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Artículos de revistas sobre el tema "Metal density":
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Shatha Raheem Helal Alhimidi, Manal A. Mohammed Al-Jabery, Nadia Ezzat Alkurbasy y Muhsen Abood Muhsen Al-Ibadi. "QTAIM analysis for Metal - Metal and Metal- Non-metal Bonds in Tri-Osmium cluster". Journal of Kufa for Chemical Sciences 2, n.º 10 (5 de noviembre de 2023): 299–310. http://dx.doi.org/10.36329/jkcm/2023/v2.i10.12523.
Electron density of the interaction of the compound's chemical bonding has been computed using topological analysis. The findings suggest that Os-Os, Os-N, and Os-H bonds have experienced bond critical points (BCP) with corresponding bonds paths (BP). The presence of N-C bridging atoms is significantly impacted by electron density of Os2-Os3 bond distribution therefore no critical point found and bond path. So, due to their positive electron density (b), negative laplacian 2(b), and positive the total energy density H(b) values, the Os-NC, Os-H, and Os-CO bonds all have transit closed-shell topological properties.
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Macchi, Piero, Davide M. Proserpio y Angelo Sironi. "Experimental Electron Density in a Transition Metal Dimer: Metal−Metal and Metal−Ligand Bonds". Journal of the American Chemical Society 120, n.º 51 (diciembre de 1998): 13429–35. http://dx.doi.org/10.1021/ja982903m.
Macchi, P., L. Garlaschelli, S. Martinengo y A. Sironi. "Charge Density in Transition Metal Clusters: Supported vs Unsupported Metal−Metal Interactions". Journal of the American Chemical Society 121, n.º 44 (noviembre de 1999): 10428–29. http://dx.doi.org/10.1021/ja9918977.
Prajapati, Vinita, P. L. Verma P.L.Verma, Dhirendra Prajapati y B. K. Gupta B.K.Gupta. "Density Functional Calculations of EPR Parameter g Tensors of Some Transition Metal Complexes". Indian Journal of Applied Research 2, n.º 2 (1 de octubre de 2011): 139–41. http://dx.doi.org/10.15373/2249555x/nov2012/52.
Allahverdiyeva, Kh V., N. T. Kakhramanov, M. I. Abdullin, G. S. Martynova y D. R. Nurullayeva. "RHEOLOGICAL PROPERTIES OF METAL-FILLED SYSTEMS BASED ON HIGH-DENSITY POLYETHYLENE AND ALUMINUM". Azerbaijan Chemical Journal, n.º 2 (2 de junio de 2022): 40–46. http://dx.doi.org/10.32737/0005-2531-2022-2-40-46.
The paper considers the fundamental principles of the study of the rheological features of the melt flow of the initial high-density polyethylene and its filled compositions with aluminum powder, depending on the filler concentration, temperature and shear rate. To improve the compatibility of metal-polymer systems, a compatibilizer has been used, which is a graft copolymer of high-density polyethylene containing 5.6 wt. % maleic anhydride. The flow curves and the dependence of the effective viscosity on the shear rate of the initial high-density polyethylene and composites containing 0.5 wt. % and 5.0 wt. % aluminum powder has been determined. The regularity of the change in the effective viscosity of the melt on the temperature in Arrhenius coordinates has been established. Based on the curves obtained, the values of the activation energy of the viscous flow have been determined. A temperature-invariant characteristic of the composites viscosity properties has been drawn, which makes it possible to predict the change in the value of this indicator at high shear rates, close to their processing by extrusion and injection molding. The developed materials have been tested at the METAK LLC enterprise in Azerbaijan
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Huang, Ju-Sheng, I.-Chung Lee y Biing-Jauh Lin. "Recovery of Heavy Metal from Scrap Metal Pickling Wastewater by Electrolysis". Water Science and Technology 28, n.º 7 (1 de octubre de 1993): 223–29. http://dx.doi.org/10.2166/wst.1993.0166.
When the influent surface loading of copper ion in the four-stage continuous-flow reactors of electrolysis were controlled at 143.9, 94.0, 52.7 and 33.2 mg/min-dm2, respectively, and current density were controlled at 3.9, 2.6, 1.3 and 1.3A/dm2, respectively, the concentration of copper decreased from 13,900 to l,900mg/l (i.e., the electro-deposition rate of copper were 2,700, 2,240, 1,500 and 750 mg/dm2-h, respectively). The purity of copper depositing on the cathode reached over 98%. When the current density was ranged from 1.3 to 3.9A/dm2, the electro-deposition rate of copper increased with the increasing current density. However, when the current density was raised above 5.2 A/dm2, the electro-deposition rate of copper decreased with the increasing current density. The increase of current density decreased the current efficiency and increased the specific energy consumption. The increase of influent surface loading of copper ion increased the current efficiency and decreased the specific energy consumption.
