Увійти

Готові списки джерел за темами / Nickel Vanadium / Статті в журналах

Статті в журналах з теми "Nickel Vanadium"

Щоб переглянути інші типи публікацій з цієї теми, перейдіть за посиланням: Nickel Vanadium.

Автор: Grafiati

Опубліковано: 14 березня 2023

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Ознайомтеся з топ-50 статей у журналах для дослідження на тему "Nickel Vanadium".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Переглядайте статті в журналах для різних дисциплін та оформлюйте правильно вашу бібліографію.

1

BAROUCHAS, Pantelis E., Anastasia AKOUMIANAKI-IOANNIDOU, Aglaia LIOPA-TSAKALIDI, and Nicholas K. MOUSTAKAS. "Effects of Vanadium and Nickel on Morphological Characteristics and on Vanadium and Nickel Uptake by Shoots of Mojito (Mentha × villosa) and Lavender (Lavandula anqustifolia)." Notulae Botanicae Horti Agrobotanici Cluj-Napoca 47, no. 2 (December 21, 2018): 487–92. http://dx.doi.org/10.15835/nbha47111413.

Повний текст джерела

Анотація:

Vanadium and Nickel may enter the human food chain through medicinal and culinary plants which in great doses are toxic to human, so it is important to determine their potential toxicity and health risk. Therefore, the objective of this work was to study the effects of Vanadium and Nickel on morphological characteristics and on Vanadium and Nickel uptake by shoots of mojito (Mentha × vilosa) and lavender (Lavandula anqustifolia). A completely randomized block design with five Vanadium treatments (0, 5, 10, 20, 40 mg V L-1) and five replications per treatment and another one with five Nickel treatments (0, 5, 10, 20 and 40 mg Ni L-1) and five replications per treatment for mojito and lavender were conducted in pots. No visible toxic or inhibitory symptoms were observed on the plants due to the increasing amounts of Vanadium or Nickel. Shoot dry matter and root dry matter of mojito and lavender decreased with increasing Vanadium rates. Vanadium uptake by shoots of mojito and lavender increased linearly with increasing Vanadium rates. Nickel uptake by shoots of lavender increased linearly with increasing rates of Nickel. Mojito is a Nickel accumulator.

Стилі APA, Harvard, Vancouver, ISO та ін.

2

Wang, Miao, Liulu Cai, Jiankang Wen, Wenjuan Li, Xinlong Yang, and Hongying Yang. "The Prospect of Recovering Vanadium, Nickel, and Molybdenum from Stone Coal by Using Combined Beneficiation and Metallurgy Technology Based on Mineralogy Features." Minerals 13, no. 1 (December 23, 2022): 21. http://dx.doi.org/10.3390/min13010021.

Повний текст джерела

Анотація:

Black shale ore contains rich strategic metal resources such as vanadium, nickel, and molybdenum, but due to its complex composition, it is currently only used in the vanadium extraction industry. Metals such as nickel and molybdenum have not been effectively recovered, resulting in environmental pollution and resource waste. Using mineralogical features and a combination of beneficiation and metallurgy-based tests, the present work carried out feasibility studies of the combined beneficiation and metallurgy processes. The mineralogical features of the stone coal sample were studied using chemical analysis, an automatic mineral analyzer (BPMA), etc., and we identified the main phase composition, embedded characteristics, and particle size distribution of the associated strategic metals, vanadium, nickel, and molybdenum. The results showed that the grade of V2O5 in the stone coal was 1.29%, which was mainly present in carbonaceous clay and mica minerals. The nickel grade was 0.53%, mainly in the form of nickel–magnesium spinel and a small amount of nickel-containing magnesite. The stone coal contained 0.11% molybdenum; the mineral particles were fine, mostly in the form of molybdenite, and some were associated with carbonaceous matter and carbonaceous clay minerals. Based on the mineralogical feature, we proposed using the scrubbing–desliming and flotation process to enrich vanadium, nickel, and molybdenum. Our preliminary experiments obtained two products: vanadium–molybdenum-rich sludge and nickel-containing tailings. The V2O5 and molybdenum grades in the sludge were 4.10% and 0.44%, respectively, and the recovery was 41.31% and 51.40%, respectively. The nickel grade in the tailings was 1.49%. These products were roasted and leached. The vanadium, nickel, and molybdenum in the stone coal were effectively recovered through the beneficiation–metallurgy combination process, and the comprehensive utilization rate of the stone coal was improved.

Стилі APA, Harvard, Vancouver, ISO та ін.

3

Pelleg, Joshua. "Nickel diffusion in vanadium." Philosophical Magazine A 54, no. 1 (July 1986): L21—L29. http://dx.doi.org/10.1080/01418618608242874.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

4

Sun, D. D., J. H. Tay, C. E. G. Qian, and D. Lai. "Stabilization of heavy metals on spent fluid catalytic cracking catalyst using marine clay." Water Science and Technology 44, no. 10 (November 1, 2001): 285–91. http://dx.doi.org/10.2166/wst.2001.0642.

Повний текст джерела

Анотація:

Spent fluid catalytic cracking catalyst is a hazardous solid waste generated by petroleum refineries containing vanadium and nickel. The marine clay was used as a matrix to stabilize vanadium and nickel and produce bricks which were then fired at various temperatures. TCLP leaching tests indicated that stabilizing brick had low metal leaching, with a maximum of 6.4 mg/l for vanadium and 19.8 μg/l for nickel. Compressive strength of stabilizing brick was found to range between 20 N/mm2 and 47 N/mm2. It is believed that stabilization and encapsulation mechanisms are responsible for the stabilization of vanadium and nickel. Encapsulation is a process whereby the marine clay matrix forms a physical barrier around the heavy metals which are thus prevented from leaching out into the environment. Incorporation involves the formation of bonds between the marine clay matrix and the heavy metals which thus become incorporated in the clay microstructure.

Стилі APA, Harvard, Vancouver, ISO та ін.

5

Dye, Janice A., Kenneth B. Adler, Judy H. Richards, and Kevin L. Dreher. "Role of soluble metals in oil fly ash-induced airway epithelial injury and cytokine gene expression." American Journal of Physiology-Lung Cellular and Molecular Physiology 277, no. 3 (September 1, 1999): L498—L510. http://dx.doi.org/10.1152/ajplung.1999.277.3.l498.

