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首页> 外文期刊>Crystal growth & design >Real-Time Observation of Growth and Orientation of Sm-Ba-Cu-O Phases on a Sm-211 Whisker Substrate by High-Temperature Optical Microscopy
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Real-Time Observation of Growth and Orientation of Sm-Ba-Cu-O Phases on a Sm-211 Whisker Substrate by High-Temperature Optical Microscopy

机译：高温光学显微镜实时观察Sm-211晶须衬底上Sm-Ba-Cu-O相的生长和取向

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摘要

Formation of various Sm-Ba-Cu-O phases grown under thermal equilibrium on (010) surfaces Of SM2BaCuO5 single-crystalline whiskers was observed in situ by means of a high-temperature optical microscope. At 1100 degrees C a needle-like phase, identified by X-ray diffraction and energy-dispersive spectroscopy analyses as Sm2Ba4Cu2Oy, grew epitaxially on the whisker (010) surface. After being cooled to 1050 degrees C (close to the peritectic temperature, T-p), the SmBa2Cu3Oy (Sm-123) phase nucleated and grew epitaxially in two different orientations: [100](Sm-123)//[001](Sm-211) and [110](Sm-123)//[001](Sm-211). During a slow reheating, the former type of Sm-123 grains preferentially decomposed, indicating its lower thermal stability with respect to the latter type of grains.
机译：通过高温光学显微镜原位观察到在SM2BaCuO5单晶晶须的（010）表面上在热平衡下生长的各种Sm-Ba-Cu-O相的形成。在1100摄氏度下，通过X射线衍射和能量色散光谱分析鉴定为Sm2Ba4Cu2Oy的针状相在晶须（010）表面上外延生长。冷却至1050摄氏度（接近包晶温度Tp）后，SmBa2Cu3Oy（Sm-123）相成核并在两个不同方向上外延生长：[100]（Sm-123）// [001]（Sm- 211）和[110]（Sm-123）// [001]（Sm-211）。在缓慢的再加热过程中，前一种类型的Sm-123晶粒会优先分解，这表明其相对于后一种类型的晶粒具有较低的热稳定性。

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