A new phase MgNi3 synthesized by mechanical alloying

Liu, Guoyuan; Shen, Xi; Ran, Guang; Zuo, Kesheng; Li, Pengliang; Jing-en, Zhou

doi:10.1016/j.jallcom.2006.10.068

Cited by 14 publications

(8 citation statements)

References 9 publications

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“…MgNi3 compound (sp.gr. Pm3 m; a = 3.7185(5) Å) has an AlCu3-type structure and earlier it was synthesized by high-energy ball milling of a mixture of Mg and Ni metals [14]. We assume that in present study MgNi3 was synthesised already during the reactive ball milling and remained stable during the consecutive annealing at 1,000 and 800 °C.…”

Section: Xrd Characterization Of the Initial Intermetallic Alloys La0mentioning

confidence: 96%

LaNi5-Assisted Hydrogenation of MgNi2 in the Hybrid Structures of La1.09Mg1.91Ni9D9.5 and La0.91Mg2.09Ni9D9.4

et al. 2015

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This work focused on the high pressure PCT and in situ neutron powder diffraction studies of the LaMg2Ni9-H2 (D2) system at pressures up to 1,000 bar. LaMg2Ni9 alloy was prepared by a powder metallurgy route from the LaNi9 alloy precursor and Mg powder. Two La3−xMgxNi9 samples with slightly different La/Mg ratios were studied, La1.1Mg1.9Ni9 (sample 1) and La0.9Mg2.1Ni9 (sample 2). In situ neutron powder diffraction studies of the La1.09Mg1.91Ni9D9.5 (1) and La0.91Mg2.09Ni9D9.4 (2) deuterides were performed at 25 bar D2 (1) and 918 bar D2 (2). The hydrogenation properties of the (1) and (2) are dramatically different from those for LaNi3. The Mg-containing intermetallics reversibly form hydrides with Hdes = 24.0 kJ/molH2 and an equilibrium pressure of H2 desorption of 18 bar at 20 °C (La1.09Mg1.91Ni9). A pronounced hysteresis of H2 absorption and desorption, ~100 bar, is observed. The studies showed that LaNi5-assisted hydrogenation of MgNi2 in the LaMg2Ni9 hybrid structure takes place. In the La1.09Mg1.91Ni9D9.5 (1) and La0.91Mg2.09Ni9D9.

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Section: Xrd Characterization Of the Initial Intermetallic Alloys La0mentioning

confidence: 96%

LaNi5-Assisted Hydrogenation of MgNi2 in the Hybrid Structures of La1.09Mg1.91Ni9D9.5 and La0.91Mg2.09Ni9D9.4

et al. 2015

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“…In Mg-Ni binary alloy system, a new phase MgNi 3 with the same crystal lattice as AuCu 3 phase was formed by mechanical alloying. MgNi 3 phase had the cubic crystal lattice and the equilibrium lattice parameter was determined to be a = 3717, with the space group P m3m (No 221) [1]. Nickel (Ni) atoms were located at the facecentred positions and Magnesium (Mg) atoms at the corners of the cubic unit cell.…”

Section: Structural Propertiesmentioning

confidence: 99%

“…Nickel (Ni) atoms were located at the facecentred positions and Magnesium (Mg) atoms at the corners of the cubic unit cell. The unit cell structural model of the MgNi 3 compound is built according to the experimental data [1], as shown in Fig. 1.…”

Section: Structural Propertiesmentioning

confidence: 99%

“…The technological application of magnesium alloys has been a hot research topic in recent years. In Mg-Ni binary alloy system a new phase MgNi 3 was formed by mechanical alloying in Mg-50 at % Ni mixture powders milled for 40 h [1]. The intermetallic compound MgNi 3 belongs of the family of magnesium alloys, where the research on magnesium (Mg) based alloys is of substantial interest due to its low density (∼ 1.74 g/cm 3 ) and high specific strength and stiffness than many other engineering materials, including aluminium, steel, and polymer-based composites [2].…”

Section: Introductionmentioning

confidence: 99%

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Investigation on Structural, Elastic and Thermodynamic Properties of MgNi₃ Intermetallic Compound Using Density Functional Theory

