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Artículos de revistas sobre el tema "Catalyseur à base de Ni"

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Autor: Grafiati

Publicado: 25 de mayo de 2024

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1

Bachari, Khaldoun, Rabah Bouarab y Ouiza Chérifi. "Production d’Hydrogène via le Procédé Catalytique CH4 + CO2". Journal of Renewable Energies 4, n.º 2 (31 de diciembre de 2001): 101–5. http://dx.doi.org/10.54966/jreen.v4i2.1002.

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La réaction de reformage du méthane par le CO2 en gaz de synthèse (H2, CO) a été étudiée sur catalyseurs à base de nickel, cobalt et de terres rares supportés. Les solides catalytiques ont été préparés par imprégnation sèche et caractérisés par absorption atomique et par la diffraction des rayons-X. La production d’hydrogène est remarquablement influencée par la nature de la phase métallique et des supports utilisés. L’ordre décroissent des conversions de CO2 et de CH4 ainsi que la production d’hydrogène des catalyseurs supportés sur silice est : Ru, Ni, Rh, Pt, Co. En revanche, l’activité des catalyseurs supportés sur l’alumine suit la séquence suivante : Rh , Ru, Pt.

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2

Wang, Guohong, Min Li, Wenmin Pang, Min Chen y Chen Tan. "Lewis acids in situ modulate pyridazine-imine Ni catalysed ethylene (co)polymerisation". New Journal of Chemistry 43, n.º 34 (2019): 13630–34. http://dx.doi.org/10.1039/c9nj01243e.

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The Lewis acid-base interaction between B(iii) Lewis acids and the pyridazine moiety reduced the electron density from the Ni center and in situ modulated the pyridazine-imine nickel catalyzed ethylene (co)polymerisation.

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3

Bhat, Pooja B. y Badekai Ramachandra Bhat. "An immobilised Co(ii) and Ni(ii) Schiff base magnetic nanocatalyst via a click reaction: a greener approach for alcohol oxidation". New Journal of Chemistry 39, n.º 6 (2015): 4933–38. http://dx.doi.org/10.1039/c5nj00218d.

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A Schiff base immobilised magnetic nanocatalyst synthesized via copper catalysed alkyne azide cycloaddition (CuAAC) exhibited a strong interaction and improved yielding for oxidation of alcohols in a solventless system.

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4

Mohanty, Anuradha y Sujit Roy. "Glaser–Hay hetero-coupling in a bimetallic regime: a Ni(ii)/Ag(i) assisted base, ligand and additive free route to selective unsymmetrical 1,3-diynes". Chemical Communications 53, n.º 78 (2017): 10796–99. http://dx.doi.org/10.1039/c7cc05605b.

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5

Kureshy, R. I., N. H. Khan, S. H. R. Abdi, S. T. Patel, P. Iyer, E. Suresh y P. Dastidar. "Chiral Ni(II) Schiff base complex-catalysed enantioselective epoxidation of prochiral non-functionalised alkenes". Journal of Molecular Catalysis A: Chemical 160, n.º 2 (octubre de 2000): 217–27. http://dx.doi.org/10.1016/s1381-1169(00)00213-2.

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6

Chatterjee, D. "Olefin epoxidation catalysed by Schiff-base complexes of Mn and Ni in heterogenised-homogeneous systems". Journal of Molecular Catalysis A: Chemical 144, n.º 2 (5 de julio de 1999): 363–67. http://dx.doi.org/10.1016/s1381-1169(99)00093-x.

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7

MIRILĂ, DIANA-CARMEN y DENISA-ILEANA NISTOR. "Oxidative study of Acid Yellow 23 using K10-Montmorillonite chemically modified". Journal of Engineering Sciences and Innovation 6, n.º 2 (17 de mayo de 2021): 159–74. http://dx.doi.org/10.56958/jesi.2021.6.2.6.

