Diffusion of insoluble carbon in zirconium oxides
Diffusion of insoluble carbon in zirconium oxides
复制标题
不溶性碳在氧化锆中的扩散
DOI：
10.1134/s0021364011010085
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发表时间：
2011
期刊：
影响因子：
1.3
通讯作者：
U. Koester
中科院分区：
文献类型：
--
作者：
V. Vykhodets;T. Kurennykh;A. G. Kesarev;M. V. Kuznetsov;V. V. Kondrat'ev;C. Hülsen;U. Koester
在900-1000 ℃温度范围内，得到了不溶性碳在氧化锆中的扩散系数。没有关于不溶性杂质扩散的公开数据;这些数据对于扩散理论和核技术是当前感兴趣的。用离子注入法在氧化物中引入了示踪原子13 C，并分析了样品在空气中退火过程中示踪原子13 C的发射动力学。测量已使用核微量分析和X射线光电子能谱的方法进行。的扩散活化能为2.7 eV和碳扩散系数是约6个数量级小于相同系统中的氧自扩散。这一结果表明碳在氧化物中的扩散性质存在强烈的反常现象。因此，氧化锆不能用于某些核技术，特别是作为短寿命碳同位素加速器的源材料。
The diffusion coefficient of insoluble carbon in zirconium oxides has been obtained for the temperature range of 900–1000°C. There are no published data on the diffusion of insoluble impurities; these data are of current interest for the diffusion theory and nuclear technologies. Tracer atoms 13C have been introduced into oxides by means of ion implantation and the kinetics of their emission from the samples in the process of annealing in air has been analyzed. The measurements have been performed using the methods of nuclear microanalysis and X-ray photoelectron spectroscopy. The diffusion activation energy is 2.7 eV and the carbon diffusion coefficient is about six orders of magnitude smaller than that for oxygen self-diffusion in the same systems. This result indicates the strong anomaly of the diffusion properties of carbon in oxides. As a result, zirconium oxides cannot be used in some nuclear technologies, in particular, as a material of sources for accelerators of short-lived carbon isotopes.