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Academic literature on the topic 'NI Coil'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "NI Coil"

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Hwang, Young Jin. "Design and Characteristic Analysis of a Homopolar Synchronous Machine Using a NI HTS Field Coil." Energies 14, no. 18 (September 8, 2021): 5658. http://dx.doi.org/10.3390/en14185658.

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This paper deals with a homopolar synchronous machine (HSM) applying high-temperature superconducting (HTS) field coils. Superconductors, especially high-temperature superconductors, have high potential as advanced materials for next-generation electrical machines due to their high critical current density and excellent mechanical strength. However, coils made with high-temperature superconductors have a high risk of being damaged in the event of a quench due to the intrinsic low normal zone propagation velocity (NZPV). Therefore, the coil protection issue has been regarded as one of the most important research fields in HTS coil applications. Currently, the most actively studied method for quench protection of the HTS coils is the no-insulation (NI) winding technique. The NI winding technique is a method of winding an HTS coil without inserting an insulating material between turns. This method can automatically bypass the current to the adjacent turn when a local quench occurs inside the HTS coil, greatly improving the operating stability of the HTS coils. Accordingly, many institutions are conducting research to develop advanced electrical machines using NI HTS coils. However, the NI HTS coil has its intrinsic charge/discharge delay problem, which makes it difficult to successfully develop electrical machines using the NI HTS coil. In this study, we investigated how this charging/discharging problem appeared when the NI HTS coil was used in an HTS homopolar synchronous machine (HSM) which is one of the electrical machines with a high possibility of applying the HTS coil in the future because it has a stationary field coil structure. For this, the characteristic resistances of HTS coils were experimentally obtained and applied to the simulation model.
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Hwang, Young Jin, Jae Young Jang, and SangGap Lee. "A Flux-Controllable NI HTS Flux-Switching Machine for Electric Vehicle Applications." Applied Sciences 10, no. 5 (February 25, 2020): 1564. http://dx.doi.org/10.3390/app10051564.

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This paper deals with a flux-controllable NI HTS flux-switching machine (FSM) for electric vehicle (EV) applications. In a variable-speed rotating machine for EVs, such as electric buses, electric aircraft and electric ships, an electric motor capable of regulating the flux offers the advantage of constant output operation. In general, conventional HTS rotating machines have excellent flux-regulation performance, because they excite an HTS field coil. However, it is difficult to ensure any flux-regulation capabilities in HTS rotating machines using HTS field coils that apply the no-insulation (NI) winding technique, due to the inherent charge and discharge delays in these machines. Nevertheless, the NI winding technique is being actively researched as a key technology for the successful development of HTS rotating machines, because it can dramatically improve the operational stability of HTS field coils. Therefore, research to implement an HTS rotating machine with flux-regulation capabilities, while improving the operating stability of the HTS field coil using the NI winding technique, is required for EV applications. In this paper, we propose an HTS rotating machine with a flux switching structure, a type of topology of a rotating machine that is being actively studied for application to the electric motors used in EVs. The proposed HTS flux-switching machine (FSM) uses NI field coils, but additional field windings are applied for flux regulation, which enables flux control. In this study, an NI HTS field coil was also fabricated and tested because the characteristic resistance value should be used for the design and characteristic analyses of machines which utilize an NI coil. The simulation model used to analyze the flux-regulation performance capabilities of the NI HTS FSM were devised based on the characteristic resistance values obtained from a charging test of the fabricated NI HTS field coil. This study can provide a good reference for further research, including work on the manufacturing of a prototype NI HTS FSM for EV applications, and it can be used as a reference for the development of other HTS rotating machines, such as those used in large-scale wind power generation, where flux-regulation capabilities are required.
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Yang, S., X. Chen, and S. Motojima. "Vapor Phase Growth of Carbon Microcoils / Nanocoils." Journal of Metastable and Nanocrystalline Materials 23 (January 2005): 387–0. http://dx.doi.org/10.4028/www.scientific.net/jmnm.23.387.

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The carbon microcoils and carbon nanocoils were prepared by the catalytic pyrolysis of acetylene under the Ni and/or Fe-containing catalysts, and the growth pattern, morphology and growth mechanism of the carbon coils were examined in detail. The inner coil diameter of carbon microcoils are of several µm and coil gap from zero to several µm. The inner coil diameter of carbon nanocoils are from zero to several ten nm and coil gap from zero to several nm. The carbon microcoils are generally of double helix coils such as DNA while carbon nanocoils were single helix coils such as α-helix proteins, with spring-like or twisted forms. A catalyst grain was usually observed on the tip of carbon coil. The carbon nanocoils are almost amorphous and can be graphitized by the high temperature heat-treatment.
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Manhartsberger, Clemens, and Walter Seidenbusch. "Force delivery of Ni-Ti coil springs." American Journal of Orthodontics and Dentofacial Orthopedics 109, no. 1 (January 1996): 8–21. http://dx.doi.org/10.1016/s0889-5406(96)70158-0.

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Shao, Liangjun, Xintao Zhang, Yufan Yan, Haoyuan Wang, Huajun Liu, and Timing Qu. "Design of a 20 T Class REBCO Insert in a 15 T Low Temperature Superconducting Magnet." Electronics 10, no. 14 (July 20, 2021): 1741. http://dx.doi.org/10.3390/electronics10141741.

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A 20 T REBCO insert magnet has been designed considering a 15 T/150 mm background field generated by an LTS magnet. A two-nested-coil structure was chosen. The target of this project is to generate a 20 T/80 mm user field by inserting the outer MI-REBCO coil (Coil 2) first, then try to reach 35 T by inserting the inner NI-REBCO test coil (Coil 1). Coil 2 will be wound by copper packed, 185-μm thick REBCO tapes co-wound with 50-μm thick Hastelloy tapes. Coil 1 will be no-insulated wound by 65-μm thick REBCO tapes. Two mechanical models were built to estimate the stress distribution inside the HTS coils during operation. The influence of the screening current distribution on stress was discussed. The unbalanced force caused by the coil misalignment was also simulated. The 20 T HTS insert magnet is planned to be built and tested in 2021. The progress of coil winding and preliminary test results at 77 K were presented.
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Dong, Fangliang, Dongkeun Park, Wooseung Lee, Luning Hao, Zhen Huang, Juan Bascuñán, Zhijian Jin, and Yukikazu Iwasa. "On fault-mode phenomenon in no-insulation superconducting magnets: A preventive approach." Applied Physics Letters 121, no. 19 (November 7, 2022): 194101. http://dx.doi.org/10.1063/5.0122493.