Повний текст джерела

Анотація:

Particulate matter (PM) metal content and bioavailability have been hypothesized to play a role in the health effects epidemiologically associated with PM exposure, in particular that associated with emission source PM. Using rat tracheal epithelial cells in primary culture, the present study compared and contrasted the acute airway epithelial effects of an emission source particle, residual oil fly ash (ROFA), with that of its principal constitutive transition metals, namely iron, nickel, and vanadium. Over a 24-h period, exposure to ROFA, vanadium, or nickel plus vanadium, but not to iron or nickel, resulted in increased epithelial permeability, decreased cellular glutathione, cell detachment, and lytic cell injury. Treatment of vanadium-exposed cells with buthionine sulfoximine further increased cytotoxicity. Conversely, treatment with the radical scavenger dimethylthiourea inhibited the effects in a dose-dependent manner. RT-PCR analysis of RNA isolated from ROFA-exposed rat tracheal epithelial cells demonstrated significant macrophage inflammatory protein-2 and interleukin-6 gene expression as early as 6 h after exposure, whereas gene expression of inducible nitric oxide synthase was maximally increased 24 h postexposure. Again, vanadium (not nickel) appeared to be mediating the effects of ROFA on gene expression. Treatment with dimethylthiourea inhibited both ROFA- and vanadium-induced gene expression in a dose-dependent manner. Corresponding effects were observed in interleukin-6 and macrophage inflammatory protein-2 synthesis. In summary, generation of an oxidative stress was critical to induction of the ROFA- or vanadium-induced effects on airway epithelial gene expression, cytokine production, and cytotoxicity.

Стилі APA, Harvard, Vancouver, ISO та ін.

6

Porcayo-Calderon, J., J. J. Ramos-Hernandez, Jan Mayén, E. Porcayo-Palafox, G. K. Pedraza-Basulto, J. G. Gonzalez-Rodriguez, and L. Martinez-Gomez. "High Temperature Corrosion of Nickel in NaVO3-V2O5Melts." Advances in Materials Science and Engineering 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/8929873.

Повний текст джерела

Анотація:

Many alloys used at high temperature in industrial processes are Ni-based and many others contain it in appreciable quantities, so it is of interest to evaluate the performance of pure nickel in order to determine the behavior of its alloys once the elements responsible for their protection have been depleted due to accelerated corrosion processes in the presence of vanadium-rich molten salts. Due to this, this work presents the study of Ni behavior in NaVO3-V2O5mixtures at different temperatures. The behavior of pure nickel was determined by both electrochemical and mass loss measurements. The results show that the aggressiveness of the vanadium salts is increased by increasing both the V2O5content and temperature. V2O5addition considerably increases the current densities of the anodic and cathodic reactions. The corrosion process of Ni is modified due to the presence of its corrosion products, and its presence increases the activation energy by at least one order of magnitude. Although nickel shows a high reactivity in vanadium-rich salts, its reaction products are highly stable and protect it from the corrosive medium because the corrosion reactions trap the vanadium and block the migration of nickel ions.

Стилі APA, Harvard, Vancouver, ISO та ін.

7

Zhang, Dong, and Mats Johnsson. "Nickel vanadium tellurium oxide, NiV2Te2O10." Acta Crystallographica Section C Crystal Structure Communications 65, no. 4 (March 7, 2009): i9—i10. http://dx.doi.org/10.1107/s0108270109006817.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

8

Levina, A. V., M. I. Fedorova, Yu A. Zakhodyaeva, and A. A. Voshkin. "ON INTERFACIAL DISTRIBUTION OF NICKEL (II) AND VANADIUM (IV) IONS IN SYSTEM BASED ON PEG-1500." Chemical Engineering 23, no. 2 (2022): 73–79. http://dx.doi.org/10.31044/1684-5811-2022-23-2-73-79.

Повний текст джерела

Анотація:

The interfacial distribution of nickel (II) and vanadium (IV) ions in an extraction system based on polyethylene glycolPEG-1500 and sodium nitrate has been studied. Based on obtained experimental data, a functional diagram for the isolation of ions of nickel (II) and vanadium (IV) from a model solution formed after demetallization of crude oil was developed.

Стилі APA, Harvard, Vancouver, ISO та ін.

9

Rocca, E., P. Steinmetz, and M. Moliere. "Revisiting the Inhibition of Vanadium-Induced Hot Corrosion in Gas Turbines." Journal of Engineering for Gas Turbines and Power 125, no. 3 (July 1, 2003): 664–69. http://dx.doi.org/10.1115/1.1456095.

Повний текст джерела

Анотація:

Since the 1970s, nothing substantially new has been published in the gas turbine community about the hot corrosion by vanadium and its inhibition, after the “inhibition orthodoxy” based on the formation of magnesium vanadate, was established. However, the experience acquired since the late 1980s with heavy-duty gas turbines burning ash-forming fuels in southern China, shows that the combustion of very contaminated fuels does not entail corrosion nor abundant ash-deposit on gas turbines buckets. Analyses of deposits collected from gas turbines fired with these crude oils showed that the ash-deposit contains a large amount of nickel. These new facts led to revisit the role played by nickel and envisage its possible inhibiting action against the vanadium-induced hot corrosion. A thorough review of the literature on the vanadium-induced corrosion have been carried out, and the study of the nickel effects with respect to magnesium effects on the ash deposit have been performed. Results show that nickel presents an interesting way to substitute magnesium for the inhibition of vanadium-induced hot corrosion. The advantages of nickel with respect to magnesium are to be efficient at alow Ni/V ratio, to produce less abundant, less adherent ash and to act, to some extent, as a self-cleaning agent for the blades of the turbine.

Стилі APA, Harvard, Vancouver, ISO та ін.

10

Sun, D., X. Z. Li, M. Brungs, and D. Trimm. "Encapsulation of heavy metals on spent fluid catalytic cracking catalyst." Water Science and Technology 38, no. 4-5 (August 1, 1998): 211–17. http://dx.doi.org/10.2166/wst.1998.0625.

Повний текст джерела

Анотація:

Vanadium and nickel were found as major contaminants on spent FCC catalyst at levels of 3518 ppm and 3225 ppm, respectively. XPS results indicated that vanadium and nickel were in oxide form on spent FCC catalysts. Leaching tests (TCLP) showed that vanadium from spent FCC catalysts poses an environmental problem if disposed by landfill. It was found that encapsulation treatment with up to 60 wt % spent FCC catalyst in Portland cement, is an effective means of stabilization. The strength of standard specimens containing catalyst was much lower than that of standard specimens made with same weight percentage of sand.

Стилі APA, Harvard, Vancouver, ISO та ін.

11

Timoshchik, O. A., E. A. Shchelokova, A. G. Kasikov, and M. V. Bryukhanova. "Sorption of vanadium (V) and nickel (II) on amorphous silic." Transaction Kola Science Centre 12, no. 2-2021 (December 13, 2021): 253–60. http://dx.doi.org/10.37614/2307-5252.2021.2.5.051.

