Relevant bibliographies by topics / Ytterbium borides

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  1. Journal articles
  2. Dissertations / Theses

Academic literature on the topic 'Ytterbium borides'

Author: Grafiati
Published: 8 November 2023

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Journal articles on the topic "Ytterbium borides"

1

White, James P., Haibin Deng, and Sheldon G. Shore. "Borohydride complexes of europium(II) and ytterbium(II) and their conversion to metal borides. Structures of (L)4Yb[BH4]2 (L = CH3CN, C5H5N)." Inorganic Chemistry 30, no. 10 (May 1991): 2337–42. http://dx.doi.org/10.1021/ic00010a022.

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2

Ipatov, Aleksey G., Evgeniy V. Kharanzhevskiy, and Sergey N. Shmykov. "Structure and tribological properties of super-hardened strengthening coatings based on boron carbide." Tekhnicheskiy servis mashin, no. 2 (June 10, 2020): 134–40. http://dx.doi.org/10.22314/2618-8287-2020-58-2-134-140.

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The use of standard alloys, in particular steels, to increase the wear resistance of contact surfaces in mechanical engineering in most cases has lost its relevance due to low mechanical and tribological properties. Currently, in mechanical engineering, as well as in repair production, technologies for obtaining functional and restorative coatings that differ significantly from the properties of the product material are widely implemented. (Research purpose) The research purpose is in studying the physical and tribological properties of ceramic coatings obtained by laser melting of fine powder materials. (Materials and methods) Authors used a powder mixture based on boron carbide and nitride as the initial powder materials as the most solid, heat-resistant and chemically inert compounds, additionally doped with magnesium oxide and lithium. Authors used an ytterbium fiber laser with a maximum power of 50 watts as a laser radiation generator. (Results and discussion) It was found that laboratory studies confirm the high adhesion of the ceramic coating with a steel substrate. It also was found that stable chemical compounds based on iron carbides and borides are formed in the fusion zone. The article notes that the high impact strength of the coating was confirmed by the shock tests of samples-in the impact (destruction) zone, there is no formation of significant cracks and chips of the coating, the fusion zone without traces of separation and destruction. The article shows that the lowest coefficient of friction at elevated temperature and dynamic loads is observed in coatings with the presence of metal oxides, this is explained by the accelerated formation of a tribofilm based on boric acid. (Conclusions) The presented results have a high scientific basis and practical potential. The low coefficient of friction and high wear resistance allow to use the results of research in tribo-couplings that are operated under high temperatures and kinematic characteristics.
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Guélou, Gabin, Maya Martirossyan, Kazuo Ogata, Isao Ohkubo, Yohei Kakefuda, Naoyuki Kawamoto, Yuuki Kitagawa, et al. "Rapid deposition and thermoelectric properties of ytterbium boride thin films using hybrid physical chemical vapor deposition." Materialia 1 (September 2018): 244–48. http://dx.doi.org/10.1016/j.mtla.2018.06.003.

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4

Weng, Hongming, Jianzhou Zhao, Zhijun Wang, Zhong Fang, and Xi Dai. "Topological Crystalline Kondo Insulator in Mixed Valence Ytterbium Borides." Physical Review Letters 112, no. 1 (January 7, 2014). http://dx.doi.org/10.1103/physrevlett.112.016403.

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Ohkubo, Isao, Takashi Aizawa, Katsumitsu Nakamura, and Takao Mori. "Control of Competing Thermodynamics and Kinetics in Vapor Phase Thin-Film Growth of Nitrides and Borides." Frontiers in Chemistry 9 (July 27, 2021). http://dx.doi.org/10.3389/fchem.2021.642388.

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Thin-film growth is a platform technique that allows the preparation of various undeveloped materials and enables the development of novel energy generation devices. Preferred phase formation, control of crystalline orientation and quality, defect concentration, and stoichiometry in thin films are important for obtaining thin films exhibiting desired physical and chemical properties. In particular, the control of crystalline phase formation by utilizing thin-film technology favors the preparation of undeveloped materials. In this study, thin-film growth of transition metal nitride and rare-earth metal boride was performed using remote plasma–assisted molecular beam epitaxy and hybrid physical–chemical vapor deposition techniques, and was successfully achieved by tuning the competition between thermodynamics and kinetics during vapor-phase thin-film growth. Growth conditions of high crystalline quality titanium nitride thin films and high phase purity ytterbium boride thin films were not thermodynamically favorable. Appropriate control of the contribution degree of thermodynamics and kinetics during vapor-phase thin-film growth is crucial for fabricating high phase purity and high crystalline quality thin films.
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Dissertations / Theses on the topic "Ytterbium borides"

1

Salupo, Terese A. "Preparation of ytterbium and europuim borides from Yb(II) and Eu(II) boron hydride precursors /." The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487846885778319.

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Barratt, Julian P. "Neutron scattering studies of heavy fermion behaviour in YbNi←2B←2C." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365688.

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3

Bouvet, Alain. "Étude par diffusion inélastique de neutrons des propriétés magnétiques de borures de terre rare : CeB6, PrB6 et YbB12." Université Joseph Fourier (Grenoble ; 1971-2015), 1993. http://www.theses.fr/1993GRE10186.

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Cette thèse porte sur l'étude par diffusion inélastique de neutrons des propriétés magnétiques de borures de terre rare : ceb#6, prb#6 et ybb#1#2. La difficulté de réalisation des expériences, notamment la faiblesse des signaux due en partie à la forte absorption des neutrons par le bore, nous a conduit à inclure, dans un programme d'analyse, la correction d'absorption. La partie principale de cette thèse a été l'étude des interactions magnétiques dans les phases ordonnées de ceb#6 et prb#6. Nous avons confirmé la présence d'interactions magnétiques quadrupolaires importantes, grâce à la mesure des excitations magnétiques dans la phase quadrupolaire de ceb#6 en appliquant un champ magnétique dont la valeur était comprise entre 0 et 6 t, et dans les phases double-k et simple-k basse température de prb#6. De plus nous avons montré qu'il semble exister une compétition entre les interactions magnétiques quadrupolaires et les interactions magnétiques dipolaires dans le compose ceb#6, alors que les interactions quadrupolaires dans prb#6 semblent au contraire renforcer la structure magnétique dipolaire. Les mesures effectuées avec le compose ybb#1#2 nous ont permis de donner une valeur de 60 k pour l'énergie du gap, cette valeur étant conforme à celles obtenues par des mesures de résistivité et d'optique. De plus nous proposons un schéma de niveau de champ cristallin, avec le niveau fondamental #8 et les niveaux excites #7 et #6 a respectivement 18 et 39 mev. En annexe, nous présentons également les résultats obtenus par diffusion inélastique de neutrons avec le compose bidimensionnel xy bani#2(po#4)#2. Un programme a été développé pour déconvoluer les spectres mesures de la fonction de résolution instrumentale à 4 dimensions. Les largeurs intrinsèques, ainsi déterminées, de la diffusion magnétique critique ne montrent aucune caractéristique des excitations non linéaires prévues par la théorie, mais peut être expliqué uniquement par une renormalisation des ondes de spin
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4

Salupo, Terese A. "Preparation of ytterblum and europlum borides from Yb(II) and Eu(II) boron hydride precursors." The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1302887981.

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