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Contributions to the Data on Theoretical Metallurgy: [Part] 16. Thermodynamic Properties of Nickel and its Inorganic Compounds

Description: From Introduction: "The compilation of thermodynamic properties of nickel and its inorganic compounds was undertaken as part of a continuing effort by the Federal Bureau of Mines to provide information for the extractive metallurgist to use as guidelines for research on improving established process or developing new ones. This report also provides useful information for other areas of thermochemical research."
Date: unknown
Creator: Mah, Alla D. & Pankratz, L. B.
Partner: UNT Libraries Government Documents Department

Conversion of Nicaro Nickel Oxide to Nickel Metal

Description: Report issued by the Bureau of Mines over testing conducted on nickel oxide to produce nickel metal. Details of testing methods and results are presented. This report includes tables, illustrations, and photographs.
Date: 1959
Creator: Mahan, W. M.; Melcher, N. B.; Riott, J. P. & Ostrowski, E. J.
Partner: UNT Libraries Government Documents Department

In situ spectroscopic detection of SMSI effect in a Ni/CeO2 system: hydrogen-induced burial and dig out of metallic nickel

Description: In situ APPES technique demonstrates that the strong metal support interaction effect (SMSI) in the Ni-ceria system is associated with the decoration and burial of metallic particles by the partially reduced support, a phenomenon reversible by evacuation at high temperature of the previously absorbed hydrogen.
Date: June 29, 2010
Creator: Caballero, Alfonso; Holgado, Juan P.; Gonzalez-delaCruz, Victor M.; Habas, Susan e.; Herranz, Tirma & Salmeron, Miquel
Partner: UNT Libraries Government Documents Department

Electrodeposit of Nickel

Description: The purpose of this study is to investigate the varying conditions in types of solutions, concentrations of solutions, hydrogen-ion concentration, current densities and potentials in the electro deposition of nickel.
Date: August 1937
Creator: Rohrer, Charles Stephen
Partner: UNT Libraries

Cladding Alloys for Fluoride Salt Compatibility

Description: This report provides an overview of several candidate technologies for cladding nickel-based corrosion protection layers onto high-temperature structural alloys. The report also provides a brief overview of the welding and weld performance issues associated with joining nickel-clad nickel-based alloys. From the available techniques, two cladding technologies were selected for initial evaluation. The first technique is a line-of-sight method that would be useful for cladding large structures such as vessel interiors or large piping. The line-of-sight method is a laser-based surface cladding technique in which a high-purity nickel powder mixed into a polymer binder is first sprayed onto the surface, baked, and then rapidly melted using a high-power laser. The second technique is a vapor phase technique based on the nickel-carbonyl process that is suitable for cladding inaccessible surfaces such as the interior surfaces of heat exchangers. An initial evaluation for performed on the quality of nickel claddings processed using the two selected cladding techniques.
Date: June 1, 2011
Creator: Muralidharan, Govindarajan; Wilson, Dane F; Walker, Larry R; Santella, Michael L & Holcomb, David Eugene
Partner: UNT Libraries Government Documents Department

Determining the "State of Charge" of Nickel-Cadmium Batteries by Farad Capacitance Measurements

Description: From abstract: "A rapid simple method has been developed for determining state of charge of the widely used nickel-cadium rechargeable battery. The method described is based on the experimentally verified relationship between farad capacitance and state of charge."
Date: August 1968
Creator: Latner, Norman
Partner: UNT Libraries Government Documents Department

Synthesis and Characterization of Dimethylbis(2-pyridyl)borate Nickel(II) Complexes: Unimolecular Square-Planar to Square-Planar Rotation around Nickel(II)

Description: This article reports the synthesis, characterization, and solution dynamics of the novel nickel(II) complexes (dimethylbis(2-pyridyl)borate)(triphenylphosphine)nickel(II) chloride (4) and (dimethylbis(2-pyridyl)borate)nickel(II) acetylacetonate (6).
Date: April 7, 2014
Creator: Celaje, Jeff A.; Pennington-Boggio, Megan K.; Flaig, Robinson W.; Richmond, Michael G. & Williams, Travis J.
Partner: UNT College of Arts and Sciences

Layered nickel based superconductors

Description: We review the properties of Ni-based superconductors which contain Ni{sub 2}X{sub 2} (X=As, P, Bi, Si, Ge, B) planes, a common structural element to the recently discovered FeAs superconductors. We also compare the properties ofthe Ni-and Fe-based systems from a perspective ofelectronic structure as well as structure-property relations.
Date: January 1, 2009
Creator: Ronning, Filip; Bauer, Eric D; Park, Tuson; Kurita, Nobuyuki; Klimczuk, T; Movshovich, R et al.
Partner: UNT Libraries Government Documents Department

Electrodeposition of Nickel and Nickel Alloy Coatings with Layered Silicates for Enhanced Corrosion Resistance and Mechanical Properties