Повний текст джерела

Анотація:

The sorption of vanadium (V) and nickel (II) from aqueous solutions on amorphous silica obtained from metallurgical slags of the Kola MMC is considered, and the optimal conditions for the metal sorption process are determined. It is established that the maximum sorption of metals is achieved at pH 2.0–4.0, at a temperature of 40 °C and a process time of 60 minutes for nickel and 90 minutes for vanadium.

Стилі APA, Harvard, Vancouver, ISO та ін.

12

Krasovskyy, V. P., and N. A. Krasovskaya. "Study of the impregnation kinetics of basalt, carbon, oxide fibers with aluminum melts and its alloys." Uspihi materialoznavstva 2021, no. 2 (June 1, 2021): 114–25. http://dx.doi.org/10.15407/materials2021.02.114.

Повний текст джерела

Анотація:

Wetting studies were performed by the sessile drop method using the capillary purification method of melt during the experiment in a vacuum of 2·10-3 Pa in the temperature range of 600–700 oC. The use of a dropper allows separate heating of the melt and the substrate, capillary and thermo vacuum cleaning of the melt, as well as thermo vacuum cleaning of the coatings surface. This is a model scheme of the impregnation process of non-metallic frames with matrix melts in the manufacture of composite materials by spontaneous free impregnation. Vanadium, copper and nickel metals were chosen for the coatings, which were sprayed on the materials by electron beam evaporation of metals in vacuum, and titanium, nickel powders for the coatings were used. The nature of the wetting angle dependence on the film thickness is a linear decrease in the angle with increasing film thickness. Studies have shown the possibility of using double films vanadium–copper, vanadium–nickel for the manufacture of composite materials from basalt fibers. The process of impregnation of basalt, carbon and oxide fibers with aluminum melts and its alloy with silicon in the temperature range 650–700 oC has been studied. The metal titanium, nickel powder coatings and films vanadium–copper, vanadium–nickel for the method of spontaneous free impregnation were used. Speciments of the composite material were obtained and the limit of destruction of these samples was determined. The bend strength of composites (basalt fiber 200 μm) is 270 MPa. Keywords: spontaneous free impregnation, composites, aluminium melts, basalt, carbon, oxide fibers, wetting, metal coatings and coverings.

Стилі APA, Harvard, Vancouver, ISO та ін.

13

Beolchini, F., V. Fonti, Francesco Ferella, Marcello Centofanti, and Francesco Vegliò. "Bioleaching of Nickel, Vanadium and Molybdenum from Spent Refinery Catalysts." Advanced Materials Research 71-73 (May 2009): 657–60. http://dx.doi.org/10.4028/www.scientific.net/amr.71-73.657.

Повний текст джерела

Анотація:

Spent catalysts represent a large amount of refinery solid waste. In particular, hydro-processing catalysts contain base valuable metals, such as nickel, vanadium and molybdenum and, for their toxic component, these wastes have been classified as hazardous by the Environmental Protection Agency in the USA. The development of an innovative eco-sustainable process for the valorisation of such wastes would undoubtedly give significant advantages also taking into account primary resources preservation. This paper deals with bioleaching of metals from hazardous spent hydro-processing catalyst by means of iron/sulphur oxidizing bacteria. The exhaust catalyst was rich in nickel (45 mg/g), vanadium (44 mg/g) and molybdenum (94 mg/g). Before bioleaching, the solid was washed by means of a mixture of Tween 80 and ethyl alcohol, for hydrocarbon removal. The effects of elemental sulphur, ferrous iron and actions contrasting a possible metal toxicity (either the presence of powdered activated charcoal or the simulation of a cross current process by means of filtration stages in series) was investigated. Ferrous iron resulted to be essential for metal extraction and for bacteria adaptation. Nickel and vanadium were successfully bioleached in the presence of iron, reaching extraction yields of 83% and 90%, respectively; on the other hand extractions around 50% for nickel and vanadium were observed both in biological systems in the absence of iron and in the chemical controls with iron. As concerns molybdenum, the highest extraction yields experimentally observed was about 50%, after 26 days bioleaching in the presence of iron, while a maximum extraction of 25 % was observed in the other treatments. In conclusion, a bio-oxidative attack with iron could successfully extract nickel, vanadium and partially molybdenum. Further actions aimed at contrasting a possible metal toxicity resulted not to be effective.

Стилі APA, Harvard, Vancouver, ISO та ін.

14

Basaleh, A. S. "Vanadium-Decorated Nickel Oxide Nanosheets for Photocatalytic Removal of Malachite Green Dye Using Visible Light." Nanoscience and Nanotechnology Letters 11, no. 10 (October 1, 2019): 1410–16. http://dx.doi.org/10.1166/nnl.2019.3020.

Повний текст джерела

Анотація:

Nickel oxide (NiO) nanosheets were prepared using a hydrothermal method, and vanadiumdecorated nickel oxide nanosheets were prepared using a photoassisted deposition method. The NiO and vanadium-decorated nickel oxide (V @ NiO) photocatalysts were investigated by several techniques, including BET, XPS, PL, UV-Vis, XRD, and TEM. The results demonstrated that the NiO bandgap energy can be adjusted by adjusting the weight percent of decorated vanadium. Malachite green dye degradation under visible light conditions was chosen to measure the photocatalytic performance of the NiO and V @ NiO samples. Additionally, parameters that affect photocatalytic performance, such as the concentration of malachite green dye, dose of the photocatalyst and vanadium weight percent, were studied in detail. The outcomes reveal that V @ NiO samples have photocatalytic activity higher than that of NiO samples due to their ability to hinder the electron–hole recombination rate and decrease the band gap energy.

Стилі APA, Harvard, Vancouver, ISO та ін.

15

J. Shadhan, Zainab, and Mohammed N. Abbas. "REMOVAL OF HEAVY METALS FROM REFINERIES WASTEWATER." Journal of Engineering and Sustainable Development 25, Special (September 20, 2021): 3–97. http://dx.doi.org/10.31272/jeasd.conf.2.3.9.

