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Zr（Cr，V）₂ Laves相长周期堆垛结构的高分辨电子显微术观察

HREM OBSERVATION ON LONG-PERIOD STACKING STRUCTURE OF Zr（Cr,V）₂ LAVES PHASE

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【Author】 ZHOU Ou YAO Qiang SUN Jian School of Materials Science and Engineering,Shanghai Jiaotong University,Shanghai 200030

【机构】上海交通大学材料科学与工程学院；上海交通大学材料科学与工程学院上海 200030；上海 200030；

【摘要】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ZrCr₂ Laves相稳定性的影响进行了讨论．更多还原

【Abstract】 The microstructures of the annealed Zr（Cr,V）₂ Laves phase were studied using high- resolution electron microscopy（HREM）.The results show that the annealed Zr（Cr,V）₂ Laves phase has a lamellar microstructure under low magnification,and selected-area electron diffraction indicates the existence of a long-period structure.HREM and fast Fourier transformation further indicate that the structure of annealed Zr（Cr,V）₂ is C36（4H）combined with 8H and other transitional multilayer stacking structure.The effect of V on the stability of ZrCr₂ Laves phase was also discussed.更多还原