Mechanical and thermophysical properties of high-temperature IrxRe1−x alloys

Yadav, Navneet; Singh, Shakti Pratap; Maddheshiya, Ajit Kumar; Yadawa, Pramod Kumar; Yadav, Raja Ram

doi:10.1080/01411594.2020.1813290

Cited by 12 publications

(17 citation statements)

References 36 publications

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“…Further, orientation-dependent ultrasonic behavior is anomalous due to the combined effect of second-order elastic constants and density. Similar nature of the angle-dependent ultrasonic velocity is also reported for other hexagonal structured materials [35,36]. The Debye average velocity (V D ) variation with the angle is displayed in Fig.…”

Section: Ultrasonic Velocity and Allied Constraintssupporting

confidence: 81%

Temperature-Dependent Ultrasonic Properties of Semiconducting M2CO2 (M= Ti, Zr, Hf) MXenes

et al. 2022

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Here, we have studied the elastic, ultrasonic, mechanical, and thermal behavior of temperature-dependent hexagonal oxygen-functionalized M2CO2 (M= Ti, Zr, Hf) MXenes. The higher-order linear and nonlinear elastic constants, viz., second-order (SOECs), and third-order (TOECs) have been computed using the Lenard Jones interaction potential model. For mechanical characterization, bulk modulus (B), shear modulus (G), Young's modulus (Y), Pugh's ratio (B / G), Poisson's ratio, and anisotropic index are evaluated using SOECs. Born's stability and Pugh's criteria are used to examine the nature and strength of the MXenes in all the temperatures. For the investigation of anisotropic behavior and its thermophysical properties, temperature-dependent ultrasonic velocities and thermal relaxation time have been calculated along with different orientations from the unique axis of the crystal. The ultrasonic attenuation (UA) of a longitudinal and shear wave due to phonon-phonon (p-p) interaction and thermoelastic relaxation mechanism were investigated for these oxygen-functionalized MXenes. Thermal conductivity is a principal contributor to the behavior of UA due to p-p interactions. Our analysis suggests that semiconductor Ti2CO2 MXenes show superior mechanical properties to other oxygen-functionalized MXenes. Computed elastic, ultrasonic, and thermal properties are correlated to evaluate the microstructural behavior of the materials useful for industrial applications.

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Section: Ultrasonic Velocity and Allied Constraintssupporting

confidence: 81%

Temperature-Dependent Ultrasonic Properties of Semiconducting M2CO2 (M= Ti, Zr, Hf) MXenes

et al. 2022

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“…The anomalous behavior of angle dependent velocity is due to combined effect of SOECs and density. The property of the angle dependent velocity curves in this work is similar to nature of angle dependent velocity curve found for other hexagonal type's material [34,35]. Thus, the angle dependence of the velocities in nanostructured Gddoped ZnO nanorods is justified.…”

Section: Ultrasonic Velocity and Allied Constraintssupporting

confidence: 81%

“…'B/G' and 'σ' are the measure of brittleness and ductility of solid. If the value of σ = ≤0.26 and B/G = ≤1.75, the materials is generally brittle, otherwise it is ductile in nature [34,35]. Our finding of lower values of B/G and σ compared to their critical values indicates that nanostructured Gd-doped ZnO nanorods are brittle in nature.…”

Section: Higher Order Elastic Constantsmentioning

confidence: 75%

Mechanical and Thermal Properties of Gd-Doped ZnO Nanorods

2022

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“…Thus, ScTiZrHf high entropy alloy little Stiffness and bonding correspond to other alloys. Pugh's ratio (B/G) and Poisson ratio (σ) are measure of in nature with σ = 0.23 and Pugh's ratio = 1.52; if not it is ductile in nature [30,32]. Ours finding of lower values of Pugh's ratio and Poisson ratio compared to their critical values indicates that ScTizrHf is brittle in nature at room temperature.…”

Section: Higher Order Elastic Constantsmentioning

confidence: 72%

“…Young's modulus and Poisson's ratio are considered using values of bulk modulus and shear modulus respectively [30,31]. The following expressions were used for the evaluation of Y, B, G and σ [32].…”

Section: Theorymentioning

confidence: 99%

Elastic, Mechanical and Thermophysical properties of Single-Phase Quaternary ScTiZrHf High-Entropy Alloy

Rai

Chaurasiya

Yadawa

2021

Phys. Chem. Solid St.

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Consequent to the interaction potential model, the high-order elastic constants at high entropy alloys in single-phase quaternary ScTiZrHf have been calculated at different temperatures. Elastic constants of second order (SOECs) helps to determine other ultrasonic parameters. With the help of SOECs other elastic moduli, bulk modulus, shear modulus, Young’s modulus, Pugh’s ratio, elastic stiffness constants and Poisson’s ratio are estimated at room temperature for elastic and mechanical characterization. The other ultrasonic parameters are calculated at room temperature for elastic and mechanical characterization. The temperature variation of ultrasonic velocities along the crystal's z-axis is evaluated using SOECs. The temperature variation of the average debye velocity and the thermal relaxation time (τ) are also estimated along this orientation axis. The ultrasonic properties correlated with elastic, thermal and mechanical properties which is temperature dependent is also discussed. The ultrasonic attenuation due to phonon – phonon (p-p) interactions is also calculated at different temperatures. In the study of ultrasonic attenuation such as a function of temperature, thermal conductivity appears to be main contributor and p- p interactions are the responsible reason of attenuation and found that the mechanical properties of the high entropy alloy ScTiZrHf are superior at room temperature.

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Mechanical and thermophysical properties of high-temperature Ir_xRe_1−x alloys

Cited by 12 publications

References 36 publications

Temperature-Dependent Ultrasonic Properties of Semiconducting M<sub>2</sub>CO<sub>2</sub> (M= Ti, Zr, Hf) MXenes

Temperature-Dependent Ultrasonic Properties of Semiconducting M<sub>2</sub>CO<sub>2</sub> (M= Ti, Zr, Hf) MXenes

Mechanical and Thermal Properties of Gd-Doped ZnO Nanorods

Elastic, Mechanical and Thermophysical properties of Single-Phase Quaternary ScTiZrHf High-Entropy Alloy

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