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Here, we present experimental and analytical results of a preventive approach applied to a fault-mode phenomenon caused by electrodes or power-source failure in a no-insulation (NI) high-temperature superconducting REBa2Cu3O7−x (REBCO, RE = rare earth) magnet. It is generally agreed that the NI magnets, at least those of laboratory scale, are self-protected from overheating and, therefore, from quenching, chiefly because of turn-to-turn current bypassing unique to NI. However, these NI magnets do experience unexpected quenches, e.g., when the current through the magnet suddenly drops due to the aforementioned fault-mode phenomenon. Here, we report this phenomenon of a sudden-discharging-triggered quench of an NI REBCO coil, conduction-cooled, and operated at 4.2 K. We also present our preventive approach for this phenomenon that relies on an appropriately designed resistor shunted across the coil terminals. With this shunt resistor, a quench was prevented by suppressing the quench initiating turn-to-turn heat and induced overcurrent within the NI winding, and the coil current decayed safely.
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Wang, Yue, Jin Xie, Fengtian Zhang, Fenggang Tao, Zhuang Xiong, and Chao Zhi. "A bi-stable mechanism actuated by patterned permanent magnet and Cu-Ni integrated micro-coil." Journal of Micromechanics and Microengineering 32, no. 3 (February 14, 2022): 035005. http://dx.doi.org/10.1088/1361-6439/ac5170.

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Abstract This paper presents a bi-stable mechanism, which mainly consists of a suspended mass, a spacer and a bottom plate. Electromagnetic actuation is used for switching between two states (i.e. ‘On/Off’ state). The actuation is achieved via permanent magnet (PM) on the suspended mass and micro-coils embedded in the bottom plate. Different from spiral coil and central core in conventional design, micro-coils in this paper integrate Cu and Ni together as a whole, acting as both coil and ferromagnetic core. This integration simplifies the fabrication into one-mask process. Furthermore, chessboard patterned PM is utilized with Cu-Ni integrated micro-coils to generate enhanced force density. The bi-stable mechanism is designed, fabricated and experimentally characterized. Total size of this mechanism is 16 × 14 × 2 mm3. No power is needed for holding either of the state. Switching processes (both ‘On’ to ‘Off’ and ‘Off’ to ‘On’) can be realized with external acceleration of 24 G (gravity) and 37 G, respectively. Furthermore, resetting (i.e. ‘On’ to ‘Off’) can also be accomplished with 1.5 A current input.
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Yanagisawa, Y., M. Hamada, K. Hashi, and H. Maeda. "Review of recent developments in ultra-high field (UHF) NMR magnets in the Asia region." Superconductor Science and Technology 35, no. 4 (March 7, 2022): 044006. http://dx.doi.org/10.1088/1361-6668/ac5644.

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Abstract This paper reviews recent developments in ultra-high field (UHF) superconducting magnets for nuclear magnetic resonance (NMR) in the Asia regionin particular, those for high-resolution NMR magnets using high-temperature superconductor (HTS) coils. In Japan, a power supply driven-mode 1.02 GHz (24.0 T) NMR magnet using a Bi2Sr2Ca2Cu3O10-δ (Bi-2223) inner coil was developed in 2015, providing the first high-resolution NMR at a 1H NMR frequency of >1 GHz (23.5 T). In late 2017, a new project was started to develop a persistent-mode 1.3 GHz (30.5 T) NMR magnet comprising a RE(rare earth)Ba2Cu3O7-δ (REBCO) inner coil, a Bi-2223 middle coil, and a low-temperature superconductor (LTS) outer coil. The magnet employs the newly developed state-of-the-art superconducting joints between HTSs necessary for the persistent-mode operation, as well as magnet technologies providing an ultra-high magnetic field of >30.5 T with high temporal stability and spatiality homogeneity for high-resolution NMR measurement. In China, a ∼20 mm cold bored magnet comprising an LTS outer coil and no-insulation (NI) REBCO inner coils was developed and recorded a field of 32.35 T, the highest magnetic field ever achieved with an all-superconducting magnet, which can be used as a small cold-bored NMR. In Korea, a liquid helium-free 400 MHz (9.39 T) all REBCO NMR magnets using NI winding was developed, which is operational. These technologies provide future perspectives for a UHF NMR magnet with key features of persistent-mode operation, an operating field of 1.4 GHz using (32.9 T)-class magnets, and the liquid helium-free operation.
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Tsuji, K. "Design of Ni-Ti-Cu Alloy Coil Spring." Journal of Engineering for Industry 114, no. 1 (February 1, 1992): 105–8. http://dx.doi.org/10.1115/1.2899746.

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A new method of coil spring design applicable to Ni-Ti-Cu shape memory alloy was studied. Design values agreed well with measurements within the range of 2 K of operating temperature, thus justifying the design. The present design method is based on the characteristics of shear stress, shear strain, and phase transformation temperature as its principal data, and therefore is accurate and superior in that the design can accommodate material deterioration and that the operation temperature can be determined.
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Mahajan, Akshay S., Amol A. Verulkar, Ratnadip A. Lohakpure, Twinkle D. Bajaj, Shweta A. Dhope, and Sara R. Bhurani. "Modified ‘S’ shape ring for reactivation of open coil spring: A clinical pearl." IP Indian Journal of Orthodontics and Dentofacial Research 8, no. 2 (May 15, 2022): 113–16. http://dx.doi.org/10.18231/j.ijodr.2022.019.

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Ni-Ti open coil springs are often used for opening spaces for crowded or for distalization of the molar teeth. Predetermining the length of open coil spring required to open up the exact amount of space is rather difficult, and sometimes, the length of the open coil spring falls short to open up the entire space required. Open coil spring usually requires reactivation to gain enough space in the arch or between two adjacent teeth. This paper highlights the chairside method of reactivation of NiTi open coil spring with the use of modified ‘S’ shape ring without removing the base archwire.
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Dissertations / Theses on the topic "NI Coil"

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MONTEIRO, Roana d’Ávila Souza. "Caracterização eletromecânica de mini molas superelásticas de nitinol em regime de efeito memória de forma sob carga constante." Universidade Federal de Campina Grande, 2015. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/453.

