Investigation of Surface Oxidation of Uranium Monocarbide by in situ XPS Technique

Acta Chimica Sinica ›› 2005, Vol. 63 ›› Issue (7): 648-652. Previous Articles Next Articles

Original Articles

原位XPS技术研究碳化铀的表面氧化

伏晓国*，钟永强，汪小琳，刘柯钊，赵正平，刘春荣

(中国工程物理研究院四川绵阳919信箱71分箱绵阳 621900)

投稿日期:2004-03-29 修回日期:2004-12-09 发布日期:2010-12-10
通讯作者: 伏晓国

Investigation of Surface Oxidation of Uranium Monocarbide by in situ XPS Technique

FU Xiao-Guo*, ZHONG Yong-Qiang, WANG Xiao-Lin, LIU Ke-Zhao, ZHAO Zheng-Ping, LIU Chun-Rong

(China Academy of Engineering Physics, P.O. Box 919-71, Mianyang 621900)

Received:2004-03-29 Revised:2004-12-09 Published:2010-12-10
Contact: FU Xiao-Guo

Abstract

The initial oxidation of sintered UC samples in oxygen atmosphere at 298 K has been investigated in situ by X-ray photoelectron spectroscopy (XPS). Initially a "clean" UC surface was prepared by long time Ar^＋ bombardment. The changes of U4f, C1s and O1s spectra during oxidation indicate that the adsorption and reaction of oxygen on UC surface led to the formation of uranium dioxide and free carbon. Fast oxidation was found to be initially followed by a parabolic growth of an oxide film, suggesting that the oxidation be controlled by oxygen diffusion through the oxide layer. Quantitative analysis reveals that no significant segregations of uranium and carbon to the surface were observed at different oxidation stages.

Key words: in situ XPS, UC, O₂

Cite this article

FU Xiao-Guo*, ZHONG Yong-Qiang, WANG Xiao-Lin, LIU Ke-Zhao, ZHAO Zheng-Ping, LIU Chun-Rong. Investigation of Surface Oxidation of Uranium Monocarbide by in situ XPS Technique[J]. Acta Chimica Sinica, 2005, 63(7): 648-652.

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原位XPS技术研究碳化铀的表面氧化

Investigation of Surface Oxidation of Uranium Monocarbide by in situ XPS Technique

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