Effect of N2 Flow on Microstructure and Properties of CrNx Film Prepared by Unbalanced Magnetron Sputtering on the Surface of Depleted Uranium
Source abstract
Abstract
金属铀的化学性质十分活泼, 极易发生氧化腐蚀. 为改善基体的抗腐蚀性能, 采用非平衡磁控溅射技术在金属铀表面制备了不同氮含量的CrN x 薄膜. 采用扫描电子显微镜(SEM)、X射线衍射技术(XRD)、X射线光电子能谱(XPS)、动电位极化曲线, 分别研究了薄膜形貌、物相结构、表面元素化学价态及抗腐蚀性能. 结果表明, 当氮流量为10 sccm时薄膜主要为体心立方的α-Cr, 随氮流量的增大, 薄膜转化为六方Cr 2 N和立方CrN结构, 其择优取向由Cr(110)转化为Cr 2 N(111)及CrN(200), 金属态Cr的含量逐渐减少, 氮化态Cr的含量增多, Cr2p3/2的结合能峰位逐渐向高结合能方向移动. CrN x 薄膜呈纤维状结构, 当氮流量增大到30 sccm时, 生成了Cr 2 N的密排结构, 有效改善了薄膜的致密性. 在金属铀表面制备CrNx薄膜后, 自然腐蚀电位增大, 腐蚀电流密度降低, 当氮流量增大到30 sccm时, 薄膜的自然腐蚀电位提高了近550 mV左右, 腐蚀电流密度降低约两个数量级, 有效改善了贫铀表面的抗腐蚀性能.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Nuclear Materials and Properties · Metal and Thin Film Mechanics · Fusion materials and technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (9)
Show source-provided references
1. Chang F C10.1016/0257-8972(91)90126-H ↗
2. Lin Jianliang10.1016/j.surfcoat.2010.11.039 ↗
3. Bland R D
4. Raveh A10.1016/0257-8972(95)02537-5 ↗
5. Lippitz A10.1016/j.surfcoat.2005.02.091 ↗
6. Han S10.1016/S0167-577X(02)00958-8 ↗
7. Elangovan T10.1016/j.mseb.2010.01.021 ↗
8. Liu T W10.1016/j.surfcoat.2006.09.126 ↗
9. Conde A10.1016/j.surfcoat.2006.08.110 ↗