Повний текст джерела

Анотація:

In this study, the adsorption method was investigated for removing vanadium (V+5), nickel (Ni+2) and cadmium (Cd+2) ions from aqueous solutions contaminated with these metals, which simulate the polluting metals of the liquid wastewater of oil refineries in three Iraqi refineries, namely the Kirkuk refinery - Kirkuk governorate in northern Iraq, and the Doura refinery - Baghdad in central Iraq and Al-Shuaiba refinery in Basra Governorate, southern Iraq. Three types of pre-prepared common adsorbents were used, which are activated carbon, alumina, and white eggshells in a batch mode unit. The results obtained from the study showed that 5 was the best acidic function (pH) for removing vanadium and cadmium by using all adsorbent materials, while the acidic function with a value of 6 was the optimum in the case of nickel. Likewise, the equilibrium concentration with the activated carbon only reached 150 ppm for vanadium and cadmium and 100 ppm for elemental nickel. The nickel equilibrium concentration reached 90 and 75 ppm using alumina and white eggshells respectively. The equilibrium concentrations of vanadium were 100 for the rest of the substances. The results obtained also showed that increasing the agitation speed leads to enhancing the removal efficiency within less than 400 rpm and with a best contact time was 150 minute under ambient temperature and with an amount of adsorbent ranged between 0.3 - 0.7 g of different adsorbent.

Стилі APA, Harvard, Vancouver, ISO та ін.

16

Lewis, Chad A., Meitian Wang, and Arthur Mar. "Vanadium nickel antimonide, VNi0.26(2)Sb." Acta Crystallographica Section E Structure Reports Online 58, no. 5 (April 30, 2002): i39—i40. http://dx.doi.org/10.1107/s1600536802007547.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

17

Raghavan, V. "Al-Ni-V (Aluminum-Nickel-Vanadium)." Journal of Phase Equilibria & Diffusion 26, no. 3 (June 1, 2005): 273–75. http://dx.doi.org/10.1361/15477030523661.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

18

Betancourt, P., A. Rives, C. E. Scott, and R. Hubaut. "Hydrotreating on mixed vanadium–nickel sulphides." Catalysis Today 57, no. 3-4 (April 2000): 201–7. http://dx.doi.org/10.1016/s0920-5861(99)00327-2.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

19

Tatterson, David F., and Rodney L. Mieville. "Nickel/vanadium interactions on cracking catalyst." Industrial & Engineering Chemistry Research 27, no. 9 (September 1988): 1595–99. http://dx.doi.org/10.1021/ie00081a007.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

20

Raghavan, V. "Al-Ni-V (Aluminum-Nickel-Vanadium)." Journal of Phase Equilibria and Diffusion 26, no. 3 (August 2005): 273–75. http://dx.doi.org/10.1007/s11669-005-0117-1.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

21

Raghavan, V. "Fe-Ni-V (Iron-Nickel-Vanadium)." Journal of Phase Equilibria 15, no. 6 (December 1994): 630. http://dx.doi.org/10.1007/bf02647633.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

22

Yang, Shien-Jen, Yu-Wen Chen, and Chiuping Li. "Vanadium-nickel interaction in REY zeolite." Applied Catalysis A: General 117, no. 2 (September 1994): 109–23. http://dx.doi.org/10.1016/0926-860x(94)85092-5.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

23

Canevari, Gerard P., and Robert J. Fiocco. "CRUDE OIL VANADIUM AND NICKEL CONTENT CAN PREDICT EMULSIFICATION TENDENCY." International Oil Spill Conference Proceedings 1997, no. 1 (April 1, 1997): 309–14. http://dx.doi.org/10.7901/2169-3358-1997-1-309.

Повний текст джерела

Анотація:

ABSTRACT Most crude oils in contact with water form water-in-oil emulsions. The stability of these emulsions will vary. When spilled crude oil emulsifies, it becomes viscous and expands in volume, becoming more difficult to recover, chemically disperse, or ignite. The ability to better predict the emulsion-forming behavior of a specific crude oil would greatly aid oil spill response decisions. The problem is complex because of the various stabilizing mechanisms. This study identified surface active agents, that is, porphyrins, as key compounds that contribute to the emulsification of crude oil, particularly fresh crude oil. This research not only identified these metal-porphyrin agents but also determined the mechanism for their emulsion stabilization. These porphyrin complexes are known to be associated with the metals vanadium and nickel. Because the vanadium and nickel levels of a specific crude oil are available from its published assay, they can be used to predict the emulsification of oil early in the spill. The study has also established that a concentration level of over 15 ppm of vanadium and nickel is required to form a stable emulsion for fresh crude oil. It should be stressed that the vanadium-nickel index applies to fresh crude oil. A second emulsification mechanism was also observed during this research that was related to the weathering of the crude oil. Extensive data to support this mechanism are presented and may provide a valuable tool for oil spill response.

Стилі APA, Harvard, Vancouver, ISO та ін.

24

Hernández, Alicia, Rafael P. Mellado, and José L. Martínez. "Metal Accumulation and Vanadium-Induced Multidrug Resistance by Environmental Isolates of Escherichia hermannii andEnterobacter cloacae." Applied and Environmental Microbiology 64, no. 11 (November 1, 1998): 4317–20. http://dx.doi.org/10.1128/aem.64.11.4317-4320.1998.

Повний текст джерела

Анотація:

ABSTRACT Contaminated soils from an oil refinery were screened for the presence of microorganisms capable of accumulating either nickel, vanadium, or both metals. Three strains of bacteria that belonged to the family Enterobacteriaceae were selected. Two of them were Escherichia hermannii strains, and outer membrane profile (OMP) analysis showed that they were similar to a strain of clinical origin; the other one was an Enterobacter cloacaestrain that differed from clinical isolates. The selected bacteria accumulated both nickel and vanadium. Growth in the presence of vanadium induced multidrug resistance phenotypes in E. hermannii and E. cloacae. Incubation with this metal changed the OMP profile of E. hermannii but did not produce variations in the expression of the major OMPs of E. cloacae.

Стилі APA, Harvard, Vancouver, ISO та ін.

25

Mohammed, Saeed, Mimonitu Opuwari, Salam Titinchi, and Lilburne Cyster. "Metal–Metal Correlation of Biodegraded Crude Oil and Associated Economic Crops from the Eastern Dahomey Basin, Nigeria." Minerals 12, no. 8 (July 28, 2022): 960. http://dx.doi.org/10.3390/min12080960.

