基于分子动力学的He-Ne激光陀螺铟封铝-铟界面研究

发布时间：2018-06-02 05:19

本文选题：激光陀螺 + 铟封界面　；参考：《真空科学与技术学报》2017年01期

【摘要】：谐振腔铟封接处漏气导致放电条件改变是氦氖激光陀螺失效的直接原因之一。针对阴极铝-铟封接界面,基于分子动力学方法,采用MEAM原子作用势,依据工艺温度与压力条件,模拟铝-铟界面原子扩散的物理过程,结果显示界面层原子以一定速率进行相互扩散,形成金属间化合物,直至扩散达到平衡;以5.0×1010应变率沿垂直界面方向对模型进行拉伸加载,得到了铝-铟界面模型在拉伸方向的应力-应变曲线,结果表明界面屈服强度低于相同尺寸的单晶铝和单晶铟,屈服应变介于铝、铟两种材料之间。相比于现有的研究成果,旨在为进一步优化谐振腔电极铟封工艺提供理论依据。
[Abstract]:One of the direct reasons for the failure of He-Ne laser gyroscope is the leakage of gas in the indium seal of the resonator and the change of discharge conditions. Aiming at the cathodic Al-indium sealing interface, based on the molecular dynamics method, the atomic potential of MEAM is used to simulate the physical process of atomic diffusion at the Al-indium interface according to the process temperature and pressure conditions. The results show that the interfacial atoms diffuse with each other at a certain rate to form intermetallic compounds until the diffusion reaches equilibrium, and the model is subjected to tensile loading at a strain rate of 5.0 脳 1010 along the vertical interface. The stress-strain curves of Al-indium interface model in the tensile direction are obtained. The results show that the interfacial yield strength is lower than that of single crystal aluminum and indium with the same size, and the yield strain is between aluminum and indium. Compared with the existing research results, the aim is to provide a theoretical basis for further optimizing the indium sealing process of the resonant cavity electrode.
【作者单位】：合肥工业大学机械工程学院真空科技与装备研究所;
【基金】：中央高校基本科研业务经费项目(No.JZ2015HGBZ0465) 中国博士后科学基金面上项目(No.2016M590041)
【分类号】：O647.11;TN96

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