Particularities of Radiation Defect Formation in Ceramic Barium Cerate

International Scientific Conference on "Radiation-Thermal Effects and Processes in Inorganic Materials"

材料科学;物理学

Khromushin, I.V.^1 ; Aksenova, T.I.^1 ; Tuseev, T.^2 ; Munasbaeva, K.K.^1 ; Ermolaev, Yu.V.^2 ; Ermolaev, V.N.^2 ; Seitov, A.S.^2

Institute of Nuclear Physics, Almaty

050032, Kazakhstan^1

Kazakh National Technical University, Almaty

050013, Kazakhstan^2

关键词: Acicular structures;    Blistering process;    High-energy ions;    Irradiated surface;    Neodymium doped;    Radiation defects;    Scanning electrons;    Structure and properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/81/1/012037/pdf
DOI  :  10.1088/1757-899X/81/1/012037

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The effects of irradiation with electrons, ions of noble gases (Ne, Ar, Kr) and oxygen on the structure and properties of neodymium-doped barium cerate have been studied using the methods of X-ray diffraction analysis, scanning electron and atomic force microscopy, thermal desorption spectroscopy. It was shown that irradiation by low-energy ions of noble gases stimulates the blistering processes on the sample surface, while the high-energy ions contribute to formation of the structures on the irradiated surface that resemble the various stages of spherulitegrowth. The similar structures were not observed in the case of irradiation with high-energy oxygen ions. According to the data on thermal desorption of water and oxygen molecules from the irradiated barium cerate it was supposed that irradiation by the noble gas ions promotes neodymium oxidation state change. It was noticed that the electron irradiation leads to the formation of the nano-sized acicular structures on the cerate surface.