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Catalytic ozonation of the azo dye Acid Yellow 23 was investigated in the presence of Montmorillonite K10 and its chemically modified counterpart with Cobalt and Nickel (Co-Ni-K10). The material thus obtained were characterized by BET, XRD and TGA analysis. The effects of different variables were studied, such as: catalyst dose, ozone dose, ozonation time and pH. Clay-catalysed reactions are strongly dependent on the adsorption of the reactant, which in turn should depend on acid-base, electrostatic and hydrophilic-organophilic interactions. The basicity of the clay catalyst surface is expected to favour the interactions with the acidic groups of the studied organic molecule. The interactions involved in adsorption are determined by the pKa values of each group in each organic molecule.

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8

Patel, Asha D., Rignesh S. Patel y Ganpat R. Patel. "Coordination Polymers ofN,Nʼ-di-(8-Hydroxyquinolinolyl- 5-methyl)-N,N-diethyl-1,3-propane diamine (QEPD)". E-Journal of Chemistry 7, n.º 3 (2010): 1023–28. http://dx.doi.org/10.1155/2010/609494.

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Coordination polymers containing a novel bis(oxine) bidentate ligand, namelyN,Nʼ-di(8-hydroxyquinolinolyl-5-methyl)-N,Nʼ-diethyl-1,3-propane diamine (QEPD) have been prepared with the metal ions Zn(II), Cu(II), Ni(II), Co(II) and Mn(II). The novel bis-(bidentate) ligand was synthesized by condensation of 5-chloromethyl-8-hydroxyquinoline hydrochloride withN,Nʼ-diethyl-1,2- propane diamine in the presence of a base catalyses. All of these coordination polymers and the parent ligand were characterized by elemental analyses, IR spectral and diffuse reflectance spectral studies. The thermal stability and number- average molecular weights (Mn¯) of all of the coordination polymers were determined by thermogravimetric analyses and non-aqueous conductometric titrations, respectively. In addition, all of the coordination polymers have been characterized by their magnetic susceptibilities.

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9

Godha, Neha y Suresh C. Ameta. "Use of Some Metalferrites as Catalyst in Benzil-Benzilicacid Rearrangement Reaction". Asian Journal of Chemical Sciences 13, n.º 4 (18 de julio de 2023): 18–25. http://dx.doi.org/10.9734/ajocs/2023/v13i4246.

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Magnesium ferrite was used to catalyse the Benzil-Benzilic acid rearrangement reaction of 1,2-rearrangement of 1,2-diketones to α-hydroxy carboxylic acids in presence of a base. Magnesium ferrite was prepared by hydrothermal process. It was characterized by Field Emission Scanning Electron Microscopy (FESEM), X-Ray Diffraction Spectroscopy (XRD), and Energy Dispersive X-Ray Spectroscopy (EDX). The crystalline size of magnesium ferrite was found to have 82.47nm and these are irregular in shape. It was found that the yield of the product (benzilic acid) in the presence of Mg ferrite was 81.6%, which is almost 2.3 times the yield obtained in the absence of catalyst. A comparative study was made with different metal ferrites as catalyst and it was found that the activity of metal ferrites followed the order: MgFe2O4 > Cu Fe2O4 > Ni Fe2O4 > Co Fe2O4 > Zn Fe2O4

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10

Carr, Stephen B., Rhiannon M. Evans, Emily J. Brooke, Sara A. M. Wehlin, Elena Nomerotskaia, Frank Sargent, Fraser A. Armstrong y Simon E. V. Phillips. "Hydrogen activation by [NiFe]-hydrogenases". Biochemical Society Transactions 44, n.º 3 (9 de junio de 2016): 863–68. http://dx.doi.org/10.1042/bst20160031.

