论文部分内容阅读
钚是一种非常重要的核材料,其稳定性与力学特性研究对其在核工业中的应用有着重要意义.本文建立了研究钚镓合金稳定性的分子动力学模型,计算了面心立方(FCC)结构的?相钚的稳定性.计算结果表明,常温下钚会发生显著的晶格畸变和区域分解,但在700 K温度时可以保持较高的结构稳定性;通过掺杂镓元素可以提高钚在常温下的稳定性,且稳定性随着镓含量的增加而增强.我们进一步研究了钚镓合金的力学特性,发现其各向异性指数远高于同类结构金属铜、铝;增加镓含量可以减弱其各向异性,并增大其弹性模量.我们的结果有助于深入认识钚镓合金的结构特征和各向异性,这为钚基核材料的自辐射效应及老化机理的深入研究奠定了基础.
Plutonium is a very important nuclear material, its stability and mechanical properties of the nuclear industry for its application is of great significance.In this paper, the establishment of a study of the stability of plutonium alloy molecular dynamics model, FCC) structure. The calculated results show that plutonium can undergo significant lattice distortion and region decomposition at room temperature, but can maintain high structural stability at 700 K. By doping gallium elements, Improve the stability of plutonium at room temperature, and the stability increases with the increase of gallium content.We further study the mechanical properties of plutonium alloy, found that its anisotropy index is much higher than the similar structure of copper, aluminum; increase the gallium Content can weaken its anisotropy and increase its modulus of elasticity.The results of our study are helpful to understand deeply the structure and anisotropy of plutonium alloy, which is the self-radiation effect and aging mechanism of plutonium-based core material Research laid the foundation.