Boucetta

2019

Acta Phys. Pol. A

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Magnesium based alloys belong to a class of materials, which have recently attracted great interest. In the present work, we report structural, elastic, and thermodynamic properties for the novel intermetallic compound MgNi3 calculated using plane-wave pseudo potential (PW-PP) method within density functional theory (DFT), with local density approximation (LDA) and generalized gradient approximation (GGA). The comparison of the calculated equilibrium lattice constants and experimental data showed very good agreement for both approximations. The elastic constants were determined from a linear fit of the calculated stress-strain function according to Hooke's law. Once the elastic constants were obtained, the bulk modulus B, shear modulus G, Young's modulus E, Poisson's ratio σ anisotropy factor A, and the ratio B/G for MgNi3 compound were deduced using Voigt-Reuss-Hill (VRH) approximation. Our calculated elastic constants indicate that the ground state structure of MgNi3 is mechanically stable. The calculation results also show that this intermetallic crystal is stiff, elastically anisotropic, and ductile material. The Debye temperature is also predicted from elastic constants. The temperature dependence of the enthalpy H, free energy F , entropy S, and heat capacity at constant volume Cv of MgNi3 crystal in a quasi-harmonic approximation are obtained from phonon density of states and discussed for the first report.

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“…However, the proportion of Mg to Ni is not easy to control, and Mg-Ni alloys with excessive Ni have reduced chargedischarge capacity [12]. In addition, Mg easily oxidized to form MgO phases during mechanical milling [13]. The formation of MgO phases may degrade the cycling performance of batteries.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Charge‐Discharge Characteristics of the Mg‐Ni Powder Electrodes at 55°C

Chen

Hung

Lui

et al. 2013

Journal of Nanomaterials

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Magnesium-nickel (Mg-Ni) powders are used as the anode materials for secondary lithium (Li) ion batteries. Mg-Ni powders with ratios of 1 : 1 (Mg : Ni) are prepared and their structure and electrochemical behavior at room temperature and 55°C are investigated. The results show that adding Ni powders to Mg powders can reduce the charge-discharge capacities and improve cycling life. In charge-discharge cycle testing at 55°C, the Li ion concentration gradually increased with increasing the duration of electrochemical reactions, indicating that the charge-discharge capacities increase with increment of cycling number. The formation of a solid electrolyte interface (SEI) layer restrains Mg ions from dissolving into the electrolyte and thus improves the charge-discharge capacities at high temperature.

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A new phase MgNi3 synthesized by mechanical alloying

Cited by 14 publications

References 9 publications

LaNi5-Assisted Hydrogenation of MgNi2 in the Hybrid Structures of La1.09Mg1.91Ni9D9.5 and La0.91Mg2.09Ni9D9.4

LaNi5-Assisted Hydrogenation of MgNi2 in the Hybrid Structures of La1.09Mg1.91Ni9D9.5 and La0.91Mg2.09Ni9D9.4

Investigation on Structural, Elastic and Thermodynamic Properties of MgNi₃ Intermetallic Compound Using Density Functional Theory

Improvement of Charge‐Discharge Characteristics of the Mg‐Ni Powder Electrodes at 55°C

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A new phase MgNi3 synthesized by mechanical alloying

Cited by 14 publications

References 9 publications

LaNi5-Assisted Hydrogenation of MgNi2 in the Hybrid Structures of La1.09Mg1.91Ni9D9.5 and La0.91Mg2.09Ni9D9.4

LaNi5-Assisted Hydrogenation of MgNi2 in the Hybrid Structures of La1.09Mg1.91Ni9D9.5 and La0.91Mg2.09Ni9D9.4

Investigation on Structural, Elastic and Thermodynamic Properties of MgNi3 Intermetallic Compound Using Density Functional Theory

Improvement of Charge‐Discharge Characteristics of the Mg‐Ni Powder Electrodes at 55°C

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Investigation on Structural, Elastic and Thermodynamic Properties of MgNi₃ Intermetallic Compound Using Density Functional Theory