采用X射线光电子能谱(XPS)分析研究了烧结UC(包括钚的碳化物)样品的表面层结构.分析结果表明,经大气氧化的UC表层由表及里大致组成为:少量UO2+x→UO2与UC的混合物及少量自由碳→UC基体.UC的U4f7/2峰和Cls峰结合能分别为378.2 eV和282 eV.定量分析表明,UC清洁表面的C/U原子比约为1:1,这与UC的化学组成一致,但此时仍能探测到少量固溶氧存在.初步探讨了UC在大气环境中的氧化机理.
参考文献
| [1] | Frost B R T .The Carbides of Uranium[J].Journal of Nuclear Materials,1963,10:265. |
| [2] | Darryl P B;Terry C W .The U-Zr-C Termary Phase Diagram Above 2473 K[J].Journal of the American Ceramic Society,1993,76:1409. |
| [3] | Camagni P;Manara A;Landais E .Growth of Oxide Films onto Cleavage Faces of Crystalline UC[J].Surface Science,1968,10:332. |
| [4] | Mukerjee S K;Rama Rao G A;Dehadraya J V et al.The Oxidation of Uranium Monocarbide Mierospheres[J].Journal of Nuclear Materials,1994,210:97. |
| [5] | Allen G C;Tucker P M;Tyler J W .Oxidation of Uranium Dioxide at 298 K Studied by Using X-Ray Photoelectron Spectroscopy[J].Journal of Physical Chemistry,1982,86:224. |
| [6] | Asuvathraman R.;Ananthasivan K.;Mathews CK.;Rajagopalan S. .SURFACE STUDIES ON URANIUM MONOCARBIDE USING XPS AND SIMS[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,1995(1):25-30. |
| [7] | 伏晓国,刘柯钊,汪小琳,柏朝茂,赵正平,蒋春丽.O2在U和U-Nb合金表面吸附的XPS研究[J].金属学报,2001(06):575-578. |
| [8] | 伏晓国;汪小琳;郭烯军 et al.Electrochemical Corrosion Characteristics of Uranium-niobium Alloy in Aqueous Solutions[J].稀有金属材料与工程,2001,30(zk):262. |
| [9] | Schultz J C;Colmenares C A;Naegele J et al.X-Ray Photoelectron Spectroscopic Study of The Surface Reactions of UFe2 with O2,CO and CO2[J].Surface Science,1988,198:301. |
| [10] | Moulder J F;Stickle W F;Sobol P E.X 射线光电电子谱手册[M].USA:Perkin-Elmer Corporation,1992 |
| [11] | Dillard J G;Moers H;Klewe-Nebenius H et al.Adsorption and Reaction of I2 and CH3I with Uranium Monoearbide Surfaces[J].Journal of Physical Chemistry,1984,88:5345. |
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