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Hydrogenase-1 (Hyd-1) from Escherichia coli is a membrane-bound enzyme that catalyses the reversible oxidation of molecular H2. The active site contains one Fe and one Ni atom and several conserved amino acids including an arginine (Arg509), which interacts with two conserved aspartate residues (Asp118 and Asp574) forming an outer shell canopy over the metals. There is also a highly conserved glutamate (Glu28) positioned on the opposite side of the active site to the canopy. The mechanism of hydrogen activation has been dissected by site-directed mutagenesis to identify the catalytic base responsible for splitting molecular hydrogen and possible proton transfer pathways to/from the active site. Previous reported attempts to mutate residues in the canopy were unsuccessful, leading to an assumption of a purely structural role. Recent discoveries, however, suggest a catalytic requirement, for example replacing the arginine with lysine (R509K) leaves the structure virtually unchanged, but catalytic activity falls by more than 100-fold. Variants containing amino acid substitutions at either or both, aspartates retain significant activity. We now propose a new mechanism: heterolytic H2 cleavage is via a mechanism akin to that of a frustrated Lewis pair (FLP), where H2 is polarized by simultaneous binding to the metal(s) (the acid) and a nitrogen from Arg509 (the base).

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11

Hay, Robert W. y Chen You-Quan. "Base catalysed isomerisation of cis-[Ni(cyclam)(OH2)2]2+ in strongly basic solution. Evidence for an intramolecular isomerisation process". Inorganica Chimica Acta 180, n.º 2 (febrero de 1991): 147–49. http://dx.doi.org/10.1016/s0020-1693(00)84924-5.

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12

Kaksonen, Anna H., Christina Morris, Felipe Hilario, Suzy Rea, Jian Li, Kayley Usher, Jason Wylie, Maneesha P. Ginige, Ka Yu Cheng y Chris du Plessis. "Two-Stage Airlift Bioreactor System for Efficient Iron Oxidation and Jarosite Precipitation". Advanced Materials Research 825 (octubre de 2013): 242–45. http://dx.doi.org/10.4028/www.scientific.net/amr.825.242.

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Continuous high-rate iron oxidation and removal of jarosite precipitates from solution at low pH and ambient temperature and pressure was successfully demonstrated. The bio-catalysed iron oxidation and jarosite precipitation is promising as a unit process for a variety of hydrometallurgical process flow sheets, where it allows for iron removal from ferrous solutions without the requirement for chemical addition and with negligible base metal co-precipitation losses. The process demonstrated performance that could be used in a large scale industry unit. A two-stage airlift bioreactor (ALBR) system comprised of two ALBRs, each with its own settler, was operated for iron oxidation and precipitation at room temperature with a mixed culture of mesophilic iron oxidisers. The two-stage reactor design allowed for optimization of overall reactor kinetics by facilitating the growth of low (430 mV vs Ag/AgCl) and high (517 mV) redox potential iron oxidizers in the respective reactors. The influent (pH 1.5) contained (g L-1) 15 Fe2+, 1.5 Cu, 1.5 Ni, nutrients and trace elements. The hydraulic retention time (HRT) was decreased stepwise to evaluate process performance. With the lowest HRTs (8 h in ALBR1 and 10 h in ALBR2), the overall iron oxidation and precipitation rates of the two-stage system were 0.75 ± 0.02 g L-1 h-1 and 0.15 ± 0.01 g L-1 h-1, respectively and overall iron oxidation and precipitation efficiencies of 94 ± 3% and 18 ± 1 %, respectively. The percent of influent Fe, S, Cu and Ni removed as precipitates from settlers were 30.9%, 16.7%, 1.1% and 0.2%, respectively. The precipitates were predominately comprised of (>95%) jarosite with potassium jarosite being the dominant form, followed by hydronium, ammonium and sodium jarosites. In conclusion, the two-stage ALBR system allowed efficient iron oxidation and precipitation of the oxidised iron as well settling jarosite with only minor loss of Cu and Ni via co-precipitation.

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13

Yang, Bin, Jianping Li, Lianming Zhang y Guobao Xu. "A molecularly imprinted electrochemiluminescence sensor based on the mimetic enzyme catalytic effect for ultra-trace Ni2+ determination". Analyst 141, n.º 20 (2016): 5822–28. http://dx.doi.org/10.1039/c6an00926c.

