In a paper recently published in Nature Communications, Mirica and postdoctoral researcher Hanah Na report their work on the development of a completely …
The catalytic activity of the nickel complex [(dcype)Ni(COD)] (e) (dcype: 1,2-bis(dicyclohexyl-phosphine)ethane, COD: 1,5-cyclooctadiene), towards transfer hydrogenation (TH) of carbonyl compounds ...
Vapor-trigged crystal to crystal transformation between a discrete trinuclear complex [Ni3 (sih)2 (py)8] and a two-dimensional (2D) coordination polymer [Ni3 (sih)2 (py)2]n·DMF·H2O was ...
4. Élaboration du nickel (Chapitre I.12.) 11 5. Élaboration du cuivre (Chapitre I.13.) 14 6. Élaboration du zinc (Chapitre I.14.) 15 7. Élaboration du titane et du zirconium (Chapitre I.15.) 16 8. Les opérations unitaires et les transformations chimiques mises en jeu 18 03_TableMatieresTDM.fm Page VII Wednesday, January 23, 2013 3:44 PM
Abstract. Nickel sulphide inclusions are known to be responsible for delayed fracture in tempered glasses due to phase transformation within the inclusion. Microstructural identification of the phase transformation mechanisms in the Ni–S system close to the NiS composition were carried out on a series of partially transformed states.
Here, a new disk Nickel-base superalloy is designed to take advantage of strengthening atomic-scale dynamic complexions. This local phase transformation strengthening provides the alloy with a ...
1. Both nodular σ phase and platelet η phase were found in the as-cast microstructure of a polycrystalline nickel-based superalloy. High Ti/Al ratio in the interdendritic region has favored their formation. 2. The nodular σ phase was metastable and transformed into Cr-rich γ phase during solution treatment.
Raney nickel catalysts have been tested in the transformation of glucose into sorbitol through a hydrogen transfer pathway in the presence of short chain alcohols. Comparison between different sacing alcohols evidenced that catalytic hydrogen transfer (CHT) was only possible from ethanol under the tested neutral conditions. …
Beginning in the 1970s, nickel found extensive use both for cross-coupling and reactions of alkenes and alkynes, such as nucleophilic allylation, oligomerization, cycloisomerization and reductive...
L'invention concerne le domaine de la transformation de minerais de latérite (nickel oxydé) contenant du nickel, du cobalt et du fer. Le procédé de transformation comprend la production d'une matière première ferronickel (loup ferronickel ou fonte nickelée) par des procédés correspondants et le raffinage de la matière première ferronickel dans un four …
Nickel–cobalt layered double hydroxides (NiCo-LDHs) have been widely used as supercapacitor materials, and their performance can also be improved by doping engineering. However, the systematic study of halogen anion (X–)-modified NiCo-LDH has rarely been reported. In this study, X– were used to modify nickel–cobalt carbonate …
The reason is that sodium sulfate can destroy the stable structure of nickel ferrite (NiFe 2 O 4) and make it transform into nickel sulfate. ... Song L, Du J, Xiao Z, Jiang P, Cao Z, Zhu H (2020) Research progress on the surface of high-nickel nickel–cobalt–manganese ternary cathode materials: a mini review. ...
From the above experimental results, it can be seen that the nickel content plays an important role in the phase transformation tendency during mechanical alloying of Fe–Ni powders. For nickel content ⩽30 wt.% a martensitic transformation takes place, while for Fe–35Ni the reverse transformation of martensite into austenite occurs.
Challenges. Nickel plants are some of the most complex metallurgical facilities in the world. A multitude of challenges and roadblocks can converge when companies try to design, build—and ultimately run—these mammoth operations. For executives and shareholders who scrutinize every capital expenditure and expect a return on every investment ...
The phenomenological theory of martensitic transformations is applied to the various observed transformation modes in the shape memory alloy nickel-titanium. Since the martensitic phase has a crystal structure which can be considered to be a monoclinic distortion of the orthorhombic B19 structure of gold-cadmium and is twinned internally, a ...
