离子束辅助沉积铌提高铀的抗腐蚀性能研究

Corrosion Resistance to the Uranium Metal Improved by Ion Beam Assisted Deposition

利用离子注入技术在铀表面进行了离子束辅助沉积铌和离子注入铌形成表面改性层,并对改性层的厚度、注入元素的分布进行俄歇电子能谱(AES)分析和表面相及结构的X射线衍射谱(XRD)分析,用电化学极化法测试抗腐蚀性能。结果表明:离子束辅助沉积表面改性层比离子注入表面改性层明显增厚,铀的耐蚀性得到进一步改善。最后讨论了注铌改性层耐蚀性提高的原因。

Surface optimization technology with ion implantation and ion beam assisted deposition are used to proceed uranium metal. Distribution with niobium are analyzed by Auger electron spectroscopy(AES) and Xray diffraction(XRD). After ion implantation and ion beam assisted deposition, the corrosion rate measured by electrochemical polarization becomes less than 4% and 1.3%, repectively. The modified surface layer by ion beam assisted deposition with niobium on the depleted uranium appears thicker than by ion implanted. Mechanisms of improvement of corrosion resistance abilities is also discussed. 