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arXiv 1503.08250cond-mat.mtrl-sci
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电子work function随温度的变化及其对金属杨氏模量的影响

Variation in electron work function with temperature and its effect on the Young's modulus of metals

Reza Rahemi, Dongyang Li

摘要:

金属的性质从根本上取决于其电子行为,这在很大程度上由电子功函数($φ$)反映。最近的研究表明,金属材料的许多性能与$φ$直接相关,这可能为材料设计提供一个简单但基本的参数。由于材料的性能受温度的影响,在这篇文章中,提出了一个简单的模型来关联的功函数与温度,表示为$φ(T)=φ_{0} -γ\frac{(k_{B} T)^{2}}{φ_{0}} $,其中$γ$随晶体结构。这种$φ$ -T关系有助于在可行的电子基础上确定和理解金属性质对温度的依赖性。作为一个示例应用,所建立的关系被应用于确定金属的杨氏模量对温度的依赖性。所提出的关系与实验观察结果是一致的。

英文摘要:

Properties of metals are fundamentally determined by their electron behavior, which is largely reflected by the electron work function ($φ$). Recent studies have demonstrated that many properties of metallic materials are directly related to $φ$, which may provide a simple but fundamental parameter for material design. Since material properties are affected by temperature, in this article a simple model is proposed to correlate the work function with temperature, expressed as $φ(T)=φ_{0} -γ\frac{(k_{B} T)^{2}}{φ_{0}} $, where $γ$ varies with the crystal structure. This $φ$-T relationship helps determine and understand the dependence of metal properties on temperature on a feasible electronic base. As a sample application, the established relationship is applied to determine the dependence of Young's modulus of metals on temperature. The proposed relationship is consistent with experimental observations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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