Повний текст джерела

Анотація:

The presence of heavy metals in plants from oil sand deposits may reflect mineralization resulting from petroleum biodegradation. Petroleum composition and heavy metal analyses were performed using thermal desorption gas chromatography and atomic absorption spectrophotometry on oil sand and plant root samples from the same localities in the Dahomey Basin. The results from the oil sand showed mainly heavy-end hydrocarbon components, humps of unresolved complex mixtures (UCM), absences of C6-C12 hydrocarbon chains, pristane, and phytane, indicating severe biodegradation. In addition, they showed varying concentrations of vanadium (2.699–7.708 ppm), nickel (4.005–11.716 ppm), chromium (1.686–5.733 ppm), cobalt (0.953–3.223 ppm), lead (0.649–0.978 ppm), and cadmium (0.188–0.461 ppm). Furthermore, these heavy metals were present in Citrus, Theobroma Cacao, Elaeis guineensis, and Cola. The chromium, nickel, vanadium, lead, cobalt, and cadmium concentrations in the Citrus were 7.475, 4.981, 0.551, 0.001, 0.806, and 0.177 ppm, respectively. For the Theobroma Cacao, the concentrations of chromium, nickel, vanadium, lead, cobalt, and cadmium were 7.095, 16.697, 2.151, 0.023, 3.942, and 0.254 ppm. Elaeis guineensis also showed the presence of chromium (32.685 ppm), nickel (32.423 ppm), vanadium (11.983 ppm), lead (0.190 ppm), cobalt (4.425 ppm), and cadmium (0.262 ppm). The amounts of chromium, nickel, vanadium, lead, cobalt, and cadmium in the Cola were 9.687, 9.157, 0.779, 0.037, 0.695, and 0.023 ppm. The World Health Organization’s (WHO) safe and permissible limits for Cd (0.003 ppm), Cr (0.1 ppm), Ni (0.05 ppm), and Pb (0.1 ppm) in agricultural soils were all exceeded in the oil sand. The presence of these metals in the oil sands and their uptake by the plants could potentially be toxic, resulting in high mortality. The metal–metal correlation of the plant’s rootsto the oil sand indicates the nonanthropogenic origin of the heavy metals, which leads to the conclusion that their source is related to the hydrocarbon accumulation in the Afowo sand.

Стилі APA, Harvard, Vancouver, ISO та ін.

26

Nagata, Hiroshi. "Nickel/Vanadium and Nickel/Titanium Multilayers for X-Ray Optics." Japanese Journal of Applied Physics 29, Part 1, No. 6 (June 20, 1990): 1215–19. http://dx.doi.org/10.1143/jjap.29.1215.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

27

Yan, Caihong, Enshan Han, Yanzhen He, and Shun Lu. "Vanadium Doped Nickel Sulfide@ Nickel Foam Electrode for Hybrid Supercapacitors." ECS Meeting Abstracts MA2022-02, no. 7 (October 9, 2022): 2570. http://dx.doi.org/10.1149/ma2022-0272570mtgabs.

Повний текст джерела

Анотація:

Abstract With the depletion of energy sources, people are gradually deepening the development of new energy sources. However, energy storage devices are limiting the pace of the development of new energy sources.[1] Considering the potential of supercapacitors as a supplement or alternative to rechargeable batteries for fast energy harvesting and high power transfer has become a research focus recently. Hybrid supercapacitors (HSCs) can bridge the gap between supercapacitors and batteries. It is well known that the main components of HSC devices are anode and cathode. The anode mainly provides high electrochemical performance, while the cathode can supply a wide potential window and good stability.[2] The energy density calculation equation (E = 0.5 CV2 ) is known and deduced that can control the energy density of HSC by the operating voltage window (V) and specific capacitance (C). Obviously, constructing anode materials with high capacitance is one of the effective ways to achieve the high energy density of HSC. In addition, previous experimental results show that reasonable ion doping is beneficial to change the electronic structure of electrode materials and improving the energy storage performance of electrode materials.[3-5] One of the elements with more than one oxidation state can form two (or more) ions of different valence states under the action of a reducing agent, which will be called mixed-valence ions. Boosting the specific capacitance of the electrode, ions with mixed-valence states have higher charge storage capacity and more abundant redox reactions than most other transition metal ions. In this regard, vanadium has various stable oxidation states (+ 2, + 3, + 4, and + 5). In particular, its high oxidation states (+ 4 and + 5) can store charge in the positive potential range, thus providing a favorable pseudo-capacitance. Here, we chose Ni3S2 with high theoretical capacitance and prepared vanadium-doped nickel sulfide (V-Ni3S2, denoted as VNS) anode electrodes using vanadium ions as dopant ions (Figure 1). Using nickel foam as the nickel source, prepared the VNS electrode by a one-step hydrothermal method. Since the electrode is grown in situ on the surface of nickel foam, the electrode material can be employed as an electrode sheet directly after preparation without further fabrication. Figure 1. Schematic diagram of synthesis process of VNS electrode, and Electrochemical storage performance: (a) CV curves of the VNS and NS electrodes at 2 mV s-1 scan rate, (b) GCD curves of the VNS and NS electrodes at 1 A g-1, (c) GCD curves of VNS with different V doping amounts at 1 A g-1, (d) The Ragone plots, (e) Self-discharge of NS//AC device and VNS//AC device for five hours, and (f) Cycle performance of the VNS//AC hybrid supercapacitor with a voltage of 1.6 V at a current density of 2 A g-1. [6] The most direct effect of avoiding the use of binder and thus increasing the conductivity is that the specific capacitance of the prepared VNS electrodes is further enhanced (2072 F g− 1 at 1 A g− 1). In addition, the structure of the surface of the prepared VNS electrode material is nanoflower morphology. Integrating two-dimensional nanosheets into three-dimensional nanoflower morphologies increases the number of active sites while improving the structural stability (capacitance retention of 86.4% after 10,000 cycles, Figure 1a-f). Finally, using the VNS and activated carbon electrodes as anode and cathode to assemble the VNS//AC hybrid supercapacitors delivers an excellent energy density of 81.33 Wh kg− 1 at a power density of 160 W kg− 1. This simple preparation method and significantly enhanced performance of the electrode materials have far-reaching potential for application in HSC devices. References [1] C. Li et al. MOF-derived NiZnCo-P nano-array for asymmetric supercapacitor, Chem. Eng. J. 446 (2022) 137108. [2] K. Tao et al. Epitaxial grown self-supporting NiSe/Ni3S2/Ni12P5 vertical nanofiber arrays on Ni foam for high performance supercapacitor: Matched exposed facets and re-distribution of electron density, Nano Energy, 55 (2019) 65-81. [3] G. Li et al. One-pot synthesis of Cu-doped Ni3S2 nano-sheet/rod nanoarray for high performance supercapacitors, Chem. Eng. J. 388 (2020) 124319. [4] Y. Ruan et al. Al-doped β-NiS Mesoporous Nanoflowers for Hybrid-type Electrodes toward Enhanced Electrochemical Performance, Electrochim. Acta, 236 (2017) 307-318. [5] Y. Cheng et al. A novel electrode for supercapacitors: Spicules-like Ni3S2 shell grown on molybdenum nanoparticles doped nickel foam, Appl. Surf. Sci. 467-468 (2019) 1113-1121. [6] C. Yan et al. Hydrothermal synthesis of vanadium doped nickel sulfide nanoflower for high-performance supercapacitor, J. Alloy. Compd. (2022) 167189. Figure 1

Стилі APA, Harvard, Vancouver, ISO та ін.

