Phase diagram of the Ni–H system at high hydrogen pressures

Shizuku, Y.; Yamamoto, Souichi; Fukai, Yuh

doi:10.1016/s0925-8388(01)01861-8

Cited by 36 publications

(32 citation statements)

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“…Although from the graph the decrease in the intensity is not clear, numerical values show a decrease by 15%. This might be due to the formation of NiCl 4 2-phase from which nickel can be electrodeposited [11]. Furthermore, we find growth of small peak at 3386 cm -1 which is the OH stretching and indicates the presence of moisture in NiCl 2 .…”

Section: Resultsmentioning

confidence: 63%

“…When the deposition proceeds by progressive nucleation mechanism, Eq. 3 proposed by Hill and Scharifker [14] can be used to calculate diffusivity of NiCl 4 2-species.…”

Section: Discussionmentioning

confidence: 99%

“…However, the HCP nickel is considered to be metastable phase [1,2]. The nickel hydrogen phase diagram shows that at high pressures of greater than 100 Mpa there is considerable solubility of hydrogen [3,4]. At extremely high pressure of 1600-1900 Mpa, nickel forms a low hydrogen content a-Ni solid solution and a hydrogen rich nonstoichiometric b-Ni hydride phase [3].…”

Section: Introductionmentioning

confidence: 99%

“…There are few literatures available on the synthesis of HCP nickel. Carturan et al [6] synthesized HCP nickel by reacting Ni(II) complexes with K/B liquid alloy at 200°C whereas Mi et al [7] used NiCl 2 and reacted it with KBH 4 and ethelenediamine at temperatures ranging from 200 to 400°C. It was also shown that HCP nickel can be obtained by sputtering nickel in hydrogen atmosphere [8].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of face centered cubic and hexagonal closed packed nickel using ionic liquids

Lahiri

Das

2010

J Appl Electrochem

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Nickel was electrodeposited from NiCl 2 -1-ethyl-3-methylimidazolium chloride at various temperatures at a constant potential. It was observed that by varying the electrolysis temperature, face centered cubic (FCC) and hexagonal close packed structured (HCP) nickel could be produced. From spectroscopic studies, it could be said that H ? ions played an important role in the formation of HCP nickel. The hydrogen content in HCP nickel was found to be 1.2 wt%. From the Chronoamperometric studies, the diffusion coefficient of the electroactive species for the electrodeposition of nickel at 150°C was estimated to be 1.1 9 10 -5 cm 2 s -1 .

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Section: Resultsmentioning

confidence: 63%

“…When the deposition proceeds by progressive nucleation mechanism, Eq. 3 proposed by Hill and Scharifker [14] can be used to calculate diffusivity of NiCl 4 2-species.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis of face centered cubic and hexagonal closed packed nickel using ionic liquids

Lahiri

Das

2010

J Appl Electrochem

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“…При давлениях H 2 свыше 10 кбар, водород проникает в матрицу никеля, формируя твёрдые растворы. Ниже критической точки ( 660 К,  17 кбар) этот твёрдый раствор NiH x распадается с образованием обеднённого водородом твёрдого рас-твора и нестехиометрической обогащённой водородом -фазы гид-рида, где H занимает октаэдрические междоузлия [11,12]. Подобно гидридам железа и никеля, тройные соединения Fe-Ni-H не были обнаружены при нормальных условиях [13,14].…”

Section: 5unclassified

Thermodynamics of Formation of the Hydrogenated Permalloy under High Pressure on the Basis of the Approach from the First Principles

Krasovskii

2012

Usp. Fiz. Met.

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Исследована термодинамика образования гидрогенизированного пермал-лоя при высоком давлении в рамках первопринципного подхода. Термо-динамические потенциалы реакций образования фаз с различным содер-жанием водорода рассчитаны на основе теории функционала электронной плотности. Построена фазовая диаграмма системы пермаллой-водород в широком интервале давлений, которая подтверждает устойчивость таких соединений при заданных термодинамических параметрах. Сопоставле-ние с имеющимися экспериментальными данными демонстрирует хоро-шее согласие между теоретической и экспериментальной фазовыми диа-граммами.Досліджено термодинаміку утворення гідрогенізованого пермалою під ви-соким тиском у рамках першопринципного підходу. Термодинамічні по-тенціяли реакцій утворення фаз з різним вмістом водню розраховано на основі теорії функціонала електронної густини. Побудовано фазову діяг-раму системи пермалой-водень у широкому інтервалі тисків, яка підтвер-джує стійкість таких сполук при заданих термодинамічних параметрах. Зіставлення з наявними експериментальними даними демонструє хороше узгодження між теоретичною і експериментальною фазовими діяграмами.Thermodynamics of formation of the hydrogenated permalloy is explored at a high pressure within the scope of the ab initio approach. Thermodynamic potentials of reactions of formation of the phases with the various content of hydrogen are calculated on the basis of the density functional theory. The permalloy-hydrogen phase diagram in a wide range of pressures is plotted and confirms stability of such compounds at given thermodynamic parameters.Comparison with available experimental data shows a good agreement between the theoretical and experimental phase diagrams.Ключевые слова: водород в металлах, пермаллой, высокие давления, тер-модинамика насыщения металлов водородом.Успехи физ. мет. / Usp. Fiz. Met. 2012, т. 13, сс. 383-395 Îòòèñêè äîñòóïíû íåïîñðåäñòâåííî îò èçäàòåëÿ Ôîòîêîïèðîâàíèå ðàçðåøåíî òîëüêî â ñîîòâåòñòâèè ñ ëèöåíçèåé 2012 ÈÌÔ (Èíñòèòóò ìåòàëëîôèçèêè èì. Ã. Â. Êóðäþìîâà ÍÀÍ Óêðàèíû) Íàïå÷àòàíî â Óêðàèíå.

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ChemInform Abstract: Phase Diagram of the Ni—H System at High Hydrogen Pressures.

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Phase diagram of the Ni–H system at high hydrogen pressures

Cited by 36 publications

References 10 publications

Synthesis of face centered cubic and hexagonal closed packed nickel using ionic liquids

Synthesis of face centered cubic and hexagonal closed packed nickel using ionic liquids

Thermodynamics of Formation of the Hydrogenated Permalloy under High Pressure on the Basis of the Approach from the First Principles

ChemInform Abstract: Phase Diagram of the Ni—H System at High Hydrogen Pressures.

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