Study on the initial oxidation of uranium-niobium alloy   in oxygen atmosphere by XPS

FU Xiaoguo  LIU Kezhao  WANG Xiaolin  BAI Chaomao  ZHAO Zhengping

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Study on the initial oxidation of uranium-niobium alloy in oxygen atmosphere by XPS

更新时间：2021-03-12

- Study on the initial oxidation of uranium-niobium alloy in oxygen atmosphere by XPS
- NUCLEAR TECHNIQUES Issue 10, (2001)
- 作者机构：
  
  1. 中国工程物理研究院
  2. 中国工程物理研究院,绵阳,621900
- 作者简介：
- 基金信息：
  
  中国工程物理研究院基金 (990 5 6 7)
- DOI：
  CLC： O614.62
- Published：01 October 2001
- 稿件说明：
移动端阅览
[1]伏晓国,刘柯钊,汪小琳,柏朝茂,赵正平.铀铌合金在O_2气氛中氧化初期的XPS研究[J].核技术,2001(10):848-852.

FU Xiaoguo LIU Kezhao WANG Xiaolin BAI Chaomao ZHAO Zhengping. Study on the initial oxidation of uranium-niobium alloy in oxygen atmosphere by XPS[J]. Nuclear techniques, 2001, (10): 848-852.
[1]伏晓国,刘柯钊,汪小琳,柏朝茂,赵正平.铀铌合金在O_2气氛中氧化初期的XPS研究[J].核技术,2001(10):848-852. DOI：

FU Xiaoguo LIU Kezhao WANG Xiaolin BAI Chaomao ZHAO Zhengping. Study on the initial oxidation of uranium-niobium alloy in oxygen atmosphere by XPS[J]. Nuclear techniques, 2001, (10): 848-852. DOI：

摘要

采用X射线光电子能谱（XPS）分析研究了 2 98K时铀铌合金的清洁表面在O2 气氛中的原位氧化过程。通过分析反应各阶段U4f

Nb3d和O1s谱峰的变化

揭示了O2 在铀铌合金表面吸附解离后

优先与表面Nb原子和U原子结合生成NbO、UO2 -x和UO2

然后NbO进一步氧化为NbO2 和Nb2 O5

在氧化的不同阶段U和Nb分别向表面偏析

Abstract

The initial oxidation of uranium-niobium alloy in oxygen atmosphere at 298K was studied by X-ray photoelectron spectroscopy. The changes of U4f

Nb3d and O1s spectrum during in-situ oxidation indicated that the adsorption of oxygen on uranium-niobium alloy surface first led to the formation of UO 2

UO 2- x and NbO

then NbO 2 and Nb 2O 5 were detected with increasing exposure of oxygen. The segregation of uranium and niobium to the surface was observed at different oxidation stages.

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