钨材料中缺陷的形成及演化规律

罗来马, 魏国庆, 刘祯, 朱晓勇, 吴玉程

Formation and Evolution of Defects in Tungsten Materials

LUO Laima, WEI Guoqing, LIU Zhen, ZHU Xiaoyong, WU Yucheng

图2 杂质原子形成点缺陷、不同W晶界的强化/脆化能量(ΔESE)与异质原子半径关系示意图[38]及过渡金属原子晶界的偏聚能量和强化能量的典型例子[38]

Fig.2 Schematic of the relationship between the formation of point defects by impurity atoms, strengthening/embrittling energies (ΔESE) at different W grain boundaries, and the radius of heteroatoms, as well as typical examples of the segregation energy (Eseg) and strengthening energy at transition metal atomic grain boundaries (a) three-dimensional schematic of impurity atoms embedded in the matrix lattice (b) point defects formed by impurity atoms (c) dependence of ΔESE on the metallic radii of solutes at their most favorable positions for Σ3(112), Σ5(310), Σ3(111), Σ5(210), and Σ11(323) GBs[38] (γ—GB energy) (d) Eseg and the strengthening energies ΔESE for 3d, 4d, and 5d transition metals (TM) atoms in different positions of a typical Σ3(111) GB[38]