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Capes
As Ligas com Memória de Forma (LMF) constituem uma classe de materiais metálicos que possuem a capacidade de recuperar uma deformação pseudo plástica, introduzida por aplicação de carga mecânica, e retornar à sua forma original através de um simples aquecimento. O principal interesse nos atuadores de LMF utilizados no formato de molas helicoidais reside no grande deslocamento proporcionado pelo fenômeno de Efeito Memória de Forma (EMF), que permite a realização de trabalho mecânico quando este componente é submetido a diferentes condições de temperatura e cargas mecânica. No caso de elementos de LMF em estado de superelasticidade (SE) na temperatura ambiente, quando a carga mecânica é aplicada e mantida sob o material, a deformação originada pela formação de martensita induzida por tensão poderá também ser revertida por meio de um aquecimento. Nesse caso, tem-se um EMF em um elemento de LMF originalmente superelástico. Nesse contexto, o objetivo deste trabalho é realizar a caracterização eletromecânica de uma mini mola superelástica de LMF NiTi (Nitinol) quando submetida a um carregamento mecânico constante, avaliando a influência da taxa de variação da corrente elétrica e do aumento da carga mecânica nas temperaturas de transformação, além de determinar o comportamento do deslocamento com a variação de resistência elétrica. Para isso, foi desenvolvida uma plataforma experimental capaz de submeter a mini mola a carregamento mecânico constante (peso) e sinais de corrente elétrica variáveis com o tempo. Verificou-se que, para todas as cargas mecânicas e níveis de corrente elétrica, os resultados para a taxa de variação da corrente elétrica mais lenta (6 mA/s) apresentou uma melhor resposta em deslocamento e na variação da resistência elétrica quando comparados com a taxa mais rápida (12 mA/s), embora esta última resulte em um comportamento histerético mais estreito (resistência elétrica versus deslocamento). Também foi observado um aumento das temperaturas de transformação com o aumento da carga mecânica, como esperado pela lei de Clausius-Clayperon para LMF. Finalmente, foi verificada uma relação praticamente linear entre a variação do deslocamento e a variação de resistência elétrica, no aquecimento e no resfriamento.
The Shape Memory Alloys (SMA) are a class of metallic materials that have the ability to recover pseudo plastic deformation introduced by the application of mechanical load, and return to original shape by heating. The main interest in the SMA actuators used in the form of coil springs lies in the large displacement provided by the shape memory effect (SME) phenomenon, which allows performing mechanical work when the component is subjected to varying conditions of temperatures and mechanical loads. In the case of SMA elements in a state of superelasticity (SE) at room temperature, when mechanical load is applied and maintained on the material, the deformation caused by the formation of stress induced martensite can be reversed by heating. In this case, we have a SME in a SMA element originally superelastic. In this context, the objective of this work is to realize the electromechanical characterization of a superelastic mini coil spring of Ni-Ti SMA (Nitinol), when subjected to a constant mechanical loading, evaluating the influence of the electric current rate, the influence of mechanical load on the phase transformation temperatures, and determining the displacement behavior to the variation of electrical resistance. For this, an experimental platform was developed to submit the mini spring under constant load (dead weight) to electric current signals varying with time. It was found that for all mechanical loads and electrical current levels, the results for the slower rate of change electrical current (6 mA/s) showed a better response in displacement and the variation in the electrical resistance when compared to faster rate (12 mA/s), although the faster rate present a narrower hysteretic behavior (electrical resistance vs displacement). There was also verified an increase in phase transformation temperatures with increased mechanical load, as expected by the Clausius-Clayperon law for SMA. Finally, a practically linear relationship was found between the change in displacement with the variation in electrical resistance, during heating and cooling.
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Berg, Marie. "Removal of Ni (II) from water using recombinant Escherichia coli." Thesis, KTH, Skolan för bioteknologi (BIO), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-149288.

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Pearson, S. "An investigation into the effects of zirconium addition and increased crystallinity upon the hydrothermal stability of Ni/Alumina methanation catalysts." Thesis, University of Reading, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235312.

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Perera, Chaminda Kithsiri. "The Effects of Mercury on the Performance of Ni/YSZ Anode in a Planar Solid Oxide Fuel Cell." Ohio University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1268934012.

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Silva, Giovanna Rodrigues Nóbile da. "Síntese e caracterização de complexos de Ni(II) com fosfinas e N-aril- sulfonilditiocarbimatos e suas atividades biológicas." Universidade Federal de Viçosa, 2015. http://www.locus.ufv.br/handle/123456789/7604.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Este trabalho descreve a síntese e o estudo da atividade antifúngica e antibacteriana de quatorze complexos de Ni(II) com fosfinas e N-arilsulfonilditiocarbimatos, e de dez sais derivados de complexos aniônicos bis(N-arilsulfonilditiocarbimato)niquelato(II). Os complexos neutros apresentam a fórmula geral [Ni(S 2C=NSO2R)(Fosfina)], sendo R= C6H5, 4-CH3C6H5, 2-CH3C6H5, 4-FC6H5,4-ClC6H5,4-BrC6H5,4-IC6H5, e Fosfina = cis-1,2- bis(difenilfosfina)eteno(dppet) ou trifenilfosfina (PPh3). Destes, oito são inéditos. Os sais apresentam a fórmula geral: [A]2[Ni(S2C=NSO2R)2], sendo A = (PPh3Me+), (PPh3Et+), (PPh3Bu+), (PPh4+) e (C4H9N+) e R= C6H5 , 4-FC6H5. Destes, seis são inéditos. Para a caracterização dos compostos foram utilizadas medidas de condutividade, medidas de pontos de fusão, espectroscopia eletrônica (UV-vis), espectroscopia vibracional (IV), espectroscopia de ressonância magnética nuclear (RMN de 1H e 13 C), e espectrometria de massas de alta resolução. Os dados físico-químicos obtidos estão consistentes com as fórmulas propostas. Os resultados dos experimentos de espectrometria de massas de alta resolução estão consistentes com as composições esperadas. Os espectros vibracionais indicaram a presença dos ligantes nas substâncias sintetizadas e os espectros de UV-vis e RMN confirmaram uma geometria quadrática em torno do átomo de níquel. A atividade dos compostos foi testada frente o fungo Colletotrichum acutatum e as bactérias Escherichia coli e Staphylococcus aureus. Para os compostos neutros com a fosfina dppet, o método Poison Food não se mostrou eficiente para avaliar a atividade antifúngica devido à baixa solubilidade em água dessas substâncias. Já os compostos neutros contendo trifenilfosfina se mostraram muito ativos contra essa espécie de fungo, com os valores de IC50 de modo geral menores que bis(dietilditiocarbamato)zinco, princípio ativo do fungicida Ziram. Não foi possível a obtenção dos valores de IC50 para os compostos iônicos, pois houve a precipitação dos compostos no meio de cultura, mesmo assim foi observada uma atividade de 20 a 45% de inibição para esses compostos a 1,0 mmol.L-1. Somente os compostos com trifenilfosfina apresentaram atividade contra a bactéria E.coli, os demais compostos não mostraram difusão no meio de cultura. Nenhum composto avaliado se mostrou ativo contra a bactéria S.aureus.
The neutral complexes present the general formula [Ni(S2C=NSO2R)(Phosphine)], where R = C6H5, 4-CH3C6H5, 2-CH3C6H5, 4-FC6H5, 4-ClC6H5, 4-BrC6H5, 4-IC6H5, and Phosphine = cis- 1,2-bis(diphenylphosphine)ethylene (dppet) or triphenylphosphine (PPh3). Eight of them are new complexes. The salts have the general formula: [A] 2[Ni(S2C=NSO2R)2], where A = (PPh3Me+), (PPh3Et+), (PPh3Bu+), (PPh4+), (C4H9N+) and R= C6H5 or 4-FC6H5. Six of them are new compounds. Experiments of conductivity, melting points, electronic spectroscopy (UV-vis), vibrational spectroscopy (IR), nuclear magnetic resonance spectroscopy ( 1H and 13 C NMR), and high-resolution mass spectrometry were performed for the characterization of the compounds. The physico-chemical data are consistent with the proposed formulae. The high-resolution mass spectrometry experiment results are consistent with the expected compositions. The vibrational spectra indicate the presence of the dithiocarbimate and/or phosphine ligands. UV-vis and NMR spectra confirmed a quadratic geometry around the nickel atom. The activity of the compounds against the fungus Colletotrichum acutatum was tested using the Poison Food method. The neutral compounds containing PPh3 were very active, with lower IC50 values than bis(diethyldithiocarbamato)zinc, the active ingredient of the fungicide Ziram. The Poison Food method was not efficient to evaluate the antifungal activity of the compounds containing dppet, due to their low solubility in the aqueous medium. The salts inhibited the fungus growth from 20 to 45% at 1,0 mmol.L-1. It was not possible to obtain their IC50 values, due to precipitation of the compounds in the culture medium above this concentration. The activities against the bacteria Escherichia coli and Staphylococcus aureus was tested using the disc diffusion method. The compounds containing PPh3 were active against E. coli and were inactive against the S. aureus. As the other compounds showed no diffusion in the culture medium, their tests were inconclusive.
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Trembly, Jason. "The Effect of Coal Syn Gas Containing Hydrogen Sulfide on the Operation of a Planar Solid Oxide Fuel Cell." Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1113839002.

