHOR]

Published
2024
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47. Photophysics of α-azinyl-substituted 4,4-difluoro-8-(4-R-phenyl)-4-bora-3a,4a-diaza-s-indacenes

Author

Pevtsov, Dmitry N., primary, Nikolenko, Lyubov, additional, Nevidimov, Alexander V., additional, Tovstun, Sergey A., additional, Gadomska, Anna V., additional, Kuzmin, Vladimir A., additional, Razumov, Vladimir F., additional, Trestsova, Maria A., additional, Utepova, Irina A., additional, Chupakhin, Oleg N., additional, Shchepochkin, Alexander V., additional, Valeeva, Albina A., additional, and Rempel, Andrey A., additional

Published
2022
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