Impact of alloying on elastic, thermal and ultrasonic properties of wurtzite ScxAl1-xN

IF 2.3 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Physics Letters A Pub Date : 2024-10-28 DOI:10.1016/j.physleta.2024.130010

Anurag Singh , Devraj Singh , Sudhanshu Tripathi , Rabah Khenata

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Abstract

The influence of alloying on elastic, thermal and ultrasonic properties has been investigated for wurtzite (wz) structured Sc_xAl_1-xN alloy at room temperature along the unique axis. Firstly, the higher order elastic constants have been computed by means of Lennard-Jones potential model. The mechanical constants are estimated to determine mechanical properties like stability, stiffness, compressibility, hardness and ductility etc. The ultrasonic wave velocities have been appraised using the second order elastic constants (SOECs) at different angle of propagation, which have been further used to calculate thermal properties like Debye temperatures, thermal conductivities and thermal relaxation time of Sc_xAl_1-xN at room temperature (300 K). Finally, the coefficient of ultrasonic attenuation due to the thermoelastic relaxation process and due to the phonon-viscosity interaction process has been analyzed for wz- Sc_xAl_1-xN at 300K. The achieved results have been interpreted with existing results on wz- Sc_xAl_1-xN as well as with other wz materials.

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合金化对涡晶 ScxAl1-xN 的弹性、热和超声特性的影响

研究了合金化对室温下独特轴线上的沃特兹体（wz）结构 ScxAl1-xN 合金的弹性、热和超声特性的影响。首先，通过伦纳德-琼斯势能模型计算了高阶弹性常数。通过估算机械常数，确定了稳定性、刚度、可压缩性、硬度和延展性等机械特性。利用二阶弹性常数 (SOECs) 评估了不同传播角度下的超声波速度，并进一步用于计算 ScxAl1-xN 在室温（300 K）下的德拜温度、热导率和热弛豫时间等热特性。最后，分析了 wz- ScxAl1-xN 在 300K 时由于热弹性弛豫过程和声子-粘度相互作用过程引起的超声衰减系数。所取得的结果与现有的 wz- ScxAl1-xN 以及其他 wz 材料的结果进行了解释。

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来源期刊

Physics Letters A 物理-物理：综合

CiteScore

5.10

自引率

3.80%

发文量

493

审稿时长

30 days

期刊介绍： Physics Letters A offers an exciting publication outlet for novel and frontier physics. It encourages the submission of new research on: condensed matter physics, theoretical physics, nonlinear science, statistical physics, mathematical and computational physics, general and cross-disciplinary physics (including foundations), atomic, molecular and cluster physics, plasma and fluid physics, optical physics, biological physics and nanoscience. No articles on High Energy and Nuclear Physics are published in Physics Letters A. The journal''s high standard and wide dissemination ensures a broad readership amongst the physics community. Rapid publication times and flexible length restrictions give Physics Letters A the edge over other journals in the field.