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Morais, Lidiane Alves de. "S?ntese, caracteriza??o e estudo das propriedades fotocatal?ticas de compostos de ni?bio em matrizes ambientais." PROGRAMA DE P?S-GRADUA??O EM QU?MICA, 2016. https://repositorio.ufrn.br/jspui/handle/123456789/21542.

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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)
Um dos materiais que atualmente est? em destaque s?o os compostos de ni?bio, por apresentarem caracter?sticas como acidez, propriedades oxidativas e fotocatal?ticas e por ser um dos metais mais abundantes do pa?s, sendo o Brasil o maior produtor mundial. Este trabalho avaliou a efici?ncia da fotocat?lise heterog?nea de materiais de ni?bio na oxida??o de metanol e na inativa??o do microrganismo Escherichia Coli. Foram sintetizados catalisadores a base de ni?bio Nb2O5 e foram feitas imobiliza??es (coating) utilizando ?xido de ni?bio. Diante das caracteriza??es, foi poss?vel verificar a forma??o de esp?cies de ?xido de ni?bio e niobatos de s?dio dependendo da metodologia de s?ntese adotada. Esses materiais foram avaliados na oxida??o de metanol em diferentes concentra??es de catalisadores e apresentaram uma efici?ncia na forma??o do formalde?do proveniente da oxida??o, esta efici?ncia est? diretamente relacionada com a concentra??o dos catalisadores, sendo o material de niobato de s?dio o que apresentou maior efici?ncia, devido as suas propriedades texturais, ?pticas, sendo este um material promissor no ramo da fotocat?lise. Para os sistemas de imobiliza??o (coating), verificou-se que o revestimento ideal ? obtido com tr?s imobiliza??es, estes materiais foram analisados na oxida??o de metanol e na inativa??o de microrganismo Escherichia Coli. Estes sistemas (coating) mostram uma boa atividade na oxida??o de metanol, apesar de apresentar resultados inferiores quando comparados aos materiais em suspens?o de ?xido de ni?bio, por?m a grande vantagem dos sistemas imobilizados em rela??o ao de suspens?es s?o a sua reutiliza??o. Em rela??o ? inativa??o da Escherichia Coli, foi verificado que os sistemas imobilizados n?o s?o muitos ativos e que o microrganismo ? bastante dependendo do meio em que se encontra.
One of the materials that is currently highlighted are the compounds of niobium, because they have features like acidity, oxidative and photocatalytic properties and for being one of the most abundant metals in the country, Brazil is the world's largest producer. In this scenario, the work has to evaluate the efficiency of heterogeneous photocatalysis niobium materials in the oxidation of methanol and the inactivation of Escherichia coli using immobilization systems ?coating? and suspension. Commercial niobium oxide (Nb2O5) was evaluated in suspension and immobilization in different systems (tubes and rings) for photocatalytic processes for water treatment (methanol oxidation and inactivation of Escherichia coli). From the results of the commercial Nb2O5 characterizations was observed the presence of an amorphous structure with heat thermal treatment at temperatures above 550 ?C becomes crystalline phases, however, this fact produce a significant aggregation of the particles which reduced the specific area and the photocatalytic activity. The not calcined Nb2O5 material showed a higher activity, for both oxidation of methanol as for the inactivation of bacterial tests, the latter being very sensitive to the chemical composition water. Immobilization of the photocatalyst reactor walls prevents the need for removal of Nb2O5 particles after treatment, but significantly reduction its activity. In contrast, immobilization in a fixed-bed (rings) led to a moderate reduction in activity, which is counteracted by improvement in the long-term stability of the material. Niobium catalysts were synthesized using a refluxing method with and without the use of NaOH in different conditions of synthesis and characterized by different techniques in order to verify the phase formation of niobium. From the results of X-ray diffraction for the synthesized materials were recorded forming of species niobium oxide and sodium niobates depending on the adopted synthesis methodology. The catalytic activity of these materials was evaluated in the oxidation of methanol in relation to the amount of catalyst in which the activities have different behaviors have been dependent on the structure, surface and morphological parameters. Materials with sodium niobate structure have a lineal tendency of activity in relation to the mass of catalysts, while the materials niobium oxide structure have an abrupt loss of their catalytic activity at higher catalyst concentrations, indicating that the dispersion of the light is higher in these catalysts as increases the amount of particles in suspension. Among the materials synthesized and analyzed in the oxidation of methanol, which was more efficient, was the material of sodium niobate NaNbO3 to their textural properties, optical, which is a promising material for photocatalysis.
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Kneeshaw, Jonathan Andrew. "The corrosion behavior of Fe-Cr-Ni alloys in complex high temperature gaseous atmospheres containing the reactants oxygen, sulphur and carbon." Thesis, Loughborough University, 1987. https://dspace.lboro.ac.uk/2134/14610.

