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arXiv 0809.0198cond-mat.mtrl-scicond-mat.mes-hall
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液态Co,Nb,Zr和过冷二元合金的嵌入原子模型

An embedded-atom method model for liquid Co, Nb, Zr and supercooled binary alloys

Pascal Thibaudeau, Julian Gale

摘要:

本文用嵌入原子法系统地导出了Co、Nb和Zr金属的多体势参数。分析势方案使我们能够正确地再现内聚能和结构特性的纯金属和选定的合金利用一个小的参数集。对于足够的截止半径,随着对势平稳地变为零,使用分子动力学模拟计算Co、Nb、Zr和合金的径向部分和键角分布函数,确保与可用的实验数据在熔点之前具有良好的定量一致性。利用连续高斯函数分解和Honeycut-Andersen指数分析了原子的短程有序。

英文摘要:

The parameters of many-body potentials for Co, Nb and Zr metals, based on the embedded-atom method, have been systematically derived. The analytical potential scheme allows us to reproduce correctly the cohesive energies and structural properties of the pure metals and selected alloys making use of a small set of parameters. With a pair potential going smoothly to zero for a sufficient cutoff radius, radial partial and bond angular distribution functions for Co, Nb, Zr and alloys are computed using molecular dynamics simulations that ensure good quantitative agreement with the available experimental data up to the melting point. Atomic short range order is analysed in the light of consecutive Gaussian function decomposition and Honeycutt-Andersen indices.

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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