Description: The new nickel/layered silicate nanocomposites were electrodeposited from different pHs to study the influence on the metal ions/layered silicate plating solution and on the properties of the deposited films. Nickel/layered silicate nanocomposites were fabricated from citrate bath atacidic pHs (1.6−3.0), from Watts’ type solution (pH ~4-5), and from citrate bath at basic pH (~9). Additionally, the new nickel/molybdenum/layered silicate nanocomposites were electrodeposited from citrate bath at pH 9.5. The silicate, montmorillonite (MMT), was exfoliated by stirring in aqueous solution over 24 hours. The plating solutions were analyzed for zeta potential, particle size, viscosity, and conductivity to investigate the effects of the composition at various pHs. The preferred crystalline orientation and the crystalline size of nickel, nickel/layered silicate, nickel/molybdenum, and nickel/molybdenum/layered silicate films were examined by X-ray diffraction. The microstructure of the coatings and the surface roughness was investigated by scanning electron microscopy and atomic force microscopy. Nickel/molybdenum/layered silicate nanocomposites containing low content of layered silicate (1.0 g/L) had increase 32 % hardness and 22 % Young’s modulus values over the pure nickel/molybdenum alloy films. The potentiodynamic polarization and electrochemical impedance measurements showed that the nickel/molybdenum/layered silicate nanocomposite layers have higher corrosion resistance in 3.5% NaCl compared to the pure alloy films. The corrosion current density of the nickel/molybdenum/layered silicate nanocomposite composed of 0.5 g/L MMT is 0.63 µA·cm-2 as compare to a nickel/molybdenum alloy which is 2.00 µA·cm-2.
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Date: August 2014
Creator: Tientong, Jeerapan
Partner: UNT Libraries

Surface modification of nickel battery electrodes by cobalt plasma immersion ion implantation and deposition

Description: Nickel hydroxide is the electrochemically active material in the positive electrode of several important rechargeable alkaline-electrolyte batteries. It is believed that divalent Ni(OH){sub 2} is converted to trivalent NiOOH as the electrode is electrochemically oxidized during the battery charging process, and the reverse reaction (electrochemical reduction) occurs during battery discharge, however the details of this process are not completely understood. Because these electrochemical reactions involve surface charge-transfer processes, it is anticipated that surface modification may result in improved battery performance. We used broad-beam metal ion implantation and Metal Plasma Immersion Ion Implantation and Deposition to add cobalt and other species to the nickel electrode surface. The principle of the latter technique is explained in detail. It is shown that implanted and deposited cobalt ions act as a dopant of Ni(OH){sub 2}, and thereby alter its electronic conductivity. This electronic effect promotes lateral growth of NiOOH nodules and more-complete conversion of Ni(OH){sub 2} to NiOOH, which can be interpreted in terms of the nodule growth model. Other dopants such as Au, W, Pb, Ta and Ti{sub 4}O{sub 7} were also tested for suppressing the parasitic oxygen evolution reaction in rechargeable nickel cells.
Date: February 1, 1995
Creator: Anders, S.; Anders, A.; Brown, I.; Kong, F. & McLarnon, F.
Partner: UNT Libraries Government Documents Department

Reconstruction of surfaces in NiO

Description: We studied the reconstructions of surfaces in NiO by atomistic simulations which utilize Buckingham short range potentials and the shell model. It was found that (hk0) surfaces prefer to reconstruct into (100) surface facets which has the lowest energy. The interaction between these (100) facets is repulsive and converges to zero as size of facets grows. The (111) surface can be stabilized by reconstruction into (100) micro-facets.
Date: July 1, 1995
Creator: Yan, M. & Chen, S.P.
Partner: UNT Libraries Government Documents Department

Measuring the wavelengths of the Ni-like 4d <sup>1</sup>S<sub>0</sub> (arrow) 4p <sup>1</sup>P<sub>1</sub> and 4f <sup>1</sup>P<sub>1</sub> (arrow) 4d <sup>1</sup>P<sub>1</sub> x-ray laser lin

Description: In this work we present measurements of the wavelengths of the nickel-like 3d9 4d IS0 + 3d94p � P, X-ray laser line in several low-Z nickel-like ions ranging from yttrium (Z=39) to cadmium (Z=45). With the help of these laser results, we identify this line to very high accuracy in nonlasing plasmas from gallium (Z=3 1) to molybdenum (Z=42). The measured wavelengths are compared with optimized level calculations using the multi-configuration Dirac-Fock code of Grant et al. As an example, for yttrium, we calculate a wavelength of 240.2 A, and measure wavelengths of 240.1 I i 0.30 A in the lasing plasma and 240.135 + 0.015 A in the nonlasing plasma. Accurate values of these wavelengths are essential for performing plasma imaging and interferometry experiments with multilayer optics which use the X-ray laser to backlight other plasmas. These results also provide important atomic data which is currently missing about the energy of the Id � S, level in the Ni I sequence and help guide evperimentalists who are looking for lasing in these materials for the first time. We also observe lasing on the nickel-like 3d9 4f � P, + 3d94d � P, X-ray laser line in Zr, Nb, and Iv10 and present measured wavelengths for these ions as well as predicted values for other nearby ions.
Date: September 21, 1998
Creator: Churilov, S; Nilsen, J & Ryobtsev, A
Partner: UNT Libraries Government Documents Department