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A systematic in-depth study has been undertaken to establish the corrosion mechanism of a Model 25Cr-35Ni-Fe alloy and four commercial alloys HP40Nb, AISI314, HP40Al and Alloy 800H in low oxygen, high sulphur and carbon containing environments typically found in coal gasification and fluidised bed combustion processes. A review of present knowledge of corrosion processes in purely oxidizing, sulphidizing and carburizing environments and multiple reactant carburizing/ oxidizing, carburizing/sulphizing and oxidizing/sulphidizing environments is given. The experimental programme was designed to establish the role of sulphur on the corrosion process by studying corrosion mechanisms in a sulphurfree H2-7%C0-1.5%H2o gas, a low sulphur H2-7%C0-1.5%H20-0.2%H 2 S gas (pS2_8= 10 bar), and a high sulphur H 2 -7%C0-1.5%H 2 0-0.6%H 2 S gas (pS = lO bar) at 800'C. All_21j_hree environments had a constant partiaf pressure of oxygen (po2 = 10 bar) and carbon activity (ac = 0.3). In the sulphur-free gas the Model alloy formed a thin uniform cr 2 o 3 layer which grew at a constant parabolic rate throughout the exposure period of 0 - 5000 hours. Surface working increased the growth rate and thickness of the Cr 2 o 3 layer but created a large number of cracks and pores which allowed carbon containing gaseous species to diffuse through the oxide to form carbide precipitates in the alloy substrata. Alloying additions of Si promoted the formation of an inner SiO layer which reduced the corrosion rate by cutting off the outward diffusion of Cr, Mn and Fe. Alloying additions of Mn promoted the formation of an additional outer (Mn, Fe )Cr 2o 4 layer. The 3. 5% Al content of the HP40Al was insufficient to form a complete Al 2 o3 layer. Alloy 800H was susceptible to localised internal oxidation. Adding a low level of sulphur (0.2% H 2 S) to the gas increased the corrosion rate of the Model alloy in the 1nitial stages. This rate gradually slowed down before becoming parabolic after 1000 - 2000 hours. This was due to the nucleation of sulphides in addition to oxides. The oxides and sulphides grew side by side until the oxides overgrew the sulphides to form a complete Cr 2o3 layer which cut off further ingress of sulphur from the gas. The entrapped sulphides promoted localized thickening of the oxide layer. Eventually the sulphur redistributed from the sulphides in the scale to internal sulphide precipitates in the alloy with the corrosion rate returning to that of the sulphur-fre,e gas for the rest of the exposure period (5000 hours total). In the commercial alloys the internal sulphide precipitates prevented the inner Si02 layer becoming complete. Sulphur doped the (Mn, Fe) Cr 2 0 4 outer layer ana the intermediate Cr 2o3 layer formed from the spinal layer, increasing the number of cation . vacancies and the growth rate of the scale. These factors caused a massive Cr depletion of the alloy substrata after several thousand hours. The internal carbides became unstable which led to a massive amount of internal attack and a dramatic increase (breakaway) in the corrosion rate. Due to its thickness and the presence of Si02 inner layer the external scale became susceptible to spallation. If this occurred the oxides and sulphides nucleated on the alloy surface again but sulphides. protective alloy. insufficient Cr was available for the oxides to overgrow the The sulphides therefore grew to form a fast growing nonsulphide scale which soon led to catastrophic failure of the Increasing the level of sulphur in the gas to 0.6% H2S caused oxides and sulphides to nucleate on the surface, but in this case the sulphides overgrew the oxides to form thick fast growing non-protective sulphide scales on all the alloys.
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Kaluarachchi, Harini. "SlyD, A Ni(II) Metallochaperone for [NiFe]-hydrogenase Biosynthesis in Escherichia coli." Thesis, 2011. http://hdl.handle.net/1807/31797.

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SlyD is a protein involved in [NiFe]-hydrogenase enzyme maturation and, together with HypB and HypA proteins, contributes to the nickel delivery step. To understand the molecular details of this in vivo function, the nickel-binding activity of SlyD was investigated in vitro. SlyD is a monomeric protein that can chelate up to 7 nickel ions with an affinity in the sub-nanomolar range. By truncation and mutagenesis studies we show that the unique C-terminal metal-binding domain of this protein is required for Ni(II) binding and that the protein coordinates this metal non-cooperatively. This activity of SlyD supports the proposed in vivo role of SlyD in nickel homeostasis. In addition to nickel, SlyD can bind a variety of other types of transition metals. Therefore it was feasible that the protein contributes to homeostasis of metals other than nickel. To test this hypothesis, the metal selectivity of the protein was examined. The preference of SlyD for the metals examined could be ordered as follows, Mn(II), Fe(II) < Co(II) < Ni(II) ~ Zn(II) << Cu(I) indicating that the affinity of SlyD for the different metals follows the Irving-Williams series of metal-complex stabilities. Although the protein is unable to overcome the large thermodynamic preference in vitro for Cu(I) and exclude Zn(II) chelation, in vivo studies suggest a Ni(II)-specific function for the protein. To understand the function of SlyD as a metallochaperone, its interaction with HypB was investigated. This investigation revealed that SlyD plays a role in Ni(II) storage in E. coli and can function as a Ni(II)-donor to HypB. This study also revealed that SlyD can modulate the metal-binding as well as the GTPase activities of HypB. Based on the experimental data, a role for the HypB-SlyD complex in [NiFe]-hydrogenase biosynthesis is presented.
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Dias, Alistair Vincent Michael. "The control and utilization of Ni(II) in Escherichia coli: The Ni(II)-specific response of NikR and the characterization of the metal-binding sites of HypB." 2009. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=968401&T=F.

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Books on the topic "NI Coil"

1

Shin Enerugi ̄ Sangyō Gijutsu Sōgō Kaihatsu Kikō (Japan). Sekitan Gigyōbu. Kaigaitan no antei kyōkyū kakuho ni mukete. Kawasaki-shi: Shin Enerugi ̄ Sangyō Gijutsu Sōgō Kaihatsu Kikō Sekitan Gigyōbu, 2009.

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Sekitan no kagaku to gijutsu: Mirai ni tsunagu enerugī. Tōkyō-to Bunkyō-ku: Koronasha, 2013.

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Nanao, Kazuaki. Tankō tarō ga kita michi: Chika ni nemuru kindai Nihon no kioku. Tōkyō: Sōshisha, 2009.