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Aruga, Tetsuya. "Charge-density waves on metal surfaces". Journal of Physics: Condensed Matter 14, n.º 35 (22 de agosto de 2002): 8393–414. http://dx.doi.org/10.1088/0953-8984/14/35/310.
Wilbur, Paul J. y Ronghua Wei. "High‐current‐density metal‐ion implantation". Review of Scientific Instruments 63, n.º 4 (abril de 1992): 2491–93. http://dx.doi.org/10.1063/1.1142922.
Söderlind, Per, O. Eriksson, J. Trygg, B. Johansson y J. M. Wills. "Density-functional calculations for cerium metal". Physical Review B 51, n.º 7 (15 de febrero de 1995): 4618–21. http://dx.doi.org/10.1103/physrevb.51.4618.
Johnson, Erin R., Ross M. Dickson y Axel D. Becke. "Density functionals and transition-metal atoms". Journal of Chemical Physics 126, n.º 18 (14 de mayo de 2007): 184104. http://dx.doi.org/10.1063/1.2723118.
Hamilton, Craig D. "Density functional calculations of organometallic complexes containing metal-metal multiple bonds /". The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487950153600457.
McAllister, B. P. "A density functional theory study of reactions of metal and metal oxides". Thesis, Queen's University Belfast, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426760.
Louca, P. "From X-ray structure factors to electron-density distributions". Thesis, University of Bristol, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374638.
Ravetz, Megan Sarah. "Effect metal electron density on C-H activation reactions". Thesis, University of Salford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360458.
Burrill, Daniel. "Density Functional Theory Study of Dilute Transition Metal Phthalocyanines". ScholarWorks @ UVM, 2015. http://scholarworks.uvm.edu/graddis/508.
Organometallic (OM) crystals are studied in fields ranging from spintronics to photovoltaics. This thesis focuses on studying a particular class of OM crystals known as transition metal-phthalocyanines (TM-Pc) - a molecular crystal composed of chains of planar OM molecules with a transition metal center and four coordinated pyrrole-aromatic rings joined by nitrogen atoms, similar to porphyrin. The structure resembles a dish rack pattern where the planar TM-Pcs of adjacent chains are oriented nearly perpendicular to each other. While TM-Pcs have been studied for decades due to their interesting optical properties and applications as dyes, there has been recent interest in understanding the magnetic properties with various transition metals.
Due to crystal arrangement, inter-chain interactions among TM-Pcs are relatively weak when compared to intra-chain interactions. This property allows the chains of TM-Pcs to be isolated and approximated as a pseudo 1D system. The electronic structure and spin exchange are computationally examined along chains of CuPc when they have been diluted with the metal-free variant, H2Pc. Density functional theory is employed with the Hubbard U correction to account for electron interactions on the copper d-orbitals. Since the diluted systems are effectively 1D with narrow bands along their stacking axis, a 1D Heisenberg model is applied where the exchange coefficient is determined through the Broken Symmetry method. Additionally, the effect of non-local corrections, used to determine structural features, on the Hubbard U and Heisenberg exchange coefficient, J, are discussed.
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Zhuang, Houlong. "First-principles studies of metal-carbon nanotube systems". Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B39395789.
Zhuang, Houlong y 庄厚龍. "First-principles studies of metal-carbon nanotube systems". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39395789.
Wang, Jiaqi. "Transition Metal Catalyzed Oxidative Cleavage of C-O Bond". Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc801914/.