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The complex of Ni-DMG acts as the template molecule modified on the MIP electrode surface. As a mimetic enzyme, it catalyses the oxidation of luminol to enhance the ECL signal. The ECL intensities produced by the luminol-H₂O₂ ECL system provide the basis for Ni²⁺ determination.

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14

Ajaykamal, Tamilarasan, Mitu Sharma, Nasreen S. Islam y Mallayan Palaniandavar. "Rapid atmospheric carbon dioxide fixation by nickel(ii) complexes: meridionally coordinated diazepane-based 3N ligands facilitate fixation". Dalton Transactions 50, n.º 23 (2021): 8045–56. http://dx.doi.org/10.1039/d1dt00299f.

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In basic methanol solution, [Ni(3N)(H₂O)₃]²⁺1, where 3N is a meridionally coordinated ligand, absorbs atmospheric CO₂ rapidly to produce 3, [Ni₂(3N)₂(μ-CO₃)(H₂O)₂](ClO₄)₂. 3 catalyses the conversion of styrene epoxide into cyclic carbonate.

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15

Tan, Ru Shien, Afizah Alir, Saiful Azam Mohamad, Khairuddin Md Isa y Tuan Amran Tuan Abdullah. "Ni-based catalysts for steam reforming of tar model derived from biomass gasification". E3S Web of Conferences 90 (2019): 01015. http://dx.doi.org/10.1051/e3sconf/20199001015.

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Tar formation during biomass gasification is a major barrier to utilise the produced syngas, which clogs processing equipment. In the present study, steam reforming of gasification-derived tar (phenol, toluene, naphthalene, and pyrene) was catalysed by Ni/dolomite, Ni/dolomite/Al2O3, Ni/dolomite/La2O3, Ni/dolomite/CeO2, and Ni/dolomite/ZrO2 for hydrogen production. The steam reforming experiment was conducted in a fixed bed reactor at 700 °C and the steam-to-carbon molar ratio of 1 under atmospheric pressure. After the catalytic test, the spent catalysts were characterised by thermogravimetric analysis and variable-pressure scanning electron microscope. The aim of this study is to investigate the catalytic activity of Ni-based catalysts in terms of tar conversion and their deactivation characteristic. The current results revealed that all the catalysts showed almost full conversion of tar (98.8%-99.9%) and considerably low amount of coke deposited in the form of amorphous and filamentous carbon (15.9-178.5 mg gcat-1). Among the catalysts studied, Ni/dolomite/La2O3 gave the highest catalytic activity for steam reforming of gasified biomass tar and lowest coke formation.

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16

Geffray, Christian y Mögens Pedersen. "Nampula en guerre". Politique africaine 29, n.º 1 (1988): 28–40. http://dx.doi.org/10.3406/polaf.1988.5154.

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Comment la guérilla pro-sud-africaine est-elle parvenue à bénéficier d’une certaine base sociale ? Grâce à une étude de cas (district du Eráti de la province de Nampula), on perçoit le caractère explosif de la conjonction de deux facteurs : d’une part un processus de différenciation sociale et interlignagère provoqué par la politique de villagisation, cause de crise sociale et de mécontentement parmi des couches disparates de la population (jeunes villageois, notables lignagers); d’autre part, l’aspect catalyseur de l’introduction d’armes, dans ce contexte, par une infrastructure de guérilla.

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17

Baalala, M., T. Becue, J. Leglise, J. M. Manoli, J. N. M. van Gestel, J. Lamotte, M. Bensitel, J. M. Goupil y D. Cornet. "Catalyseur d'hydrocraquage à base de sulfure de NiMo déposé sur une zéolithe HEMT modifiée". Journal de Chimie Physique et de Physico-Chimie Biologique 96, n.º 2 (febrero de 1999): 290–302. http://dx.doi.org/10.1051/jcp:1999137.

