De Haas-van Alphen effect in YAl<sub>2</sub>

Seitz, Eberhard

doi:10.1088/0305-4608/8/9/001

Cited by 26 publications

(13 citation statements)

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“…In the work of Hasegawa and Yanase [1], the Fermi surface and energy band structure of YAl 2 was investigated by calculation. The cross sectional area of the tenth-band Fermi surface agrees well with an experimental result of the de Hass-van Alphen effect measurement [2]. Bauer et al [3] studied the thermal conductivity of YAl 2 compound from 4.2 K to room temperature and found that the lattice thermal conductivity of YAl 2 is negligible for temperatures lower than 20 K as well as for temperatures above about 200 K. The standard molar enthalpy of formation of YAl 2 calculated by first principles, based on high temperature calorimeter data, is -152 kJ mol −1 at 1473 K, in the work of Jung et al [4].…”

Section: Introductionsupporting

confidence: 84%

Microstructure, properties and application of YAl2 intermetallic compound as particle reinforcements

Li¹,

Zhang²,

Niu³

et al. 2014

Materials Science and Engineering: A

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An yttrium aluminum (YAl 2 ) intermetallic compound ingot was prepared in an induction furnace under vacuum. The microstructure of YAl 2 ingot was characterized by optical microscopy, scanning electron microscopy, and X-ray diffraction. The load bearing response of YAl 2 intermetallic was investigated and compared with SiC ceramic by indentation combined with optical microscopy and scanning electron microscopy. Additionally, the tensile properties of the Mg-Li matrix composites reinforced with ultrafine YAl 2 particles fabricated by planet ball milling were tested.The results show that the intermetallic compound ingot in this experiment is composed of a main face-centered-cubic structure YAl 2 phase, a small amount of YAl phase, and minor Y and Al-rich phases. YAl 2 intermetallic compound has excellent stability and shows better capability in crack resistance than SiC ceramic. The YAl 2 intermetallic compound has better deformation compatibility with the Mg-14Li-3Al matrix than SiC reinforcement with the matrix, which leads to the superior resistance to crack for YAl 2p /Mg-14Li-3Al composite compared to SiC p /Mg-14Li-3Al composite.2

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Section: Introductionsupporting

confidence: 84%

Microstructure, properties and application of YAl2 intermetallic compound as particle reinforcements

Li¹,

Zhang²,

Niu³

et al. 2014

Materials Science and Engineering: A

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“…Indeed, this was suggested by Cuitiñ o and Ortiz [36] based on an enhanced vacancy concentration created by plastic deformation principally through multiple glide and dislocation intersection. The vacancy concentration generated by plastic deformation has been proposed by Seitz [37] and Mott [38][39][40] to vary linearly with strain e (a term accounting for the equilibrium concentration has been added here):…”

Section: Void Initiation Mechanismsmentioning

confidence: 99%

Growth and collapse of nanovoids in tantalum monocrystals

et al. 2011

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“…48,49 Here the free ion polarizabilities are changed by the additional Coulomb potential arising from the other ions. The polarizabilities are given by 13…”

Section: ͑14͒mentioning

confidence: 99%

The structure of alkali halide dimers: A critical test of ionic models and new ab initio results

Törring

Biermann

Hoeft

et al. 1996

The Journal of Chemical Physics

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The structure of alkali halide dimers: A critical test of ionic models and new ab initio results. T. Torring, S. Biermann, J. Hoeft, R. Mawhorter, R. J. Cave, and C. Szemenyei, J. Chem. Phys. 104, 8032 (1996) In semiempirical ionic models a number of adjustable parameters have to be fitted to experimental data of either monomer molecules or crystals. This leads to strong correlations between these constants and prevents a unique test and a clear physical interpretation of the fit parameters. Moreover, it is not clear whether these constants remain unchanged when the model is applied to dimers or larger clusters. It is shown that these correlations can be substantially reduced when reliable information about dimers is available from experiments or ab initio calculations. Starting with Dunham coefficients of the monomer potential determined from microwave measurements, we have calculated the monomer to dimer bond expansion and the bond angle without any additional adjustable parameter. Assuming that the overlap repulsion between nearest neighbors remains unchanged, the bond expansion is mainly determined by the simple Coulomb repulsion between equally charged ions and depends only very little on the effective ion polarizabilities. Deviation of the bond angle from 90°sensitively tests the difference of effective polarizabilities of the two ions. A comparison with previously available data and new ab initio MP2 results presented here for the heavy-atom containing dimers shows that bond angles can be modeled reasonably well with SeitzRuffa corrected Pauling polarizabilities while calculated bond expansions are much too long. This shows that changes of the overlap repulsion term must be considered for reliable predictions of the structure of dimers and larger clusters.

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De Haas-van Alphen effect in YAl₂

Cited by 26 publications

References 1 publication

Microstructure, properties and application of YAl2 intermetallic compound as particle reinforcements

Microstructure, properties and application of YAl2 intermetallic compound as particle reinforcements

Growth and collapse of nanovoids in tantalum monocrystals

The structure of alkali halide dimers: A critical test of ionic models and new ab initio results

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De Haas-van Alphen effect in YAl2

Cited by 26 publications

References 1 publication

Microstructure, properties and application of YAl2 intermetallic compound as particle reinforcements

Microstructure, properties and application of YAl2 intermetallic compound as particle reinforcements

Growth and collapse of nanovoids in tantalum monocrystals

The structure of alkali halide dimers: A critical test of ionic models and new ab initio results

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De Haas-van Alphen effect in YAl₂