The focus of this thesis is on C-O bonds activation by transition metal atoms. Lignin is a potential alternative energy resource, but currently is an underused biomass species because of its highly branched structure. To aid in better understanding this species, the oxidative cleavage of the Cβ-O bond in an archetypal arylglycerol β-aryl ether (β–O–4 Linkage) model compound of lignin with late 3d, 4d, and 5d metals was investigated. Methoxyethane was utilized as a model molecule to study the activation of the C-O bond. Binding enthalpies (ΔHb), enthalpy formations (ΔH) and activation enthalpies (ΔH‡) have been studied at 298K to learn the energetic properties in the C-O bond cleavage in methoxyethane. Density functional theory (DFT) has become a common choice for the transition metal containing systems. It is important to select suitable functionals for the target reactions, especially for systems with degeneracies that lead to static correlation effects. A set of 26 density functionals including eight GGA, six meta-GGA, six hybrid-GGA, and six hybrid-meta-GGA were applied in order to investigate the performance of different types of density functionals for transition metal catalyzed C-O bond cleavage. A CR-CCSD(T)/aug-cc-pVTZ was used to calibrate the performance of different density functionals.
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Bansal, Shubhra. "Characterization of Nanostructured Metals and Metal Nanowires for Ultra-High Density Chip-to-Package Interconnections". Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14041.
Nanocrystalline materials are being explored as potential off-chip interconnects materials for next generation microelectronics packaging. Mechanical behavior and deformation mechanisms in nanocrystalline copper and nickel have been explored. Nanostructured copper interconnections exhibit better fatigue life as compared to microcrystalline copper interconnects at a pitch of 100 and #956;m and lower. Nanocrystalline copper is quite stable upto 100 oC whereas nickel is stable even up to 400 oC. Grain boundary (GB) diffusion along with grain rotation and coalescence has been identified as the grain growth mechanism. Ultimate tensile and yield strength of nanocrystalline (nc) Cu and Ni are atleast 5 times higher than microcrystalline counterparts. Considerable amount of plastic deformation has been observed and the fracture is ductile in nature. Fracture surfaces show dimples much larger than grain size and stretching between dimples indicates localized plastic deformation. Activation energies for creep are close to GB diffusion activation energies indicating GB diffusion creep. Creep rupture at 45o to the loading axis and fracture surface shows lot of voiding and ductile kind of fracture. Grain rotation and coalescence along direction of maximum resolved shear stress plays an important role during creep. Grain refinement enhances the endurance limit and hence high cycle fatigue life. However, a deteriorating effect of grain refinement has been observed on low cycle fatigue life. This is because of the ease of crack initiation in nanomaterials. Persistent slip bands (PSBs) at an angle of 45o to loading axis are observed at higher strain ranges (> 1% for nc- Cu) with a width of about 50 nm. No relationship has been observed between PSBs and crack initiation. A non-recrystallization annealing treatment, 100 oC/ 2 hrs for nc- Cu and 250 oC/ 2 hrs for nc- Ni has been shown to improve the LCF life without lowering the strength much. Fatigue crack growth resistance is higher in nc- Cu and Ni compared to their microcrystalline counterparts. This is due to crack deflection at GBs leading to a tortuous crack path. Nanomaterials exhibit higher threshold stress intensity factors and effective threshold stress intensity is proportional to the elastic modulus of the material.
Duen, Ho Fat y United States. National Aeronautics and Space Administration., eds. Modeling of metal-ferroelectric-semiconductor field effect transistors. [Washington, D.C: National Aeronautics and Space Administration, 1998.
Duen, Ho Fat y United States. National Aeronautics and Space Administration., eds. Modeling of metal-ferroelectric-semiconductor field effect transistors. [Washington, D.C: National Aeronautics and Space Administration, 1998.
United States. National Aeronautics and Space Administration., ed. Advanced chemical propulsion at NASA Lewis: Metallized and high energy density propellants. [Washington, DC]: National Aeronautics and Space Administration, 1991.
Wüthrich, Rolf. Aqueous electrolysis under extreme current densities: Application to micro and nano-systems fabrication. Hauppauge, N.Y: Nova Science Publisher's, 2010.
Edelberg, Drew Adam. Systems of Transition Metal Dichalcogenides: Controlling Applied Strain and Defect Density With Direct Impact on Material Properties. [New York, N.Y.?]: [publisher not identified], 2019.
Gy, Hutiray y Sólyom J, eds. Charge density waves in solids: Proceedings of the international conference held in Budapest, Hungary, September 3-7, 1984. Berlin: Springer-Verlag, 1985.
1936-1984, McMillan William L., Hutiray Gy, So lyom J y International Conference on Charge Density Waves in Solids (1984 : Budapest, Hungary)., eds. Charge density waves in solids: Proceedings of the International Conference held in Budapest, Hungary, September 3-7, 1984. Berlin: Springer-Verlag, 1985.
