【摘 要】
:
Auger Electron Spectroscopy was used to characterize the initial stages of the oxidation of Ce-5% La alloy in an oxygen atmosphere at low pressure( ~ 10-6 Pa) an
【机 构】
:
China Academy of Engineering Physics
论文部分内容阅读
Auger Electron Spectroscopy was used to characterize the initial stages of the oxidation of Ce-5% La alloy in an oxygen atmosphere at low pressure( ~ 10-6 Pa) and room temperature after the surface is cleaned by Ar+ ion bombardment.It is shown that exposure of clean cerium to oxygen causes the appearance and development of three new Auger peaks at 97,662 and 676 eV, which steadily grow during oxidation of cerium.Upon oxygen dose less than 20 L,a semi-protective layer of oxide forms on the surface of cerium and its growth follows a logarithmic relationship.With further exposure of oxygen, the oxide film grown in the previous stage becomes thicker and the uptake of oxygen reaches saturation at oxygen exposure of 25 L,and the oxide film mainly consists of Ce2O3.
其他文献
Twelve samples of Co-Cu/Al2O3 were prepared by impregnating Al2O3 with cobalt salt followed by copper salt or vice versa. The composition of the prepared sample
By using high pure Magnesium (99.9 wt% )as matrix and multi-walled bended carbonnanotubes ( CNTs ) as reinforced phase, carbon nanotubes/magnesium matrix compos
A stochastic model coupled with transient calculations for the distributions of temperature, solute and velocity during the solidification of binary alloy is pr
Ni-ZrO2 nanocomposite coatings with monodispersed ZrO2 nanoparticles were prepared from the composite plating bath containing dispersant under DC electrodeposit
The synthesis and luminescence properties of Zn2 SiO4: Mn phosphor layers on spherical silica spheres, i.e.,a kind of core-shell complex phosphor, Zn2SiO4: Mn@
The temperature dependence of magnetization of intermetallic compounds molecular field theory (MFT)were studied and the results were consistent with the experim
In this paper, the stochastic particle-trajectory model is proposed for simulating the dynamic behavior of circulating fluidized bed (CFB). In our model, the mo
(001)La0.5 Sr0.5MnO3 +δ films on (001)LaA1O3 substrates were prepared by using a RF magnetron sputtering with powder target.At low temperature, the films exhib
The reaction of the mixed rare earth concentrate including monazite ( REPO4 ) and bastnaesite ( REFCO3 )decomposed by CaO and NaCl additives at the temperature
Al-Cr-pillared montmorillonite was synthesized by using bentonite and Al-Cr pillaring solutionsas starting materials. The basal spacing and specific surface are