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18

YAMANAKA, Akihiro y Hiroyuki ICHIHASI. "Microsegregation in Ni Base Alloy". Tetsu-to-Hagane 75, n.º 3 (1989): 446–53. http://dx.doi.org/10.2355/tetsutohagane1955.75.3_446.

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19

Kim, Jong Jip y Seng Mun Cho. "Hot corrosion resistance of Ni and Ni-base superalloys". Journal of Materials Science Letters 15, n.º 1 (enero de 1996): 19–22. http://dx.doi.org/10.1007/bf01855598.

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20

Miyazaki, Shuichi y Hee Young Kim. "TiNi-Base and Ti-Base Shape Memory Alloys". Materials Science Forum 561-565 (octubre de 2007): 5–21. http://dx.doi.org/10.4028/www.scientific.net/msf.561-565.5.

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The basic characteristics of TiNi-based and Ni-free Ti-based shape memory alloys are reviewed. They include the crystal structures of the parent and martensite phases in both the alloys, the recoverable strain associated with the martensitic transformation, the transformation temperatures, the temperature and orientation dependence of deformation behavior, etc. The sputter-deposited Ti-Ni thin films are also reviewed briefly because of their possibility of expanding into micromechanical system applications as the most powerful microactuator.

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21

Podhorná, Božena, Irena Andršová, Jana Dobrovská, Vlastimil Vodárek y Karel Hrbáček. "Structure Stability of Ni-Base and Co-Base Alloys". Materials Science Forum 782 (abril de 2014): 431–36. http://dx.doi.org/10.4028/www.scientific.net/msf.782.431.

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This article summarises results of structure stability investigation of cast Ni-base and Co-base alloys after prolonged high temperature exposure at 900-1100 °C. Cast Ni (Co)-Cr-W-C alloys are resistant to high-temperature corrosion, due to high chromium content. Their heat resistance is caused by presence of carbides, which are stable at very high temperatures. Carbides precipitate in shape of large plate-like particles or carbide eutectics at casting cell boundaries, thus forming carbide skeleton of the alloy. Carbide morphology and temperature stability depends on chemical composition of the alloy, e.g. carbide content, type and content of carbide-forming elements. Microstructure changes were evaluated by stereological analysis and X ray-spectral microanalysis.

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22

Kim, Taek-Soo, Jae-Young Ryu, Jin-Kyu Lee y Jung-Chan Bae. "Synthesis of Cu-base/Ni-base amorphous powder composites". Materials Science and Engineering: A 449-451 (marzo de 2007): 804–8. http://dx.doi.org/10.1016/j.msea.2006.02.335.

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23

Kajikawa, Koji, Takeshi Sato y Hitohisa Yamada. "Freckle Formation in Ni-base Superalloys". Tetsu-to-Hagane 95, n.º 8 (2009): 613–19. http://dx.doi.org/10.2355/tetsutohagane.95.613.

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24

Gorgannejad, Sanam, Ernesto A. Estrada Rodas y Richard W. Neu. "Ageing kinetics of Ni-base superalloys". Materials at High Temperatures 33, n.º 4-5 (9 de mayo de 2016): 291–300. http://dx.doi.org/10.1080/09603409.2016.1176753.

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25

Yamazaki, Michio. "Design and development of Ni-base and Ti-base alloys." Bulletin of the Japan Institute of Metals 29, n.º 1 (1990): 36–42. http://dx.doi.org/10.2320/materia1962.29.36.

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26

Bensaddik, A., B. Ernst, F. Garin, G. Maire y A. Kiennemann. "Etude in situ par EXAFS de la réductibilité d'un catalyseur Fischer-Tropsch à base de cobalt supporté sur silice". Le Journal de Physique IV 06, n.º C4 (julio de 1996): C4–545—C4–552. http://dx.doi.org/10.1051/jp4:1996451.