28

Mahmood, Luma Hussein. "Activated Bentonite for Removal Nickle and Vanadium from Petroleum Distillates." Journal of Engineering 25, no. 3 (February 28, 2019): 11–22. http://dx.doi.org/10.31026/j.eng.2019.03.02.

Повний текст джерела

Анотація:

The present work is to investigate the feasibility of removal vanadium (V) and nickel (Ni) from Iraqi heavy gas oil using activated bentonite. Different operating parameters such as the degree of bentonite activation, activated bentonite loading, and operating time was investigated on the effect of heavy metal removal efficiency. Experimental results of adsorption test show that Langmuir isotherm predicts well the experimental data and the maximum bentonite uptake of vanadium was 30 mg/g. The bentonite activated with 50 wt% H2SO4 shows a (75%) removal for both Ni and V. Results indicated that within approximately 5 hrs, the vanadium removal efficiencies were 33, 45, and 60% at vanadium loadings of 10, 30, and 40 ppm respectively. Further processing of heavy gas oil with 10 ppm vanadium shows a continuous slight increase in metal removal with operating time. At 10, 20, 40, and 50 hrs the removal efficiency was 68, 75, 78 and 78% respectively. Results indicated that an equilibrium concentration of the 10 ppm of vanadium was attained after 30 hrs while for Nickel at a loading of 4 and 7 ppm the equilibrium achieved after 40 hrs. Results depicted that activated bentonite has higher selectivity towards Vanadium. Results depict that activated bentonite (ACB) has a remarkable capacity for removal of (V) and (Ni) from heavy gas oil.

Стилі APA, Harvard, Vancouver, ISO та ін.

29

Ibraheem, Muzher M., Abdulhalim A. Mohammad, and Ayser T. Jarallah. "Kinetics of Sulfur, Vanadium and Nickel Removal from Basra Crude Oil Hydro Treating." Tikrit Journal of Engineering Sciences 17, no. 3 (September 30, 2010): 1–14. http://dx.doi.org/10.25130/tjes.17.3.08.

Повний текст джерела

Анотація:

Basra crude oil was hydro treated in trickle–bed reactor using cobalt – molybdenum alumina as a Catalyst. The reaction range temperatures was598 – 648 k, while LHSV was 0.7 – 2 hr-1. The pressure and H2/Oil for all experiments keep constant at 3Mpa and 300 L/L respectively. Desulphurization and demutualization kinetics were studied and found that the kinetics of sculpture removal is of first – order, and the kinetic of vanadium and nickel removal is of second – order. Activation energy were calculated and their value are 24.03, 745.86, 63.90 KJ / mole, respectively for sculpture, vanadium, and nickel.

Стилі APA, Harvard, Vancouver, ISO та ін.

30

Leiviskä, T., A. Keränen, N. Vainionpää, J. Al Amir, O. Hormi, and J. Tanskanen. "Vanadium(V) removal from aqueous solution and real wastewater using quaternized pine sawdust." Water Science and Technology 72, no. 3 (May 14, 2015): 437–42. http://dx.doi.org/10.2166/wst.2015.227.

Повний текст джерела

Анотація:

Cross-linked and quaternized pine sawdust was tested for vanadium removal from a synthetic aqueous solution as well as from real industrial wastewater which had a considerable amount of vanadium and other ions such as sulphate, ammonium and nickel. The maximum vanadium sorption capacity of the modified pine sawdust was found to be 130 mg/g in synthetic solution and 103 mg/g in real wastewater. Modified pine sawdust worked well over a wide range of pH. Column studies with real wastewater proved that vanadium was efficiently desorbed from the material with 2 M NaOH and that the material could be reused.

Стилі APA, Harvard, Vancouver, ISO та ін.

31

Li, Ning, Zhong Zhang, Yiwei Liu, Ying Lu, Danfeng He, Li Xu, Xiahua Zhong, and Shuxia Liu. "Magnetic and luminescence properties of an inorganic 3D nickel–vanadium bimetallic framework." New Journal of Chemistry 41, no. 3 (2017): 1245–49. http://dx.doi.org/10.1039/c6nj03413f.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

32

Boruah, Buddha Deka, and Abha Misra. "A flexible ternary oxide based solid-state supercapacitor with excellent rate capability." Journal of Materials Chemistry A 4, no. 44 (2016): 17552–59. http://dx.doi.org/10.1039/c6ta07829j.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

33

Nishimura, Chikashi, Masao Komaki, and Muneyuki Amano. "Hydrogen Permeation Characteristics of Vanadium-Nickel Alloys." Materials Transactions, JIM 32, no. 5 (1991): 501–7. http://dx.doi.org/10.2320/matertrans1989.32.501.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

34

Karaselçuk, Ravza, A. İnci İşli, A. Erhan Aksoylu, and Z. İlsen Önsan. "CO hydrogenation over bimetallic nickel–vanadium catalysts." Applied Catalysis A: General 192, no. 2 (February 2000): 263–71. http://dx.doi.org/10.1016/s0926-860x(99)00409-3.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

35

Zhong, Xiongwei, Linfei Zhang, Jun Tang, Jianwei Chai, Jincheng Xu, Lujie Cao, Mingyang Yang, et al. "Efficient coupling of a hierarchical V2O5@Ni3S2hybrid nanoarray for pseudocapacitors and hydrogen production." Journal of Materials Chemistry A 5, no. 34 (2017): 17954–62. http://dx.doi.org/10.1039/c7ta04755j.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

36

Ahmed Jassim Muklive. "Rwcovry of Nickel from Burned Fuel Waste in seawage station." journal of the college of basic education 17, no. 72 (June 17, 2019): 1–6. http://dx.doi.org/10.35950/cbej.v17i72.4491.

Повний текст джерела

Анотація:

Best chemical conditions for the recovery of nickel as sulphate or oxide from burned fuel waste in seawage stations had been considered. The effects of different factors like acid concentration, acid volume, time of reaction, and pH on the recovery of nickel from the waste have been studied. It was found that the percentage of nickel in the waste (3 - 6) % and becomes (8 - 15) % ater the recovery of vanadium. The performance of nickel recovery is 90% and the purity around 98%.

Стилі APA, Harvard, Vancouver, ISO та ін.

37

Gileva, Olga V., T. S. Ulanova, G. A. Viekhman, A. V. Nedoshitova, and E. V. Stenno. "Methodical assurance of the assessment of toxic and essential elements in human biological matrices." Hygiene and sanitation 95, no. 1 (October 28, 2019): 116–21. http://dx.doi.org/10.18821/00169900-2016-95-1-116-121.

