Melting and solidification of bismuth inclusions in aluminium
Melting and solidification of bismuth inclusions in aluminium
复制标题
铝中铋夹杂物的熔化和凝固
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
L. Sarholt
中科院分区：
文献类型：
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作者：
N. Thoft;J. Bohr;B. Buras;E. Johnson;A. Johansen;H. H. Andersen;L. Sarholt
用X射线衍射、原位卢瑟福背散射/沟道谱和透射电子显微镜等技术对铝晶体中铋包裹体的过冷进行了观察和研究。用不同的实验方法（和不同的样品）测量的结果非常一致。夹杂物在等于或低于铋体熔点的温度下熔化，并且固/液相变表现出100-150 K的滞后。平均夹杂物尺寸从几nm到几十nm不等。的X射线衍射熔化数据进行了讨论，在有关的不同现有的模型作为其大小的函数的夹杂物的熔化温度。由此导出夹杂物的近似尺寸分布。
Supercooling of crystalline bismuth inclusions in aluminium crystals has been observed and studied with different techniques: X-ray diffraction, in situ Rutherford backscattering/channelling spectrometry and transmission electron microscopy. The results of the measurements with different experimental methods (and on different samples) agree remarkably well. The inclusions melt at temperatures at or below the bismuth bulk melting point, and the solid/liquid phase transition exhibits a hysteresis of 100-150 K. Average inclusion sizes ranged from a few nm to some tens of nm. The X-ray diffraction melting data are discussed in relation to different existing models for the melting temperature of an inclusion as a function of its size. From this an approximate size distribution for the inclusions is derived.