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27

Liang, Zhiyuan y Qinxin Zhao. "High temperature oxidation of Fe–Ni-base alloy HR120 and Ni-base alloy HAYNES 282 in steam". Materials at High Temperatures 36, n.º 1 (27 de abril de 2018): 87–96. http://dx.doi.org/10.1080/09603409.2018.1465712.

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28

Bi, Xiao Fang y Kazuhiro S. Goto. "High Temperature Oxidation Behaviours of Ni-base and Co-base Superalloys". Journal of the Japan Institute of Metals 51, n.º 11 (1987): 1060–68. http://dx.doi.org/10.2320/jinstmet1952.51.11_1060.

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29

Zhang, Lin-Yang, Ping Shen, Yan Qi y Qi-Chuan Jiang. "Wettability in reactive Sn-base alloy/Ni-base metallic glass systems". Applied Surface Science 276 (julio de 2013): 424–32. http://dx.doi.org/10.1016/j.apsusc.2013.03.110.

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30

Pippel, E., J. Woltersdorf y R. Schneider. "Micromechanisms of metal dusting on Fe-base and Ni-base alloys". Materials and Corrosion 49, n.º 5 (mayo de 1998): 309–16. http://dx.doi.org/10.1002/(sici)1521-4176(199805)49:5<309::aid-maco309>3.0.co;2-1.

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31

Janik-Czachor, M. "Passivity of Fe-Ni base amorphous alloys." ISIJ International 31, n.º 2 (1991): 149–53. http://dx.doi.org/10.2355/isijinternational.31.149.

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32

Kunz, Ludvík, Petr Lukáš y Radomila Konečná. "Combined Cycle Fatigue of Ni-Base Superalloy". Key Engineering Materials 465 (enero de 2011): 523–26. http://dx.doi.org/10.4028/www.scientific.net/kem.465.523.

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Fatigue life of a cast Ni-base superalloy IN 713LC under combined cycle loading consisting of a superposition of low- and high-cycle fatigue at 800 °C was experimentally determined. No measurable effect of combined cycle was found for studied loading conditions. High scatter of fatigue life related to the initiation of cracks on casting defects was observed. Size of the largest defect in a specimen was predicted by the largest extreme value distribution method. The predicted size was compared with fractographic observation of defects resulting in final fatigue failure.

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33

Zhu, X., T. Zhang, D. Marchant y V. Morris. "Combustion Synthesis of Ni/Al Base Composites". Advanced Materials Research 545 (julio de 2012): 50–55. http://dx.doi.org/10.4028/www.scientific.net/amr.545.50.

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This paper presents a new ignition technique to synthesize NiAl based composites using high frequency induction heating to ignite the combustion reaction. A high resolution thermal imaging camera and two infrared thermometers were used to monitor the complete temperature profiles during synthesis. Thermodynamic calculations were performed to predict the combustion temperature and the effect of preheating temperatures. The results show that the combustion reaction for Ni/Al based composites can be ignited using a high frequency induction heater. High density, multi layer TiC-NiAl composites can be produced using this method, but to ignite the combustion reaction by induction heating for the Ni/Al+Ti/C system, there is a limit for the content of Ti/C, above which the ignition will not start. Ultra fine TiC was synthesized using this technique.

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34

Huang, S. C., E. L. Hall y M. F. X. Gigliotti. "Rapidly solidified Al3Ti-base alloys containing Ni". Journal of Materials Research 3, n.º 1 (febrero de 1988): 1–7. http://dx.doi.org/10.1557/jmr.1988.0001.