2.1 Preparation of NPO Nanowires. NPO nanowires were prepared by hydrothermal reaction. Specifically, Nickel (II) nitrate hexahydrate (Ni(NO 3) 2 ∙6H 2 O, CSR, 98%) and Disodium hydrogen phosphate dodecahydrate (Na 2 HPO 4 ∙12H 2 O, Beijing Shiji, 99%) were used as precursors. 10 mL of 0.2 M Ni(NO 3) 2 ∙6H 2 O and 10 …
The development of oxygen evolution reaction (OER) catalysts with high activity and high stability through convenient and economical methods is greatly important for the promotion of hydrogen energy based on electrolysis technology. Herein, by using an unconventional high electrodeposition potential, novel petal-like clusters constructed by …
Nickel is an important industrial catalyst and is typically produced by reduction of nickel oxide (NiO). 1−5 This metal is also a promising oxygen carrier in chemical looping
Here we introduce a new 'phase-transformation strengthening' mechanism that resists high-temperature creep deformation in nickel-based superalloys, where specific alloying elements inhibit the ...
This study proposed a strategy to stabilize nickel (Ni) via phase transformation into stable crystal structures through ceramic sintering. The Ni sludge was collected, and then fired with two ...
Transformation des réseaux métalliques sous l'influence des éléments d'insertion: Transformation du réseau du nickel sous l'influence de l'azote. Nobuzo Terao 1 & Aurel Berghezan 1 Conference paper
Designing earth-abundant electrocatalysts with high performance towards water oxidation is highly decisive for the sustainable energy technologies. This study develops a facile natural corrosion approach to fabricate nickel-iron hydroxides for water oxidation. The resulted electrode demonstrates an outstanding activity and stability with …
Electroless nickel-phosphorus deposits with 5–8 wt% P and 3–5 wt% P were analysed for the effects of continuous heating on the crystallization kinetics and phase transformation behaviour of ...
Download scientific diagram | Procédure du traitement du minerai de nickel (Source : SLN). from publication: Tome 6 - Exploitation minière et traitement des minerais | En 2015, le ministre en ...
Article Heats of Formation and of Transformation in the System Nickel-Cobalt-Chromium was published on December 1, 1979 in the journal International Journal of Materials Research (volume 70, issue 12).
Nickel-based superalloys are primarily designed for critical high-temperature energy and aerospace applications such as in jet engine turbine disks 1.Throughout the last century, this alloy system ...
• Lors d'une transformation nucléaire, les noyaux des atomes sont modifiés.Mais il y a conservation du nombre de masse A (qui représente le nombre de nucléons) et il y a conservation du nombre de charge Z qui …
La grande majorité du cobalt mondial provient de la République démocratique du Congo, le nickel d'Indonésie, le lithium d'Australie, le cuivre du Chili et les terres rares de Chine.
Le développement de l'industrie du nickel et la transformation de la valeur environnementale en NouvelleCalédonie. Abstract: New Caledonia is characterized by cultural diversity, and human occupation of the territory is divided. A Melanesian, Kanak agrarian society (about 40% of the total population), and a largely urban society, of …
Before discussing each class of transformation, a survey of nickel's characteristic ... G. Action des organomagnesiens sur les alcools allyliques en presence de complexes du nickel: I. Synthese ...
The sequence of phase transformations was found to be: amorphous phase→intermediate metastable phases+stable Ni 3 P phase (+f.c.c. nickel)→stable Ni 3 P phase (+f.c.c. nickel). Electron microprobe analysis was carried out on the 16 wt.% P deposit and showed that the iron content in the deposit was affected by heating processes.
Le réchauffement climatique est dû pour 20 % aux émissions de CO 2 provenant du secteur industriel. Dans ce contexte, beaucoup d'usines tentent de stocker leurs rejets de CO 2. C'est ce que ...
Mirica and Na believe their new class of tridentate pyridinophane ligands (R N3) can lead to the development of new nickel catalysts and are a practical platform for detailed mechanical studies of ...
Extraction and refining. The extraction of nickel from ore follows much the same route as copper, and indeed, in a number of cases, similar processes and equipment are used. …
Le développement de l'industrie du nickel et la transformation de la valeur environnementale en NouvelleCalédonie. Authors: Matthias Kowasch. Pädagogische …
Article 29 March 2021. Recent Progress in Hydrometallurgical Processing of Nickel Lateritic Ore. Article 22 August 2022. Extraction of Copper and Nickel from Low …