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Sentā, Furontia Tekuno. Hakaishita taisekigan no jiko shūfuku nōryoku ni kansuru kenkyū. [Sapporo-shi]: Furontia Tekuno Sentā, 2006.

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Shin Enerugī Sangyō Gijutsu Sōgō Kaihatsu Kikō (Japan). Kurīn Kōru Kaihatsu Suishinbu. Kaigaitan no antei kyōkyū kakuho to chikyū kankyō fuka no teigen ni mukete. Kawasaki-shi: Shin Enerugī Sangyō Gijutsu Sōgō Kaihatsu Kikō, 2010.

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Pangcaiguai. Bie guai ge nci "cool" rang ni jian xiao le. 2nd ed. Beijing: Shidai wenyi chubanshe, 2010.

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Gunkanjima ni mimi o sumaseba: Hashima ni kyōsei renkōsareta Chōsenjin, Chūgokujin no kiroku. Tōkyō: Shakai Hyōronsha, 2011.

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Kumiai, Nihon Tankō Rōdō. Yama ni ikite: Tanrō 40-nenshi shashinshū. Tōkyō: Nihon Tankō Rōdō Kumiai, 1990.

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Japan. Kagaku Gijutsuchō. Kenkyū Kaihatsukyoku. Shinbu saitan kuiki no suiatsu hasaihō ni yoru ijō gasu yūshutsu saigai bōshi ni kansuru kinkyū kenkyū hōkokusho. [Tokyo]: Kagaku Gijutsuchō Kenkyū Kaihatsukyoku, 1987.

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Sekiyu Tennen Gasu, Kinzoku Kōbutsu Shigen Kikō. Yunyūtan no antei kyōkyū kakuho ni mukete no sekai no sentan gijutsu no jittai oyobi dōkō chōsa: Kaigaitan kaihatsu kōdoka tō chōsa. Tōkyō-to Minato-ku: Sekiyu Tennen Gasu, Kinzoku Kōbutsu Shigen Kikō, 2014.

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Book chapters on the topic "NI Coil"

1

Takarada, Takayuki, Jing-Pei Cao, Xian-Bin Xiao, Kazuyoshi Sato, and Yukiko Ogawa. "Low Temperature Gasification of Biomass Using Ni-Loaded Brown Coal." In Cleaner Combustion and Sustainable World, 821–27. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-30445-3_110.

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Wang, Changshuai, Tingting Wang, Jianting Guo, Lanzhang Zhou, Haiping Zhao, and Songqian Xu. "Ni-Fe Based Alloy GH984G Used for 700 °C Coal-Fired Power Plants." In The Minerals, Metals & Materials Series, 143–50. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52333-0_13.

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Chen, Yu, Hongxu Li, and Peng Zhang. "The Study of Recycling Ni/Fe from Laterite by Coal Pre-Reduction and Magnetic Separation." In 5th International Symposium on High-Temperature Metallurgical Processing, 555–61. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118887998.ch69.

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Tung, David C., and John C. Lippold. "Weld Solidification Behavior of Ni-Base Superalloys for use in Advanced Supercritical Coal-Fired Power Plants." In Superalloys 2012, 563–67. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118516430.ch62.

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Li, Guanghui, Junhao Liu, Mingjun Rao, Jun Luo, Changgen Wang, and Yuanbo Zhang. "A Pilot-Plant Scale Test of Coal-Based Rotary Kiln Direct Reduction of Laterite Ore for Fe-Ni Production." In 5th International Symposium on High-Temperature Metallurgical Processing, 33–40. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118887998.ch5.

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Yagoube, Izzeldin Idris Abdalla, Taib Ibrahim, Nursyarizal Mohd Nor, and Perumal Nallagownden. "Performance of PM Linear Generator Under Various Ferromagnetic Materials for Wave Energy Conversion." In Handbook of Research on Green Engineering Techniques for Modern Manufacturing, 113–26. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-5445-5.ch007.

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This chapter examines the influence of the various ferromagnetic materials on the performance of a single-phase tubular permanent-magnet linear generator (TPMLG) for wave energy conversion. Four ferromagnetic materials were considered in this study. They are non-oriented electrical steel, Permalloy (Ni-Fe-Mn), Accucore, and Somaloy 700. The generator equipped with a tubular stator carries a single coil and employs a quasi-Halbach magnetized moving-magnet translator. Therefore, in order to obtain an accurate performance analysis, the nonlinear time-stepping finite-element analysis (FEA) technique has been used. The electromagnetic characteristics, including the magnetic field distributions, flux-linkage, winding inductance, electromagnetic force, and electromotive force (EMF) have been investigated. It is shown that a generator whose stator is fabricated from soft magnetic composite (SMC) materials has potential advantages in terms of ease of manufacture, highest force capability, lower cost, and minimum eddy-current loss.
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Newnham, Robert E. "Magnetic phenomena." In Properties of Materials. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780198520757.003.0016.

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In this chapter we deal with a number of magnetic properties and their directional dependence: pyromagnetism, magnetic susceptibility, magnetoelectricity, and piezomagnetism. In the course of dealing with these properties, two new ideas are introduced: magnetic symmetry and axial tensors. Moving electric charge generates magnetic fields and magnetization. Macroscopically, an electric current i flowing in a coil of n turns per meter produces a magnetic field H = ni amperes/meter [A/m]. On the atomic scale, magnetization arises from unpaired electron spins and unbalanced electronic orbital motion. The weber [Wb] is the basic unit of magnetic charge m. The force between two magnetic charges m1 and m2 is where r is the separation distance and μ0 (=4π×10−7 H/m) is the permeability of vacuum. In a magnetic field H, magnetic charge experiences a force F = mH [N]. North and south poles (magnetic charges) separated by a distance r create magnetic dipole moments mr [Wb m]. Magnetic dipole moments provide a convenient way of picturing the atomistic origins arising from moving electric charge. Magnetization (I) is the magnetic dipole moment per unit volume and is expressed in units of Wb m/m3 = Wb/m2. The magnetic flux density (B = I + μ0H) is also in Wb/m2 and is analogous to the electric displacement D. All materials respond to magnetic fields, producing a magnetization I = χH, and a magnetic flux density B = μH where χ is the magnetic susceptibility and μ is the magnetic permeability. Both χ and μ are in henries/m (H/m). The permeability μ = χ + μ0 and is analogous to electric permittivity. χ and μ are sometimes expressed as dimensionless quantities (x ̅ and μ ̅ and ) like the dielectric constant, where = x ̅/μ0 and = μ ̅/μ0. Other magnetic properties will be defined later in the chapter. A schematic view of the submicroscopic origins of magnetic phenomena is presented in Fig. 14.1. Most materials are diamagnetic with only a weak magnetic response induced by an applied magnetic field.
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Matsubayashi, Nobuyuki, Toshio Sato, Hiromichi Shimada, Motoyasu Imamura, Yuji Yoshimura, Akio Nishijima, Takashi Kameoka, and Koji Masuda. "Characterization of Ni-W/Al2O3 Catalyst Used in Coal Liquid Upgrading." In Coal Science, Proceedings of the Eighth International Conference on Coal Science, 1495–98. Elsevier, 1995. http://dx.doi.org/10.1016/s0167-9449(06)80090-x.