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Two Ni-modified Al3Ti alloys (Al65Ni10Ti25 and Al62Ni8Ti30) were rapidly solidified by melt spinning. The resulting microstructure was studied using light microscopy and analytical electron microscopy. Significant variations in the microstructure and phases were observed between the two ribbons and through the thickness of each ribbon.A single-phase γ-TiAl structure was seen near the wheel side of the Al62Ni8Ti30 ribbon, having microcrystalline grains ∼ 100 nm in diameter. Second-phase particles of Λ-AlNiTi were found in the remaining regions of that ribbon as the structure became columnar due to reduced rates of cooling. The Al65Ni10Ti25 alloy exhibited a primary phase of π-Al6.5 NiTi2.5. A second phase of μ-Al2NiTi formed with morphology and distribution varying through thickness. Microchemistry measurements on the phases indicated substantial deviations (up to 14 at. %) from the stoichiometric compositions. Further, the π, γ, and μ are low-temperature phases that do not form by solidification under equilibrium conditions. The observation of these phases thus suggests significant undercoolings achieved during the melt-spinning processing of the present alloys. Both ribbons are brittle as spun.

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35

CHEN, Qiang, Norio KAWAGOISHI, Hironobu NISITANI, Ken-ichi OTSUBO, Qingyuan WANG y Eiji KONDO. "Ultrasonic Fatigue Properties of Ni-Base Superalloy." Transactions of the Japan Society of Mechanical Engineers Series A 69, n.º 679 (2003): 626–32. http://dx.doi.org/10.1299/kikaia.69.626.

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36

Li, Weimin y Sindo Kou. "Ni-base superalloy rods pulled from melts". Journal of Crystal Growth 177, n.º 1-2 (mayo de 1997): 140–44. http://dx.doi.org/10.1016/s0022-0248(96)00850-0.

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37

Felicelli, S. D., D. R. Poirier y J. C. Heinrich. "Macrosegregation patterns in multicomponent Ni-base alloys". Journal of Crystal Growth 177, n.º 1-2 (mayo de 1997): 145–61. http://dx.doi.org/10.1016/s0022-0248(96)01069-x.

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38

Lian, K., D. W. Kirk y S. J. Thorpe. "Electrocatalytic behaviour of Ni-base amorphous alloys". Electrochimica Acta 36, n.º 3-4 (enero de 1991): 537–45. http://dx.doi.org/10.1016/0013-4686(91)85138-w.

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39

Tawancy, H. M., N. M. Abbas, A. I. Al-Mana y T. N. Rhys-Jones. "Thermal stability of advanced Ni-base superalloys". Journal of Materials Science 29, n.º 9 (mayo de 1994): 2445–58. http://dx.doi.org/10.1007/bf00363439.

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40

Hong, N. M., H. Michor, M. Vybornov, T. Holubar, P. Hundegger, W. Perthold, G. Hilscher y P. Rogl. "Superconductivity in Y-Ni-B base compounds". Physica C: Superconductivity 227, n.º 1-2 (junio de 1994): 85–94. http://dx.doi.org/10.1016/0921-4534(94)90360-3.

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41

Penkalla, H. J., J. Wosik y A. Czyrska-Filemonowicz. "Quantitative microstructural characterisation of Ni-base superalloys". Materials Chemistry and Physics 81, n.º 2-3 (agosto de 2003): 417–23. http://dx.doi.org/10.1016/s0254-0584(03)00037-3.

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42

Huis in't Veld, A. J. y J. Th M. De Hosson. "Crack initiation in a Ni-base superalloy". Scripta Metallurgica 21, n.º 11 (noviembre de 1987): 1481–86. http://dx.doi.org/10.1016/0036-9748(87)90287-0.

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43

Smith, A. B. y S. M. Ng. "Aluminide Diffusion Coatings on Ni-base Superalloys". Transactions of the IMF 74, n.º 2 (enero de 1996): 64–65. http://dx.doi.org/10.1080/00202967.1996.11871096.

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44

Dupin, N. y B. Sundman. "A thermodynamic database for Ni-base superalloys". Scandinavian Journal of Metallurgy 30, n.º 3 (junio de 2001): 184–92. http://dx.doi.org/10.1034/j.1600-0692.2001.300309.x.

