Готові списки джерел за темами / Ion-cubic metals

Добірка наукової літератури з теми "Ion-cubic metals"

Автор: Grafiati

Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Ion-cubic metals"

Rose, D. N., H. Turner, and K. O. Legg. "Ion-acoustic microscopy." Canadian Journal of Physics 64, no. 9 (September 1, 1986): 1284–86. http://dx.doi.org/10.1139/p86-222.

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This paper details the modifications to an existing ion implanter that were made to adapt it for ion-acoustic microscopy. Results of tests of the technique on samples of cubic zirconia and alumina implanted with nitrogen ions are described. The utility of the technique for monitoring the progress of implantation in metals and ceramics is discussed.

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Hu, Cheng, Q. M. Jonathan Wu, Jun Shen, Shigeo Kotake, and Yasuyuki Suzuki. "Cubic BN formation by ion implantation." Thin Solid Films 402, no. 1-2 (January 2002): 117–20. http://dx.doi.org/10.1016/s0040-6090(01)01681-9.

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Clapham, L., J. L. Whitton, A. Mashayekhi, G. Carter, I. Katardjiev, and M. J. Nobes. "Effect of alloying on ion-bombardment-induced surface topography on face-centred cubic metals." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 48, no. 1-4 (March 1990): 571–75. http://dx.doi.org/10.1016/0168-583x(90)90185-w.

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Kim, Sang-Pil, Huck Beng Chew, Eric Chason, Vivek B. Shenoy, and Kyung-Suk Kim. "Nanoscale mechanisms of surface stress and morphology evolution in FCC metals under noble-gas ion bombardments." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 468, no. 2145 (May 23, 2012): 2550–73. http://dx.doi.org/10.1098/rspa.2012.0042.

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Here, we uncover three new nanoplasticity mechanisms, operating in highly stressed interstitial-rich regions in face-centred-cubic (FCC) metals, which are particularly important in understanding evolution of surface stress and morphology of a FCC metal under low-energy noble-gas ion bombardments. The first mechanism is the configurational motion of self-interstitials in subsonic scattering during ion bombardments. We have derived a stability criterion of self-interstitial scattering during ion embedding, which consistently predicts the possibility of vacancy- and interstitial-rich double-layer formation for various ion bombardments. The second mechanism is the growth by gliding of prismatic dislocation loops (PDLs) in a highly stressed interstitial-rich zone. This mechanism allows certain prismatic dislocations with their Burgers vectors parallel to the surface to grow in subway-glide mode (SGM) during ion bombardment. The SGM growth creates a large population of nanometre-sized prismatic dislocations beneath the surface. The third mechanism is the Burgers vector switching of a PDL that leads to unstable eruption of adatom islands during certain ion bombardments of FCC metals. We have also derived the driving force and kinetics for the growth by gliding of prismatic dislocations in an interstitial-rich environment as well as the criterion for Burgers vector switching, which consistently clarifies previously unexplainable experimental observations.

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Moriarty, John A., Lorin X. Benedict, James N. Glosli, Randolph Q. Hood, Daniel A. Orlikowski, Mehul V. Patel, Per Söderlind, Frederick H. Streitz, Meijie Tang, and Lin H. Yang. "Robust quantum-based interatomic potentials for multiscale modeling in transition metals." Journal of Materials Research 21, no. 3 (March 1, 2006): 563–73. http://dx.doi.org/10.1557/jmr.2006.0070.

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Анотація:

First-principles generalized pseudopotential theory (GPT) provides a fundamental basis for transferable multi-ion interatomic potentials in transition metals and alloys within density-functional quantum mechanics. In the central body-centered cubic (bcc) metals, where multi-ion angular forces are important to materials properties, simplified model GPT (MGPT) potentials have been developed based on canonical d bands to allow analytic forms and large-scale atomistic simulations. Robust, advanced-generation MGPT potentials have now been obtained for Ta and Mo and successfully applied to a wide range of structural, thermodynamic, defect, and mechanical properties at both ambient and extreme conditions. Selected applications to multiscale modeling discussed here include dislocation core structure and mobility, atomistically informed dislocation dynamics simulations of plasticity, and thermoelasticity and high-pressure strength modeling. Recent algorithm improvements have provided a more general matrix representation of MGPT beyond canonical bands, allowing improved accuracy and extension to f-electron actinide metals, an order of magnitude increase in computational speed for dynamic simulations, and the development of temperature-dependent potentials.

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Sliusarchuk, L. I., L. I. Zheleznova, S. V. Kuleshov, and O. K. Trunova. "Mono- and heterocomplexes of Co(II), Nd(III) with oxalic acid and phenanthroline: synthesis, structure and thermal decomposition." Voprosy Khimii i Khimicheskoi Tekhnologii, no. 3 (June 2022): 74–82. http://dx.doi.org/10.32434/0321-4095-2022-142-3-74-82.

