Effect of size, shape, orientation, pressure and temperature on elastic properties of nanomaterials

IF 1.1 4区工程技术 Q4 Engineering

High Temperatures-high Pressures Pub Date : 2022-01-01 DOI:10.32908/hthp.v51.1009

Komal Rawat, M. Goyal

引用次数: 0

Abstract

A theoretical formulism is developed to study the impact of temperature and pressure on nanomaterials. Here Shankar equation of state for solids is extended using an analytic model given by Jiang for nanomaterials. The effect of size, dimension and orientation of nanomaterial on the elastic properties is studied. Bulk modulus is found to decrease as the size of nanomaterials is increased for inward relaxation whereas increase in bulk modulus of nanomaterials with increase in size is found for outward relaxation. Volume expansion coefficient variation is inverse of bulk modulus. The volume decreases as the pressure on the nanomaterials is increased at room temperature, however, volume expansion occurs in nanomaterials with increase in temperature. The nanomaterials of Cu, Ag, Ni, ZnO, SnO2, CeO2, TiO2, ZrO2 and AlN are considered in the present study. The present model results are found in good agreement with the available experimental and theoretically simulated results which justify the present model theory.

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尺寸、形状、取向、压力和温度对纳米材料弹性性能的影响

建立了研究温度和压力对纳米材料影响的理论公式。用Jiang给出的纳米材料的解析模型对固体的Shankar状态方程进行了扩展。研究了纳米材料的尺寸、尺寸和取向对其弹性性能的影响。体积模量随着纳米材料尺寸的增大而减小，而体积模量随着纳米材料尺寸的增大而增大，而体积模量随着纳米材料尺寸的增大而增大。体积膨胀系数的变化与体积模量成反比。在室温下，纳米材料的体积随压力的增加而减小，但随着温度的升高，纳米材料的体积发生膨胀。本文研究了Cu、Ag、Ni、ZnO、SnO2、CeO2、TiO2、ZrO2和AlN等纳米材料。模型结果与已有的实验和理论模拟结果吻合良好，证明了模型理论的正确性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

High Temperatures-high Pressures THERMODYNAMICS-MECHANICS

CiteScore

1.00

自引率

9.10%

发文量

期刊介绍： High Temperatures – High Pressures (HTHP) is an international journal publishing original peer-reviewed papers devoted to experimental and theoretical studies on thermophysical properties of matter, as well as experimental and modelling solutions for applications where control of thermophysical properties is critical, e.g. additive manufacturing. These studies deal with thermodynamic, thermal, and mechanical behaviour of materials, including transport and radiative properties. The journal provides a platform for disseminating knowledge of thermophysical properties, their measurement, their applications, equipment and techniques. HTHP covers the thermophysical properties of gases, liquids, and solids at all temperatures and under all physical conditions, with special emphasis on matter and applications under extreme conditions, e.g. high temperatures and high pressures. Additionally, HTHP publishes authoritative reviews of advances in thermophysics research, critical compilations of existing data, new technology, and industrial applications, plus book reviews.