Capítulos de libros sobre el tema "Metal density":
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Spittel, M. y T. Spittel. "Density of light metal alloys". En Part 2: Non-ferrous Alloys - Light Metals, 96–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-13864-5_10.
Salahub, D. R., M. Castro, R. Fournier, P. Calaminici, N. Godbout, A. Goursot, C. Jamorski et al. "Density Functional Description of Metal-Metal and Metal-Ligand Bonds". En Theoretical and Computational Approaches to Interface Phenomena, 187–218. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4899-1319-7_11.
Lang, Norton D. "Density Functionals and the Description of Metal Surfaces". En Density Functional Methods In Physics, 233–63. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4757-0818-9_9.
Liebsch, Ansgar. "Density Functional Theory of Metal Surfaces". En Electronic Excitations at Metal Surfaces, 5–48. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4757-5107-9_2.
Wegner, Franz. "Density Correlations Near the Mobility Edge". En Localization and Metal-Insulator Transitions, 337–46. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4613-2517-8_27.
Sahni, Viraht. "Application of Q-DFT to the Metal–Vacuum Interface". En Quantal Density Functional Theory II, 303–53. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-92229-2_17.
Spittel, M. y T. Spittel. "4.6 Density of steel". En Metal Forming Data of Ferrous Alloys - deformation behaviour, 111–14. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-44760-3_10.
Hibst, H. "Metal Evaporated Tapes and Co-Cr Media for High Definition Video Recording". En High Density Digital Recording, 137–59. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1636-7_5.
Dwivedi, Dheerendra Kumar. "Power Density and Peak Temperature of Welding Processes". En Fundamentals of Metal Joining, 65–70. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-4819-9_4.
Ling, M. F. "Ab Initio Calculations of Magnetic Interactions in Magnetic Metal Alloys via the LSDF Approach". En Electronic Density Functional Theory, 381. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4899-0316-7_27.
Actas de conferencias sobre el tema "Metal density":
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BURJA, Jaka, Barbara ŠETINA BATIČ, Tilen BALAŠKO y Jožef MEDVED. "Challenges of Making Low density Fe-Mn-Al-C steels". En METAL 2022. TANGER Ltd., 2022. http://dx.doi.org/10.37904/metal.2022.4408.
Ying-Hui Wang y Tadatomo Suga. "Metal surface cleanliness and its improvement on bonding". En High Density Packaging (ICEPT-HDP). IEEE, 2010. http://dx.doi.org/10.1109/icept.2010.5582798.
Subramaniam, Kalavathi, Albert Victor Kordesch y Mazlina Esa. "Increased Capacitance Density with Metal-Insulator-Metal - Metal Finger Capacitor (MIM-MFC)". En 2006 IEEE International Conference on Semiconductor Electronics. IEEE, 2006. http://dx.doi.org/10.1109/smelec.2006.380695.
Hu, Zhili, Bjorn Carlberg, Cong Yue, Xingming Guo y Johan Liu. "Modeling of nanostructured polymer-metal composite for thermal interface material applications". En High Density Packaging (ICEPT-HDP). IEEE, 2009. http://dx.doi.org/10.1109/icept.2009.5270706.
Jin, Peng, Qifeng Zhou, Na Wu y Qun Zhong. "Thermal analysis and testing of multi layer ceramic-metal packaged LED". En High Density Packaging (ICEPT-HDP). IEEE, 2009. http://dx.doi.org/10.1109/icept.2009.5270774.
Zhang, Yahui, Zhili Hu, Yan Zhang, Lilei Ye y Johan Liu. "Molecular dynamics simulation for the bonding energy of metal-SWNT interface". En High Density Packaging (ICEPT-HDP). IEEE, 2011. http://dx.doi.org/10.1109/icept.2011.6066886.
Luo, Xiaobing, Han Feng, Jv Liu, Ming Lu Liu y Sheng Liu. "An experimental investigation on thermal contact resistance across metal contact interfaces". En High Density Packaging (ICEPT-HDP). IEEE, 2011. http://dx.doi.org/10.1109/icept.2011.6066936.
Muha, Damir, Kresimir Malaric y Nikola Banovic. "Testing Metal Density in Shielded Fabric". En 2019 International Conference on Software, Telecommunications and Computer Networks (SoftCOM). IEEE, 2019. http://dx.doi.org/10.23919/softcom.2019.8903747.
