Fabrication of ZrO2-based nanocomposites for transuranic element-burning inert matrix fuel

Nuclear Engineering and Technology

Malik A. Umer¹  Joon Hui Kim¹  Soon Hyung Hong¹  Ho Jin Ryu²  Qusai Mistarihi² 

[1] Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 291 Daehakro, Yuseong, Daejeon 305-701, South Korea;Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, 291 Daehakro, Yuseong, Daejeon 305-701, South Korea;

关键词: Carbon fiber;    Carbon foam;    Graphite;    Spark plasma sintering;    Thermal conductivity;    ZrO2-Based composites;   

DOI  :  10.1016/j.net.2015.05.003

来源: DOAJ

【 摘 要 】

ZrO2-based composites reinforced with 6.5 vol.% of carbon foam, carbon fiber, and graphite were fabricated using spark plasma sintering, and characterized using scanning electron microscopy and X-ray diffractometry. Their thermal properties were also investigated. The microstructures of the reinforced composites showed that carbon fiber fully reacted with ZrO2, whereas carbon foam and graphite did not. The carbothermal reaction of carbon fiber had a negative effect on the thermal properties of the reinforced ZrO2 composites because of the formation of zirconium oxycarbide. Meanwhile, the addition of carbon foam had a positive effect, increasing the thermal conductivity from 2.86 to 3.38 W m−1 K−1 at 1,100°C. These findings suggest that the homogenous distribution and chemical stability of reinforcement material affect the thermal properties of ZrO2-based composites.

【 授权许可】

Unknown