梁永超,先刚,于邦毅,张铎恩

• 1:贵州大学大数据与信息工程学院

摘要(Abstract)：

以10~(11) K/s、10~(10) K/s两种冷速对富Ni的Fe_(10)Ni_(90)合金和富Fe的Fe_(90)Ni_(10)合金进行快速凝固,并采用原子平均势能、双体分布函数、配位数、3D可视化、最大标准团簇等方法研究了快速凝固过程中两种合金的微观结构随温度快速降低的演变。结果表明:在10~(10) K/s冷速下,两种合金的结晶温度一致,但Fe_(10)Ni_(90)合金的原子平均势能要低于Fe_(90)Ni_(10)合金,使得其双体分布函数的第一峰值要高于Fe_(90)Ni_(10)合金,表明Ni原子之间比Fe原子之间成键概率更高;在两种冷速下,Fe_(10)Ni_(90)合金的fcc晶体数目变化较大,Fe_(90)Ni_(10)合金的bcc晶体数目变化较小,而且由于二十面体和截边十面体的出现,Fe_(10)Ni_(90)合金出现了五重孪晶结构。

关键词(KeyWords)： Fe-Ni合金;分子动力学模拟;快速凝固;晶体微观结构;五重孪晶

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(11964005)

作者(Author): 梁永超,先刚,于邦毅,张铎恩

DOI: 10.13289/j.issn.1009-6264.2020-0302

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