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45

AGHAIE-KHAFRI, M. y M. NOORI. "Life prediction of a Ni-base superalloy". Bulletin of Materials Science 34, n.º 2 (abril de 2011): 305–9. http://dx.doi.org/10.1007/s12034-011-0074-8.

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46

Westbrooke, Eboni F., Luis E. Forero y Fereshteh Ebrahimi. "Slip analysis in a Ni-base superalloy". Acta Materialia 53, n.º 7 (abril de 2005): 2137–47. http://dx.doi.org/10.1016/j.actamat.2005.01.025.

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47

Mehner, A., T. Hoja, F. Hoffmann, H. W. Zoch, M. Kleingries, H. Ackermann, H. Köhne y K. Lucka. "Metal dusting of high temperature Cr-Ni steels and Ni-base alloys". HTM Journal of Heat Treatment and Materials 65, n.º 1 (febrero de 2010): 30–36. http://dx.doi.org/10.3139/105.110046.

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48

Huang, He Fei, De Hui Li y Long Yan. "Xenon Ion Irradiation Effects on a Ni-Base Ni-17Mo-7Cr Alloy". Advances in Science and Technology 94 (octubre de 2014): 69–74. http://dx.doi.org/10.4028/www.scientific.net/ast.94.69.

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Resumen

The irradiation effects of a new nickel-base alloy (Ni-17Mo-7Cr) has been investigated by using 1 MeV Xe20+ and 7 MeV Xe26+ ions irradiation with displacement damage range from 0.33 to 6.6 dpa. The transmission electron microscopy and nanoindentation were employed to study respectively the microstructural evolution of thin-foil specimens and nanoindentation hardness changes of bulk specimens. In case of 0.33 dpa, high number density of nano-scale black spots were observed in thin-foil specimens. High-resolution transmission electron microscopy images revealed that these black spots are some rounded solute clusters and dislocation loops. As far as the ion dose of 3.3 and 6.6 dpa, the black spots were replaced with linear-like defects which were proved to be some Ni, Mo and Cr-enrichment regions. In addition, nanoindentation results for bulk specimens showed an evident hardening phenomenon in irradiated Ni-17Mo-7Cr alloys, compared to the unirradiated specimen. The irradiation induced defects may be responsible for the hardening of Ni-17Mo-7Cr alloys.

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49

Assusa, Gonzalo. "Ni jóvenes, ni desempleados, ni peligrosos, ni novedosos. Una crítica sociológica del concepto de “jóvenes nini” en torno los casos de España, México y Argentina". Cuadernos de Relaciones Laborales 37, n.º 1 (10 de junio de 2019): 91–111. http://dx.doi.org/10.5209/crla.63821.

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La noción de nini clasifica los jóvenes que no trabajan ni estudian. El presente artículo pone en diálogo una serie de investigaciones sobre la temática y explora algunos puntos de continuidad entre sus análisis. El objetivo del texto es discutir con evidencia empírica los supuestos y asunciones no problematizadas de la categoría nini para reinsertar la problemática en la relación entre los jóvenes y la cristalización más amplia de procesos multidimensionales de producción y reproducción de las desigualdades. Con este objetivo el artículo analiza los principales debates acerca de las mediciones y las hipótesis interpretativas fundamentales en base a una serie de investigaciones antecedentes y pone en relación el análisis de los nini con la dinámica del mercado de trabajo en base a datos estadísticos de España, México y Argentina. El texto concluye identificando desafíos para las políticas de intervención sobre la problemática.

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50

Lipshutz, Bruce H., Tom Butler, Bryan A. Frieman, Vladimir Kogan, Ching-Tien Lee, Asher Lower, Danielle M. Nihan, Benjamin R. Taft y Anthony E. Tomaso. "New technologies in catalysis using base metals". Pure and Applied Chemistry 78, n.º 2 (1 de enero de 2006): 377–84. http://dx.doi.org/10.1351/pac200678020377.

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