Kinetics of evaporation of beaded Ag film on sapphire and on alumina scale
Kinetics of evaporation of beaded Ag film on sapphire and on alumina scale
复制标题
蓝宝石和氧化铝鳞片上珠状银膜的蒸发动力学
DOI：
10.1063/1.363016
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
D. Beke
中科院分区：
文献类型：
--
作者：
G. Erdélyi;M. Barkóczi;E. Moya;H. Giordano;I. Beszeda;B. Aufray;D. Beke
在822-973K温度范围内，用扫描电子显微镜和俄歇能谱研究了蓝宝石和氧化铝上的珠状银膜的形貌变化，发现银层的有效厚度的减小和边界的移动可以归因于银的蒸发进入气相。根据Kaganovskii和Beke提出的模型对实验结果进行了分析。结果表明，该过程受表面扩散控制，并由实验数据推导出表面传质系数与温度的关系。
Morphological changes of beaded Ag film on sapphire and on alumina scale were investigated by means of scanning electron microscopy and Auger spectroscopy in the temperature range of 822–973 K. It was found that the decrease of the effective thickness and the shift of the boundary of the layer can be attributed to the evaporation of silver into the gas phase. Experimental results were analyzed in terms of the model developed by Kaganovskii and Beke. Our results show that the process is controlled by surface diffusion and temperature dependence of the surface mass transport coefficients is deduced from the experimental data.