Padmanabhan, Revathy, Navakanta Bhat y S. Mohan. "High-density metal-insulator-metal capacitors using Gd2O3-based dielectrics". En 2012 International Conference on Emerging Electronics (ICEE 2012). IEEE, 2012. http://dx.doi.org/10.1109/icemelec.2012.6636227.
Nugrahaningtyas, Khoirina Dwi, Marita Maharani Putri y Teguh Endah Saraswati. "Metal phase and electron density of transition metal/HZSM-5". En THE 14TH JOINT CONFERENCE ON CHEMISTRY 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0005561.
Schoendorff, George. United abominations: Density functional studies of heavy metal chemistry. Office of Scientific and Technical Information (OSTI), enero de 2012. http://dx.doi.org/10.2172/1048519.
Hartwig, K. T. y I. Karaman. High Density Amorphous Metal Matrix Composites for Kinetic Energy Penetrators. Fort Belvoir, VA: Defense Technical Information Center, mayo de 2005. http://dx.doi.org/10.21236/ada432881.
McHenry, Michael. Amorphous Metal Ribbon (AMR) and Metal Amorphous Nanocomposite (MANC) Materials Enabled High Power Density Vehicle Motor Applications. Office of Scientific and Technical Information (OSTI), marzo de 2023. http://dx.doi.org/10.2172/1984067.
Johnston, Randy F. Electron Density Modulation of Catalytic Metal Centers by Substituted Aryl-Isocyanide Ligands. Fort Belvoir, VA: Defense Technical Information Center, septiembre de 1989. http://dx.doi.org/10.21236/ada212875.
Fang, Zhigang. A New Generation High Density Thermal Battery Based on Advanced Metal Hydride. Office of Scientific and Technical Information (OSTI), junio de 2015. http://dx.doi.org/10.2172/1183573.
Wilbur, P. J. Ultrahigh-current-density metal-ion implantation and diamondlike-hydrocarbon films for tribological applications; Final report. Office of Scientific and Technical Information (OSTI), septiembre de 1993. http://dx.doi.org/10.2172/143969.
Decolvenaere, Elizabeth y Ann Elisabet Wills. DENSITY FUNCTIONAL THEORY APPLIED TO TRANSITION METAL ELEMENTS AND BINARIES: DEVELOPMENT APPLICATION AND RESULTS OF THE V-DM/16 TEST SET. Office of Scientific and Technical Information (OSTI), octubre de 2016. http://dx.doi.org/10.2172/1562832.
Dobbins, Tabbetha. UNDERSTANDING THE LOCAL ATOMIC LEVEL EFFECTS OF DOPANTS IN COMPLEX METAL HYDRIDES USING SYNCHROTRON XRAY ABSORPTION SPECTROSCOPY AND DENSITY FUNCTIONAL THEORY. Office of Scientific and Technical Information (OSTI), febrero de 2013. http://dx.doi.org/10.2172/1063111.
Jacob, Gregor, Christopher U. Brown y Alkan Donmez. The influence of spreading metal powders with different particle size distributions on the powder bed density in laser-based powder bed fusion processes. Gaithersburg, MD: National Institute of Standards and Technology, marzo de 2018. http://dx.doi.org/10.6028/nist.ams.100-17.
Buchler, M., H. G. Schoneich y F. Stalder. DRS04BSS Criteria to Assess the Alternating Current Corrosion Risk of Cathodically Protected Pipelines. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), enero de 2004. http://dx.doi.org/10.55274/r0011818.
This paper addresses the assessment of the corrosion risk of a pipeline due to alternating currents. The state of the art technique is the use of coupons, which simulate a coating fault and which allow to measure the ac-current density and also to evaluate corrosion products and pits. Recently, different criteria to assess the corrosion risk have been proposed that are based on the ratio between ac- and dc-current density or the instantaneous off-potential (high-speed off-potential measurement) measured on a coupon. Furthermore, the charge needed to oxidize corrosion products (under alkaline conditions) on a corroded steel surface indicates the level of metal loss. These criteria are discussed on the basis of field experience from coupons and from alternating current-corrosion pits on high voltage interfered pipelines. Results from long term laboratory corrosion measurements under constant AC and DC load are presented which indicate that not only a reduction of pipe/ground AC potential but also a careful adjustment of cathodic protection level helps to minimize a.c. corrosion rates. Based on the results from cyclic potentiodynamic experiments under alkaline conditions, a basic model explaining AC corrosion on cathodically protected pipelines has been developed.
