Interfacial microstructure and thermal resistance of UO2/Mo composites fabricated by spark plasma sintering
| Autor: | Zhong Yi, Li Bingqing, Rui Gao, Bin Bai, Biaojie Yan, Yang Zhenliang, Wang Yun, Haifeng Song, Rongguang Zeng, Chu Mingfu, Cheng Liang, Pengcheng Zhang, Xueyan Zhu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Auger electron spectroscopy Materials science Process Chemistry and Technology Thermal resistance Composite number Energy-dispersive X-ray spectroscopy Spark plasma sintering 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials 0103 physical sciences Materials Chemistry Ceramics and Composites Interfacial thermal resistance Composite material 0210 nano-technology High-resolution transmission electron microscopy |
| Zdroj: | Ceramics International. 46:23797-23801 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2020.06.155 |
| Popis: | The development of UO2/Mo composite pellets with enhanced thermal conductivity (TC) has been considered to be a promising route for improving the safety of nuclear reactors. The interfacial microstructure and especially the interfacial thermal resistance (ITR) of UO2/Mo composites could dominate the effective thermal conductivity (ETC) of the composites. In this work, the interfacial microstructure of UO2/Mo composites fabricated by spark plasma sintering (SPS) was investigated by high-resolution transmission electron microscopy (HRTEM) with energy dispersive spectroscopy (EDS) and auger electron spectroscopy (AES). The results indicated that UO2/Mo interface was a semi-coherent interfacial microstructure with an orientation of ( 220 ) UO 2 / ( 110 ) Mo and a lattice misfit degree of 0.117. Furthermore, there were no distinct interfacial products at the UO2/Mo interface. Based on the structure characterized above, the calculated ITR of the UO2/Mo composite was on the order of approximately 10-9 m2K/W. |
| Databáze: | OpenAIRE |
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