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This work presents the results of studies aimed at determining the conditions for the synthesis of a new heterometallic complex of Co(II) and Nd(III) with oxalic acid in the presence of 1,10-phenanthroline, studying its composition, structure, thermal properties and its ability to form complex oxides. The hetero- and monocomplexes [Сo(C2O4)Phen]24Н2О, [Nd2(C2O4)32Phen], [Сo2Nd2(C2O4)52Phen]4Н2О (Phen – phenanthroline) were synthesized. The complexes were investigated by the following physicochemical research methods: elemental analysis, differential thermal analysis, IR- and diffuse reflection electronic spectroscopies, and X-ray powder diffraction. Based on the analysis of electronic and IR spectra, it was shown that ions of metals bind bidentately with ions of oxalates and with molecules of 1,10-phenanthroline. The structures of the ion of cobalt and ion of neodymium correspond to the distorted octahedron. The ions of metals are bound together by oxalate ligands. The powders of oxides were prepared by thermolysis of the heterocomplex up to 8000C and 10000C. The composition of the obtained oxide powders was controlled by X-ray powder diffraction. When the heterocomplex is heated to 8000C, in addition to the complex oxide NdCoO3, we obtained the following oxides: Nd2O3 (hexagonal crystal system), Nd2O3 (cubic crystal system) and Co3O4 (cubic crystal system). After heating to 10000C, a more pure complex oxide NdCoO3 was obtained. Neodymium cobaltate NdCoO3 crystallizes in the cubic crystal system, the unit cell parameter is a=3.770 Å, the cell volume is 53.568 Å3. The average crystallite size was calculated using the Scherrer formula, and it is equal to ~35 nm. The synthesized heterometallic complex [Сo2Nd2(C2O4)52Phen]4Н2О can be used as a precursor for the preparation of cobaltate of neodymium with lower energy consumption than in solid-phase synthesis.

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Moser, W. R., B. J. Marshik, J. Kingsley, M. Lemberger, R. Willette, A. Chan, J. E. Sunstrom, and A. Boye. "The synthesis and characterization of solid-state materials produced by high shear-hydrodynamic cavitation." Journal of Materials Research 10, no. 9 (September 1995): 2322–35. http://dx.doi.org/10.1557/jmr.1995.2322.

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A new method for the synthesis of complex metal oxides, based on hydrodynamic cavitation, was used to prepare pure phase, nanostructured solid-state materials. The continuous process afforded a wide variety of metal oxides in grain sizes of 1-10 nm. Catalysts, ceramics, superconductors, piezoelectrics, and zeolites were prepared by cavitational synthesis. The method enabled the synthesis of fine particles of metals and metal oxides supported on high surface area supports such as silica, and the synthesis of fine particles of cubic zirconia without ion modification.

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Kean Chin, Kee, and Say Leong Ong. "A Study of Reclamation of Sewage for Industrial Waters." Water Science and Technology 23, no. 10-12 (May 1, 1991): 2181–87. http://dx.doi.org/10.2166/wst.1991.0676.

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The performance of a 480 cubic metres per day water reclamation plant was evaluated. The treatment train of this plant was sand filtration or carbon adsorption −0.45 µm cartridge filtration - reverse osmosis desalting - zeolite ion exchange deionisation. The raw water used was reclaimed sewage which had been treated by the activated sludge system and polished by chemical coagulation and flocculation, multimedia sand filtration and chlorination. After the reverse osmosis step using the spiral wound cellulose acetate membrane most of the cations, anions and heavy metals present in the water were removed.

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Sharma, Anupam Deep, and M. M. Sinha. "Lattice Dynamics of Protonic Conductors AZrO₃ (A = Ba, Sr & Pb): A Comparative Study." Advanced Materials Research 685 (April 2013): 191–94. http://dx.doi.org/10.4028/www.scientific.net/amr.685.191.

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Recently, many investigations were devoted to the study of family of perovskite-type ABO3oxides. The material belongs to ABO3 perovskite oxides family like SrZrO3, BaZrO3, PbZrO3have many characteristics which are suitable for high-voltage and high-reliability capacitor applications. Many acceptor-doped perovskite-type oxides show high protonic conductivity at elevated temperatures. In addition to their reduced temperature operation relative to traditional oxide ion conductors such as Y-stabilized ZrO2, these perovskites, because of their proton transport properties, offer the possibility of application in a number of arenas including hydrogen sensors for molten metals and hydrogen pumps. In this work we are reporting the results of our theoretical investigation on the phonon properties of ABO3mainly BaZrO3, PbZrO3& SrZrO3in cubic phases. The phonon properties are calculated by using lattice dynamical simulation method based on de Launey angular force (DAF) constant model to understand the role of phonon in these systems. The phonon dispersion curves of these proton conductors in cubic phase are also drawn.

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Ensinger, W., and M. Kiuchi. "Cubic nitrides of the sixth group of transition metals formed by nitrogen ion irradiation during metal condensation." Surface and Coatings Technology 84, no. 1-3 (October 1996): 425–28. http://dx.doi.org/10.1016/s0257-8972(95)02808-0.

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Більше джерел

Тези доповідей конференцій з теми "Ion-cubic metals"

Hou, Changjun, Jiale Dong, Yan Xu, Danqun Huo, Yike Tang, and Jun Yang. "Preparation and Characterization of Pt/WO3 Nano-Film and Its Hydrogen-Sensing Properties." In 2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2008. http://dx.doi.org/10.1115/micronano2008-70010.

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Tungsten trioxide is an n-type semiconductor, which has been extensively used for the development of metal oxide semiconductor gas sensors. The hydrogen gas sensing performance of platinum (Pt) catalyst activated WO3 thin films were investigated here. All of the Pt/WO3 films membranes are sensitive to hydrogen gas and the sample by sol-gel and DC reactive magnetron sputtering methods. X-ray diffraction results indicate that the tungsten trioxide is cubic crystal, and the AFM analysis shows molecular structures of the samples are tetrahedron. It means the four consecutive quadrilateral forms we observed in the 9nmx9nm molecular structure are scattergram of tungsten-ions and oxide-ions on 106 sides in WO2.9 structure cell, and the lost one oxide-ion resulted in the transition of WO3 to WO2.9. With anneal temperature rising, the membranous poriness decreasing. The higher crystal degree is, the lower gasochromic efficiency is. The change of combining environment and content of O−2 ions in colorized / decolorized state WOx films was observed in XPS analysis of Pt/WO3 film, the peak shape had changed greatly. As a result, the explanation to this phenomenon is available here according to XPS chemical shift of electric potential model theory.

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