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Sandhu, S. S., G. L. Mills, and K. S. Sajwan. "Leachability of Ni, Cd, Cr, and As from Coal Ash Impoundments of Different Ages on the Savannah River Site." In Trace Elements in Coal and Coal Combustion Residues, 165–82. CRC Press, 2020. http://dx.doi.org/10.1201/9781003070139-12.

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Zinke, Manuela, Stefan Burger, and Sven Juettner. "Properties of Additively Manufactured Deposits of Alloy 718 Using CMT Process Depending on Wire Batch and Shielding Gas." In Welding Principles and Application [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.102455.

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Wire + arc additive manufacturing (WAAM®) is a versatile, low-cost, energy-efficient technology used in metal additive manufacturing (AM). This process uses arc welding to melt a wire and form a three-dimensional (3D) object using a layer-by-layer deposit. In the present study, the effect of heat input and shielding gas during CMT-WAAM welding on cooling time, mechanical properties at room temperature, and macro- and microstructure was investigated based on different part geometries (wall, block) using two S Ni 7718 wire batches. The heat input and consequently the cooling rate were varied by changing the wire feed and the travel speed. As expected, increasing the heat input leads to higher cooling times. Due to the 2D-heat conduction, the thin walls cool significantly slower than the multi-pass block welds. Nevertheless, the influence on mechanical properties is only marginal. Both the AM batch of S Ni 7718 with the lower Nb/C and the multi-pass block welds with the higher thermomechanical reactions exhibit a high susceptibility to unacceptable seam defects, such as hot cracks or lacks of fusion. But even the standard batch causes hot cracks. An influence of the shielding gas on microstructure, mechanical properties, and occurrence of the seam defects cannot be detected.
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Conference papers on the topic "NI Coil"

1

Chen, Y. C., Wei-Ting Liu, Tzu-Yuan Chao, and Y. T. Cheng. "An optimized Cu-Ni nanocomposite coil for low-power electromagnetic microspeaker fabrication." In TRANSDUCERS 2009 - 2009 International Solid-State Sensors, Actuators and Microsystems Conference. IEEE, 2009. http://dx.doi.org/10.1109/sensor.2009.5285572.

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Sinha, R., and M. L. Nagurka. "Analog and LabView-Based Control of a Maglev System With NI-ELVIS." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81600.

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This paper investigates the control of a low cost vertical-axis maglev system for mechatronics and controls education. The tabletop maglev system consists of an electromagnetic coil that levitates a ferrous object using an infrared sensor to determine the object’s position. Based on the sensor output, the controller adjusts the coil current, thus changing the magnetic field controlling the levitated object’s position. A second electromagnetic coil is used to provide known disturbances. The paper develops the underlying theory for magnetic levitation and presents the results of experiments with classical controllers implemented both as analog circuits and in software-based virtual instruments. Analog controllers, such as PID-type controllers, were implemented as simple circuits on National Instruments’ Educational Laboratory Virtual Instrumentation Suite (NI-ELVIS) prototyping board. NI-ELVIS offers a LabVIEW-based prototyping environment for readily experimenting with different controller circuits. It consists of a multi-function data acquisition device and a custom-designed bench-top workstation with a prototyping board. In addition to analog control circuits, a suite of LabVIEW-based controllers were developed which offer in software a rapid way to change control strategies and gains and explore the effect on the physical system.
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Yusoff, Siti Hajar, Nadia Nazieha Nanda, Nur Shahida Midi, and Ahmed Samir Abed Badawi. "Mathematical Design of Coil Parameter for Wireless Power Transfer using NI Multisims Software." In 2021 8th International Conference on Computer and Communication Engineering (ICCCE). IEEE, 2021. http://dx.doi.org/10.1109/iccce50029.2021.9467166.

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4

Pan, C. T., S. C. Shen, and H. P. Chou. "Design and Fabrication of High Power Electromagnetic Microactuator With Perpendicular Magnetic Anisotropy." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/mems-23827.

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Abstract A novel microactuator has presented by this research. The high power electromagnetic microactuator combines of innovative hard magnetic Fe/Pt process, high Ni/Fe permalloy magnetic circuit design technique, bulk micromachining and excimer laser ablation. The hard magnetic material is Fe/Pt which is deposited under low temperature by sputter on the suspension diaphragm to offer perpendicular magnetic anisotropy field. The magnetic circuit with close loop is applied to concentrate the magnetic flux and increases magnetic force. Therefore, the magnetic field induced by the magnetic field of the planar coil and Ni/Fe permalloy can be enhanced, which will interact with Fe/Pt and induce huge displacement, large force output and high frequency. The high power electromagnetic microactuator has been demonstrated magnetic force 2 times larger than conventional magnetic microactuator.
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Potnuru, Akshay, and Yonas Tadesse. "Synthesis and Characterization of Hybrid Actuator Based on Polypyrrole and SMA." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-39125.

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This paper presents initial investigation on a hybrid artificial muscle actuator combining two actuation technologies, based on conductive polymers and shape memory alloys (SMAs). Polypyrrole is used as the conductive polymer muscle and nickel-titanium as shape memory alloy to make the composite muscle system. Depending on the geometry of the actuator, doped polypyrrole exhibits large strain, consuming less voltage and current; whereas shape memory alloy generates large stress (force), consuming high power (high current). Helically wound coil structure was chosen as the shape of the composite actuator in this study. The polypyrrole is synthesized on the surface of the Ni-Ti shape memory alloy wire, wound around a core gold coated polylactide fiber (PLA). Preliminary results on the performance and synthesis conditions of the composite actuator will be presented for various applications under different conditions.
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Yamamoto, Hidetake. "Development of Minimal Invasive SMA Multi-Transducer Unit for Blood Analysis or Drug Delivery." In ASME 2010 5th Frontiers in Biomedical Devices Conference. American Society of Mechanical Engineers, 2010. http://dx.doi.org/10.1115/biomed2010-32008.