Повний текст джерела

Анотація:

There is considered the complex of methodical modalities for the determination of elements (vanadium, chromium, manganese, nickel, copper, zinc, selenium, strontium, thallium, lead, cadmium, arsenic) in the biological matrices of population for the practical use in the framework of socio-hygienic monitoring and biomonitoring in areas with the high anthropogenic load. Guidelines developed on the basis of mass spectrometry with inductively coupled plasma (ICP-MS) confirmed as Methodological Instructions on Control (In Russian:MUK 4.1.3230-14) allowed to implement a hygienic estimation of the pollution of biological matrices of the adult population residing in the territory exposed to the impact of emission from ferrovanadium enterprises (city of Chusovoy, the Perm region). According to results of the study in the monitoring group in the blood there was established a significant excess of the content vanadium, manganese, nickel, strontium, cadmium and reduced selenium content, in urine - an excess of vanadium and chromium, relatively to the control group.

Стилі APA, Harvard, Vancouver, ISO та ін.

38

Volkov, Anton, Ulyana Kologrieva, and Pavel Stulov. "Study of Forms of Compounds of Vanadium and Other Elements in Samples of Pyrometallurgical Enrichment of Ash from Burning Oil Combustion at Thermal Power Plants." Materials 15, no. 23 (December 2, 2022): 8596. http://dx.doi.org/10.3390/ma15238596.

Повний текст джерела

Анотація:

The results of the processing of ash from the combustion of fuel oil after roasting with the addition of Na2CO3 followed by aluminothermic melting are presented. As a result, metallic nickel and vanadium slag were obtained. Studies of slag, metal, and deposits on the electrode were carried out. The resulting metal contains about 90 wt% Ni. The main phases of scurf on the electrode are a solid solution based on periclase (Mg1–x–y–zNixFeyVzO), sodium-magnesium vanadate (NaMg4(VO4)3), and substituted forsterite (Mg2–x–yFexNiySiO4). The processing of ash made it possible to significantly increase the concentration of vanadium and convert it into more soluble compounds. Vanadium amount increased from 16.2 in ash to 41.4–48.1 V2O5 wt% in slag. The solubility of vanadium was studied during aqueous leaching and in solutions of H2SO4 and Na2CO3. The highest solubility of vanadium was seen in H2SO4 solutions. The degree of extraction of vanadium into the solution during sulfuric acid leaching of ash was 18.9%. In slag, this figure increased to 72.3–96.2%. In the ash sample, vanadium was found in the form of V5+, V4+ compounds, vanadium oxides VO2 (V4+), V2O5 (V5+), and V6O13, and nickel orthovanadate Ni3(VO4)2 (V5+) was found in it. In the slag sample, vanadium was in the form of compounds V5+, V4+, V3+, and V(0÷3)+; V5+ was presented in the form of compounds vanadate NaMg4(VO4)3, NaVO3, and CaxMgyNaz(VO4)6; V3+ was present in spinel (FeV2O4) and substituted karelianite (V2–x–y–zFexAlyCrzO3). In the obtained slag samples, soluble forms of vanadium are due to the presence of sodium metavanadate (NaVO3), a phase with the structure of granate CaxMgyNaz(VO4)6 and (possibly) substituted karelianite (V2–x–y–zFexAlyCrzO3). In addition, spinel phases of the MgAl2O4 type beta-alumina (NaAl11O17), nepheline (Na4–xKxAl4Si4O16), and lepidocrocite (FeOOH) were found in the slag samples.

Стилі APA, Harvard, Vancouver, ISO та ін.

39

Apata, O. A., T. N. Muobeleni, A. A. Fabuyide, E. N. Ogunmuyiwa, G. O. Rading, P. K. Jain, M. J. Witcomb, and L. A. Cornish. "Development of VC-Ni Eutectic Alloys for Wear Resistance." Advanced Materials Research 1019 (October 2014): 347–54. http://dx.doi.org/10.4028/www.scientific.net/amr.1019.347.

Повний текст джерела

Анотація:

Vanadium carbide is less dense, harder and tougher than tungsten carbide, and nickel is more corrosion resistant that cobalt. Replacing the binder with Ni should improve the corrosion resistance. Since there are eutectics with a wide range of compositions in the C-Ni-V system, this system has potential for wear resistant alloys with ~VC as the discrete hard phase and the nickel solid solution as the binder. The aim of this work was to ascertain if eutectic microstructures with vanadium carbides could be beneficial to wear resistance. Phase studies confirmed the wide range of the eutectic alloys, with VC + (Ni), VC + σ′, VC + (V) and graphite + (Ni) and different morphologies. Preliminary wear tests showed results comparable to WC-Co alloys.

Стилі APA, Harvard, Vancouver, ISO та ін.

40

Guo, Jinxue, Ke Zhang, Yanfang Sun, Qingyun Liu, Lin Tang, and Xiao Zhang. "Efficient bifunctional vanadium-doped Ni3S2 nanorod array for overall water splitting." Inorganic Chemistry Frontiers 6, no. 2 (2019): 443–50. http://dx.doi.org/10.1039/c8qi01104d.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

41

Silin, Ivan, Devrim Gürsel, Dario Kremer, Klaus M. Hahn, and Hermann Wotruba. "Production of Vanadium Concentrate from a Small-Scale Lead Vanadate Deposit by Gravity Concentration: A Pilot Plant Study." Minerals 10, no. 11 (October 27, 2020): 957. http://dx.doi.org/10.3390/min10110957.

Повний текст джерела

Анотація:

The renewable energy revolution calls for high-performing materials and makes metallic compounds like lithium, cobalt, nickel and vanadium more and more critical. Innovations contribute to inventions and developments like vanadium redox flow batteries for large-scale energy storage systems with numerous technological advantages. Potential shortages of vanadium and its sources will contribute to turbulence in vanadium pricing. Nowadays, main sources and production sites of vanadium are located in Russia, China and South Africa. About 85% of vanadium applications are ferroalloys and high-performance alloys, which make production and price of vanadium dependent on the iron ore market. Partial covering of a potential vanadium demand may be achieved by an exploitation of lead vanadate ore deposits as alternative vanadium source. In the present work, the processing of a lead vanadate ore, mainly containing vanadinite and descloizite was investigated. Based on ore characterizations and preliminary beneficiation tests, a flowsheet was developed to design a small-scale processing plant, including comminution, dewatering and gravity separation. Preliminary laboratory tests and samples from the small-scale processing plant show promising results for the recovery of vanadium in a lead vanadate concentrate with a grade of 12 to 16% V2O5 and a recovery of 68 to 75%.

