论文标题
暴露于原子坐力光谱的大量辐照金属的微观结构
Microstructure of a heavily irradiated metal exposed to a spectrum of atomic recoils
论文作者
论文摘要
在低于空缺迁移开始的温度下，暴露于能量离子的金属会发展出动态波动的稳态微观结构。这些微观结构在渐近高暴露极限中的统计特性不是通用的，并且取决于入射离子的能量和质量。我们开发了一个模型，用于在Athermal条件下的离子辐射金属的微观结构，其中内部应力波动占据了结构进化的动力学。缺陷产生和重组之间的平衡不仅取决于剂量定义的全部暴露于辐射的总暴露，还取决于入射颗粒的能量。该模型预测高剂量极限中的缺陷含量是原子原子能量频谱的积分，发现低能量离子的损伤量明显高于高能离子。
At temperatures below the onset of vacancy migration, metals exposed to energetic ions develop dynamically fluctuating steady-state microstructures. Statistical properties of these microstructures in the asymptotic high exposure limit are not universal and vary depending on the energy and mass of the incident ions. We develop a model for the microstructure of an ion-irradiated metal under athermal conditions, where internal stress fluctuations dominate the kinetics of structural evolution. The balance between defect production and recombination depends sensitively not only on the total exposure to irradiation, defined by the dose, but also on the energy of the incident particles. The model predicts the defect content in the high dose limit as an integral of the spectrum of primary knock-on atom energies, with the finding that low energy ions produce a significantly higher amount of damage than high energy ions.