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This research purpose is to develop minimal medical units applying heated actuations of the Shape Memory Alloy (SMA) transducers using the medical Ti-Ni material, in order to enable minimal hypodermic invasive microvolume either blood suction or drug delivery by equipping nontoxic and minimal edged microneedle to be created in my laboratory. I have focused on lymphocytes for immunotoxin and erythrocytes for glucose level in blood. This paper has reported double-action mechanisms of the compact unit in originally developing and its actions by low DC inputs. The Joule’s heating of the SMA coil spring transducer might be useful for indenting blood vessels whose diameter was larger than the microneedle because of generating indentation stroke of 2 mm and recovery force of 0.25 N 0.6 s later from heating when applied DC 2 V and 0.5 A. When applied DC 1.5 V and 2 A, the octagonal-pyramidal foil transducer for blood suction recovered as plane condition as before octagonal-pyramidal forming 8 s later from heating.
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O’Dwyer, Paul, Athanasios Tazedakis, and Peter Boothby. "Technical Challenges of Heavy Wall HFW Pipe Production for Bord Ga´is E´ireann Pipeline Project." In 2010 8th International Pipeline Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ipc2010-31293.

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The recently constructed Bord Ga´is E´ireann, Curraleigh West to Midleton pipeline runs due north from the Midleton compressor station near the city of Cork in Southern Ireland. The 47.5 km, 610mm outside diameter pipeline, comprises over 30 km of 9.5 mm and 17 km of 19.1 mm wall thickness L450MB (X65) grade pipe. The pipe for the project was produced by Corinth Pipeworks (CPW), at its state of the art HFW pipe mill at Thisvi, Greece and represents a first in terms of the quantity of 19.1 mm L450MB (X65) HFW pipe produced by the mill for a specific project. The paper outlines the engineering approach adopted for the pipeline before describing in detail the production challenges faced by the pipe mill in successfully completing this demanding pipe order. Production of the 9.5 mm wall thickness pipe was not anticipated to present any particular difficulties. However, the principal concern associated with the manufacture of the 19.1 mm pipe was that the combination of wall thickness and strength level was toward the upper end of the commercially supplied wall thickness-strength combinations for HFW produced linepipe, particularly as the actual strength of the starting coil was well above the minimum specified level for L450MB (X65). In addition, to accommodate the demanding drop weight tear test (DWTT) toughness requirement the chemical composition of the 19.1 mm coil strip was above the permitted limits of the parent pipe standard EN 10208-2 [1] for the elements Cu & Ni, and the yield to tensile ratio was also above the 0.87 maximum level required by EN 10208-2 for L450MB (X65) grade pipe. Potential risks were therefore identified prior to production and mitigated by several methods detailed in the paper, including for example; increased initial production test frequency, close monitoring during pipe production, duplicate testing to verify mill results, identification of potential construction issues and weldability testing. A summary of production experience including statistical data for the production of both 9.5 mm and 19.1 mm pipe is presented. Also covered are the results of a supplementary investigation which makes a further assessment of the influence of the welding and heat treatment cycles on the final pipe properties. The paper concludes by referring to the overall successful construction phase of the project.
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Liebeherr, Martin, Özlem E. Güngör, Nuria Sanchez, Hervé Luccioni, and Nenad Ilic. "Recommendations for Submerged Arc Spiral Welding With Optimized CTOD Properties." In 2018 12th International Pipeline Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/ipc2018-78518.

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Many pipe mills may not be familiar with a Crack Tip Opening Displacement (CTOD) requirement on the pipe seam weld, nor will they find easily relevant information in open literature. Influencing — and certainly not independent — factors are: welding parameters, base material and consumable selection. Out of these, the welding parameters such as heat input and cooling rate cannot be varied over a wide range during the pipe production, which means that the leverage is rather limited at the given welding process. The properties of the heat affected zone will be mainly affected by the base material, while the properties of the weld metal will be affected by both, base material and filler wire selection. In particular with respect to the weld metal properties it will be difficult to obtain general quantitative information. For example, a welding consumable supplier will readily provide the properties of the filler wires but would be unable to predict the changes caused by the dilution from any base material in the weld pool and specific welding procedures that may have been used. To support the pipe mills in the selection of the consumables for submerged arc welding, an experimental program was launched with the aim to provide recommendations on how to optimize CTOD toughness of the spiral weld seam. For this, a large number of welds were produced on 20 mm thick X70 coil samples, with eight different filler wire combinations, using a 2-wire (tandem) set-up for both the inside and outside weld. Welding parameters were kept constant. The welding program was applied to two different X70 steels to determine a potential influence of the micro-alloying elements, particularly Nb. The results show clearly that a careful consumable selection is required for obtaining acceptable CTOD toughness in the weld metal. Ni-Mo and Ti-B additions to the weld metal are found to be beneficial with both steel concepts. Mo addition alone both to the ID and OD welds was clearly not a suitable selection.
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9

Lamy, Julien, and Ronald M. Summers. "Intra-patient colon surface registration based on t ni coli." In Medical Imaging, edited by Maryellen L. Giger and Nico Karssemeijer. SPIE, 2007. http://dx.doi.org/10.1117/12.709780.

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10

Xu, Chunchuan, John W. Zondlo, and Edward M. Sabolsky. "Exploring Remedies for PH3 Poisoning of a Ni-YSZ Anode in Coal-Syngas Fuel." In ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology collocated with ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/fuelcell2011-54622.

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Ni-YSZ cermet is commonly used as the anode of a solid oxide fuel cell (SOFC) because it has excellent electrochemical performance and is a cost effective anode material for coal-syngas fuel. However, coal-syngas contains trace contaminants, such as phosphine (PH3), hydrogen sulfur (H2S), arsine (AsH3) and stibine (SbH3), and these can cause degradation of the SOFC. Ni-YSZ anode-supported SOFCs were exposed to syngas and H2 fuel, while co-feeding PH3 and chlorine Cl2 impurities under a constant current load at 800°C. The cell degradation was postponed in syngas and highly mitigated in H2. In another test, a Ni-based filter was used to remove the PH3 impurity. The results show that the filter can effectively remove 20 ppm PH3 to a level which does not significantly degrade the SOFC over 400 h. The poisoning effects were evaluated by current-voltage scans and impedance spectroscopy, in addition to thermodynamic and chemical analyses. The post-mortem analyses of the cell and filter were performed by means of XRD and SEM/EDS.
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Reports on the topic "NI Coil"

1

Kim, Kwang Joo. Optical properties and electronic structures of d- and f-electron metals and alloys, Ag-In, Ni-Cu, AuGa sub 2 , PtGa sub 2 ,. beta. prime -NiAl,. beta. prime -CoAl, CeSn sub 3 , and LaSn sub 3. Office of Scientific and Technical Information (OSTI), October 1990. http://dx.doi.org/10.2172/6767519.

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