应用高分辨电子显微术对退火态Zr(Cr, V)2 Laves相的显微结构进行了观察.结果表明退火态Zr(Cr, V)2 Laves相在低倍显微观察下呈现层片状组织, 并存在长周期堆垛结构; 高分辨电镜和快速Fourier变换分析证明, 退火态Zr(Cr, V)2长周期结构为C36(4H)结构, 同时存在8H堆垛结构和少量其它过渡性多层堆垛结构. 并就合金元素V对Zr(Cr, V)2 Laves相稳定性的影响进行了讨论.
The microstructures of annealed Zr(CrV)2 Laves-phase intermetallic compound were studied using high-resolution transmission electron microscope (HRTEM). The results show that annealed Zr(CrV)2 exhibits a lamellar microstructure under low magnification and character of long-period stacking structure as well. Further studies by HRTEM and Fast Fourier Transformation (FFT) indicate that the structure of annealed Zr(CrV)2 is C36 combined with eight-layer and six-layer long-period stacking structure. The effect of V on the stability of ZrCr2 Laves phase was finally discussed in this paper.
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