Ultrasonic study on the elastic moduli of the NaTl (B32) structure

Kuriyama, K.; Saito, Shinroku; Iwamura, K.

doi:10.1016/0022-3697(79)90062-3

Cited by 40 publications

(15 citation statements)

References 26 publications

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“…3,60) InLi and AlLi exhibit large elastic anisotropies as described later. Therefore, the elastic moduli of these polycrystalline materials are sensitive to the number of grains and/or the texture.…”

Section: Resultsmentioning

confidence: 72%

“…This is because that the bond length of AlLi is shorter than those of Si and GaAs. 3,16) The sp 3 -like bond in AlLi consists with the elastic anisotropy of single crystal AlLi: the direction of the nearest-neighbor AlAl bonds is h111i in which the value of the Young's modulus is the highest as shown in Fig. 2.…”

Section: Resultsmentioning

confidence: 99%

“…Its lattice parameter has been determined by several researchers. [1][2][3][4] The structure of AlLi is composed of two sublattices, both Al and Li forming a diamond lattice and interpenetrating each other. If Li gives up its single valence electron and the charge is transferred from Li to more electronegative Al, Al has four electrons to form sp 3 bonds.…”

Section: Introductionmentioning

confidence: 99%

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Elastic Constants of AlLi from First Principles

2005

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The elastic stiffness coefficients of single crystal AlLi with cubic NaTl (B32) structure were calculated at 0 K from the first principles. The obtained elastic stiffness coefficients, in units of GPa, were c 11 ¼ 66:9, c 12 ¼ 38:2 and c 44 ¼ 51:7. Then the bulk modulus, Young's modulus, shear modulus and Poison's ratio were estimated for polycrystalline AlLi from the elastic stiffness coefficients. The Young's modulus for single crystal AlLi was the highest in the h111i direction. The formation of the sp 3 -like bond connecting the nearest-neighbor Al atoms was confirmed from the charge density distribution. The elastic anisotropy of AlLi was compared with those of the sp 3 bonded semiconductors such as Si and GaAs.

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Section: Resultsmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Elastic Constants of AlLi from First Principles

2005

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“…For LLTO-SG, the Young's modulus was determined by resonant ultrasound spectroscopy to be *192 GPa, confirming that the value determined by nanoindenation represents the true material value. The slight difference in modulus between LLTO-SG and LLTO-SS could be the result of microstructural variables, such as a mixture of phases, grain size, and porosity [28][29][30][31][32][33][34]. Young's modulus is expected to be independent of grain size at the grain size range used in this study [30,34,35].…”

Section: Young's Modulusmentioning

confidence: 94%

Mechanical properties of the solid Li-ion conducting electrolyte: Li0.33La0.57TiO3

et al. 2012

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Li 0.33 La 0.57 TiO 3 (LLTO) is a potential Li-ion conducting membrane for use in aqueous Li-air batteries. To be in this configuration its mechanical properties must be determined. Dense LLTO was prepared using a solidstate (SS) or sol-gel (SG) procedure and was hot-pressed to yield a high relative density material ([95 %). Young's modulus, hardness, and fracture toughness of the LLTO-SS and sol-gel LLTO-SG materials was determined and compared to other solid Li-ion conducting electrolytes. The Young's modulus for LLTO-SG and LLTO-SS was 186 ± 4 and 200 ± 3 GPa, respectively. The Vickers hardness of LLTO-SG and LLTO-SS was 9.7 ± 0.7 and 9.2 ± 0.2 GPa, respectively. The fracture toughness, K IC , of both LLTO-SG and LLTO-SS was *1 MPa m 1/2 ; the fracture toughness of LLTO-SG was slightly higher than that of LLTO-SS. Both LLTO-SG and LLTO-SS have a Young's modulus and hardness greater than the other possible solid Li-ion conducting membranes

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“…At room temperature, the experimental data are 71.81 J/mol K (C v of LiAl[44]) and 409 K (h of LiAl[45]). Unfortunately, for the other thermodynamic properties of Li, LiAl and Li 2 Al, there is no available experimental data or theoretical results for our comparison.…”

mentioning

confidence: 99%