Influence of doping elements (Cu and Fe) on the crystal structure and electrical resistivity of YNi3 and Y0.95Ni2

Myakush, O. R.; Babizhetskyy, Volodymyr; Myronenko, P.; Michor, H.; Bauer, E. D.; Kotur, B.

doi:10.30970/cma4.0181

Cited by 10 publications

(4 citation statements)

References 20 publications

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“…Upon Mn for Ni substitution in YxN (y ≥ 0.1), a structural transformation from a TmNi2-type superstructure to a C15 phase structure with disordered Y vacancies occurs. Such structural evolution ha reported in Y0.95Ni2−yBy (B = Cu, Fe, Al) systems [21,36]. Meanwhile, single-phas pounds with a C15 structure can be obtained by adjusting both the Y and Mn c (Y0.90Ni1.7Mn0.3 → Y0.825Ni1.7Mn0.3, e.g.).…”

Section: Mn Substitution Effects On Phase Occurrence and Structuresmentioning

confidence: 70%

Structural Evolution and Hydrogen Sorption Properties of YxNi2−yMny (0.825 ≤ x ≤ 0.95, 0.1 ≤ y ≤ 0.3) Laves Phase Compounds

Shen,

Paul-Boncour,

et al. 2024

Inorganics

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The YxNi2−yMny system was investigated in the region 0.825 ≤ x ≤ 0.95, 0.1 ≤ y ≤ 0.3. The alloys were synthesized by induction melting and corresponding annealing. The substitution of Mn for Ni (y = 0.1) favors the formation of a C15 structure with disordered Y vacancies against the superstructure of Y0.95Ni2. For y = 0.2 and 0.3, Mn can substitute in both Y and Ni sites. Single-phase compounds with a C15 structure can be formed by adjusting both the Y and Mn contents. Their hydrogen absorption–desorption properties were measured by pressure–composition isotherm (PCI) measurements at 150 °C, and the hydrides were characterized at room temperature by X-ray diffraction and TG–DSC experiments. The PCIs show two plateaus corresponding to the formation of crystalline and amorphous hydrides. The heating of the amorphous hydrides leads to an endothermic desorption at first and then a recrystallization into Y(Ni, Mn)3 and YHx phases. At higher temperatures, the Y hydride desorbs, and a recombination into a Y(Ni, Mn)2 Laves phase compound is observed. For y = 0.1, vacancy formation in the Y site and partial Mn substitution in the Ni site enhance the structural stability and suppress the hydrogen-induced amorphization (HIA). However, for a larger Mn content (y ≥ 0.2), Mn substitutes also in the Y sites at the expense of Y vacancies. This yields worse structural stability upon hydrogenation than for y = 0.1, as the mean ratio r(Y, Mn)/r(Ni/Mn) becomes larger than for y = 0.1 r(Y, ☐)/r(Ni/Mn).

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Section: Mn Substitution Effects On Phase Occurrence and Structuresmentioning

confidence: 70%

Structural Evolution and Hydrogen Sorption Properties of YxNi2−yMny (0.825 ≤ x ≤ 0.95, 0.1 ≤ y ≤ 0.3) Laves Phase Compounds

Shen,

Paul-Boncour,

et al. 2024

Inorganics

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“…Аналогічно до фази YxZr1-xNi2 вивчена тернарна сполука є у рівновазі з бінарною Er0,98Ni2. Цей факт засвідчує існування морфотропного ряду кубічних структур MgCu2 → TmNi2 -надструктура до структурного типу MgCu2 [23], виявленого раніше у працях [6,11,38,39].…”

Section: матеріали та методика експериментуunclassified

Phase equilibria in Er–Zr–Ni system at 800 С in ErNi–Zr–Ni region

Babizhetskyy¹,

Levytskyy²,

Myakush³

et al. 2021

Visnyk Lviv Univ. Ser. Chem.

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“…A large number of studies of the ternary Y-Ni-Cu system were dedicated to the crystal structures [4][5][6][7][8][9][10][11][12], magnetism [6], hydrogen sorption [7][8][9], and electrical [10,11] properties of the solid solutions based on the binary Y-Ni and Y-Cu compounds. However, there are some significant differences between the results of these studies.…”

Section: Abmentioning

confidence: 99%

The Y–Ni–Cu ternary system at 600°C

Myakush¹,

Babizhetskyy²,

Levytskyy³

et al. 2016

Chem. Met. Alloys

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The isothermal section of the Y-Ni-Cu phase diagram at 600°C has been investigated by means of X-ray diffraction and microstructure analyses. The homogeneity ranges of the solid solutions YNi 5-х Cu х (0 ≤ х ≤ 4.6) (structure type CaCu 5 , space group P6/mmm a = 0.48861(2)-0.50080(4), c = 0.39592(2)-0.40740(4) nm), Y 2 Ni 17-х Cu х (0 ≤ х ≤ 7.8) (structure type Th 2 Ni 17 , space group P6 3 /mmc, a = 0.8314(1)-0.8387(1), c = 0.8042(1)-0.8117(1) nm), YCu 6-7 Ni x (0 ≤ х ≤ 0.28) (structure type TbCu 7 , space group P6/mmm, a = 0.49470(4)-0.49540(4), c = 0.4133(4)-0.4227(4) nm) were refined. It was found that the maximal solubility of the third component does not exceed 3.8 at.% in Y 2 Cu 7 and less than 1 at.% in Y 2 Ni 7 , YCu, and YCu 4. The crystal structure of a single crystal of composition YNi 4 Cu (YNi 5-х Cu х solid solution) was investigated by X-ray diffraction: a = 0.4899(2), c = 0.3979(3) nm, R 1 = 0.028 for 57 independent reflections with I o ≥ 2σ(I o), wR 2 = 0.058. A new ternary compound, YNi 2.85-0.75 Cu 1.15-3.25 , of unknown structure with an extended homogeneity range, was found.

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Influence of doping elements (Cu and Fe) on the crystal structure and electrical resistivity of YNi3 and Y0.95Ni2

Cited by 10 publications

References 20 publications

Structural Evolution and Hydrogen Sorption Properties of YxNi2−yMny (0.825 ≤ x ≤ 0.95, 0.1 ≤ y ≤ 0.3) Laves Phase Compounds

Structural Evolution and Hydrogen Sorption Properties of YxNi2−yMny (0.825 ≤ x ≤ 0.95, 0.1 ≤ y ≤ 0.3) Laves Phase Compounds

Phase equilibria in Er–Zr–Ni system at 800 С in ErNi–Zr–Ni region

The Y–Ni–Cu ternary system at 600°C

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