Стилі APA, Harvard, Vancouver, ISO та ін.

42

Yatsishina, E. B., V. M. Pozhidaev, O. A. Vasilyeva, O. P. Dyuzheva, Ya E. Sergeeva, V. M. Retivov, E. Yu Tereschenko, I. S. Kulikova, E. S. Vaschenkova, and E. I. Kozhukhova. "The determination of the origin of natural bitumen in mummifying resins of Ancient Egyptian mummies from the collection of the Pushkin Museum of Fine Arts." Fine Chemical Technologies 14, no. 4 (September 15, 2019): 45–58. http://dx.doi.org/10.32362/2410-6593-2019-14-4-45-58.

Повний текст джерела

Анотація:

This work presents the results of a study of the resins of seven Ancient Egyptian mummies from the collection of the Pushkin State Museum of Fine Arts using a complex of analytical methods: gas chromatography, atomic emission and mass spectrometry. Natural bitumen and beeswax were identified in the resins using the gas chromatography–mass spectrometry method. Based on the results of hydrocarbon distribution in the profiles of n-alkanes in the resin coatings of the mummies and naturally occurring bitumen, it was assumed that the Dead Sea bitumen was used. The gas chromatography–mass spectrometry studies of mummy resins in the selected ion mode (m/z 217 and 191) provided additional evidence of the bitumen’s geographic origin. Atomic emission spectrometry with inductively coupled plasma was used as a means to determine the content of microelements. Vanadium, nickel and molybdenum were found in the tar of five mummies. The determined relative amounts of vanadium, nickel, and molybdenum in the resins of the studied mummies showed a good correlation with the available data on the content of these elements in the Dead Sea bitumen, as well as the Fayum mummy resin based on this bitumen. The advantages of using the method of identifying bitumen in mummy resins based on relative content of vanadium, nickel, and molybdenum were revealed.

Стилі APA, Harvard, Vancouver, ISO та ін.

43

Yu, Yu, Pei Li, Xiaofang Wang, Wenyu Gao, Zongxu Shen, Yanan Zhu, Shuliang Yang, Weiguo Song, and Kejian Ding. "Vanadium nanobelts coated nickel foam 3D bifunctional electrode with excellent catalytic activity and stability for water electrolysis." Nanoscale 8, no. 20 (2016): 10731–38. http://dx.doi.org/10.1039/c6nr02395a.

Повний текст джерела

Анотація:

A novel electrode constructed by a uniform film of nanosized vanadium nanobelts on nickel foam has been developed, which exhibits excellent electroactivity and durability for HER, OER, and overall water splitting.

Стилі APA, Harvard, Vancouver, ISO та ін.

44

Gabets, Denis, Andrey Markov, Mikhail Guryev, Evgeny Pismenny, and Alina Nasyrova. "The effect of complex modification on the structure and properties of gray cast iron for tribotechnical application." Metal Working and Material Science 24, no. 4 (December 15, 2022): 165–80. http://dx.doi.org/10.17212/1994-6309-2022-24.4-165-180.

Повний текст джерела

Анотація:

Introduction. An approach based on the complex modification of cast irons makes it possible to improve its mechanical properties by changing the structure of the metal matrix, as well as the shape of graphite and its distribution. The aim of this work is to study the influence of alloying elements on the structure and mechanical properties of gray cast irons obtained for operation under friction wear conditions. Research methods. The paper describes the process of obtaining complex modified gray cast irons. Fractographic investigation of dynamically destroyed samples is carried out. Structure’s features of SCh35, ChMN-35M and SChKM-45 gray cast irons are studied. Tribological testing under sliding friction conditions is carried out. Results and its discussion. It is established that the complex modification of SCh35 gray cast iron with molybdenum, nickel and vanadium makes it possible to increase its hardness to 295 HB and tensile strength to 470-505 MPa. Alloying with nickel (0.4-0.7 wt.%), molybdenum (0.4-0.7 wt.%) and vanadium (0.2-0.4 wt.%) leads to a decrease in the interlamellar distance of perlite by 2 times, as well as to the metal matrix grain refining. The length of graphite lamellas of modified cast irons is reduced by 3-5 times. An additional effect on the tensile strength of cast iron is due to the alloying of ferrite with molybdenum and vanadium, which is fallen out along the boundaries of graphite inclusions. Alloying of ferrite with molybdenum and vanadium increases the level of its microhardness by 1.4 times in comparison with the α-phase of SCh35 serial cast iron. The results of tribotechnical tests of the designed materials are presented. Conclusions. It is established that the wear of specimens made of SChKM-45 cast iron is approximately 20-30% lower compared to cast iron SCh35 cast iron and 10-15% lower compared to ChMN-35M cast iron. Fractographic studies show that complex alloying with molybdenum, vanadium and nickel, contributing to the refining of pearlite colonies, leads to a decrease of the size of the cleavage facets.

Стилі APA, Harvard, Vancouver, ISO та ін.

45

Tikhonov, A. A., and D. A. Filippov. "Composite coatings of nickel-vanadium-phosphorus-nitride boron." IOP Conference Series: Materials Science and Engineering 441 (November 2, 2018): 012054. http://dx.doi.org/10.1088/1757-899x/441/1/012054.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

46

Raghavan, V. "Al-Ni-Ti-V (Aluminum-Nickel-Titanium-Vanadium)." Journal of Phase Equilibria & Diffusion 26, no. 3 (June 1, 2005): 281–83. http://dx.doi.org/10.1361/15477030523698.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

47

Gupta, K. P. "The Ni-Si-V (Nickel-Silicon-Vanadium) System." Journal of Phase Equilibria & Diffusion 26, no. 4 (August 1, 2005): 385–89. http://dx.doi.org/10.1361/154770305x56890.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

48

Raghavan, V. "Al-Ni-Ta-V (Aluminum-Nickel-Tantalum-Vanadium)." Journal of Phase Equilibria & Diffusion 27, no. 4 (August 1, 2006): 417. http://dx.doi.org/10.1361/154770306x116469.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

49

Raghavan, V. "Al-Nb-Ni-V (Aluminum-Niobium-Nickel-Vanadium)." Journal of Phase Equilibria & Diffusion 27, no. 5 (October 1, 2006): 512. http://dx.doi.org/10.1361/154770306x136476.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

50

Bácskai, Gy‐Né, B‐Né Vaskövi, Gy Vágvölgyi, P. Rudnai, M. Kertész, and Á. gulyás. "Vanadium and nickel contents of dustfall in Százhalombatta∗." International Journal of Environmental Health Research 4, no. 2 (June 1994): 113–14. http://dx.doi.org/10.1080/09603129409356806.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!