Carbon-Hydrogen Bond Activation, C-N Bond Coupling, and Cycloaddition Reactivity of a Three-Coordinate Nickel Complex Featuring a Terminal Imido Ligand

Description: In this study, we describe reaction chemistry of the first nickel(II) complexes having a terminally bound imido ligand, (dtbpe)Ni=NR (R = 2,6-ⁱPr₂C₆H₃, 2,3,6-Me₃C₆H₂ (Mes), and Ad) with various small unsaturated molecules.
Date: December 1, 2014
Creator: Mindiola, Daniel J.; Waterman, Rory; Iluc, Vlad M.; Cundari, Thomas R. & Hillhouse, Gregory L.
Partner: UNT College of Arts and Sciences

A Batch Wafer Scale LIGA Assembly and Packaging Technique vai Diffusion Bonding

Description: A technique using diffusion bonding (or solid-state welding) has been used to achieve batch fabrication of two- level nickel LIGA structures. Interlayer alignment accuracy of less than 1 micron is achieved using press-fit gauge pins. A mini-scale torsion tester was built to measure the diffusion bond strength of LIGA formed specimens that has shown successful bonding at temperatures of 450"C at 7 ksi pressure with bond strength greater than 100 Mpa. Extensions to this basic process to allow for additional layers and thereby more complex assemblies as well as commensurate packaging are discussed.
Date: January 27, 1999
Creator: Christenson, T.R. & Schmale, D.T.
Partner: UNT Libraries Government Documents Department

Torsion Testing of Diffusion Bonded LIGA Formed Nickel

Description: A test technique has been devised which is suitable for the testing of the bond strength of batch diffusion bonded LIGA or DXRL defined structures. The method uses a torsion tester constructed with the aid of LIGA fabrication and distributed torsion specimens which also make use of the high aspect ratio nature of DXRL based processing. Measurements reveal achieved bond strengths of 130MPa between electroplated nickel with a bond temperature of 450 C at 7 ksi pressure which is a sufficiently low temperature to avoid mechanical strength degradation.
Date: January 27, 1999
Creator: Buchheit, T.E.; Christenson, T.R. & Schmale, D.T.
Partner: UNT Libraries Government Documents Department

Understanding and Tailoring the Mechanical Properties of LIGA Fabricated Materials

Description: LIGA fabricated materials and components exhibit several processing issues affecting their metallurgical and mechanical properties, potentially limiting their usefulness for MEMS applications. For example, LIGA processing by metal electrodeposition is very sensitive to deposition conditions which causes significant processing lot variations of mechanical and metallurgical properties. Furthermore, the process produces a material with a highly textured lenticular rnicrostructural morphology suggesting an anisotropic material response. Understanding and controlling out-of-plane anisotropy is desirable for LIGA components designed for out-of-plane flexures. Previous work by the current authors focused on results from a miniature servo-hydraulic mechanical test frame constructed for characterizing LIGA materials. Those results demonstrated microstructural and mechanical properties dependencies with plating bath current density in LIGA fabricated nickel (LIGA Ni). This presentation builds on that work and fosters a methodology for controlling the properties of LIGA fabricated materials through processing. New results include measurement of mechanical properties of LIGA fabricated copper (LIGA Cu), out-of-plane and localized mechanical property measurements using compression testing and nanoindentation of LIGA Ni and LIGA Cu.
Date: January 25, 1999
Creator: Buchheit, T.E.; Christenson, T.R.; Lavan, D.A. & Schmale, D.T.
Partner: UNT Libraries Government Documents Department

Toward a More Rational Design of the Direct Synthesis of Aniline: A Density Functional Theory Study

Description: This article uses plane-wave density functional theory calculations to investigate the direct amination of benzene catalyzed by a Ni(111) surface to explore the reaction intermediates and to understand the role of nickel in this reaction.
Date: March 24, 2017
Creator: Alsunaidi, Zainab H. A.; Cundari, Thomas R. & Wilson, Angela K.
Partner: UNT College of Arts and Sciences

STABILITY CONSTANTS AND INTRINSIC SOLUBILITY OF SEVERAL NICKEL(II)-vic- DIOXIME COMPLEXES

Description: An investigation was made to determine the stability constants for several Ni(II) vic-dioximes and to calculate their intrinsic solubility constants. Data and discussion concerning dimethylglyoxime, diethylgiyoxime. di- npropylglyoxime, ethylmethylglyoxime, 4-isoproplynioxime, nioxime, 4- methylnioxime, 3-methylnioxime, heptoxime, and Ni(II) complexes of these vic- dioximes are presented. (J.R.D.)
Date: March 1, 1962
Creator: Banks, C.V. & Anderson, S.
Partner: UNT Libraries Government Documents Department