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Article

Effects of Bi2O3 Doping on the Mechanical Properties of PbO Ceramic Pellets Used in Lead-Cooled Fast Reactors

Key Laboratory of Passive Nuclear Power Safety and Technology, North China Electric Power University, Beijing 102206, China
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Materials 2019, 12(12), 1948; https://doi.org/10.3390/ma12121948
Received: 24 April 2019 / Revised: 12 June 2019 / Accepted: 12 June 2019 / Published: 17 June 2019
In this paper, the effects of Bi2O3 doping on the mechanical properties of PbO ceramic pellets were studied. Different ratios of Bi2O3/PbO (i.e., xBi2O3-(1−x) PbO, where x is 0, 1, 3, 5, or 7 wt.%) were fabricated and sintered at 570, 620, and 670 °C. Mechanical properties including density, hardness, flexural strength, and sintering of PbO were studied for each of the aforementioned compositions. Phase composition, microstructure, and the worn surfaces of the composites were characterized by scanning electron microscopy and X-ray diffraction (XRD). The XRD analysis revealed that a solid solution formed in the composite ceramic. The best suited conditions of temperature and doping of Bi2O3 for optimal sintering were found to be 620 °C and 3 wt.%, respectively. The hardness of the 3 wt.% Bi2O3-97 wt.% PbO ceramic was found to be 717 MPa, which is about four times higher than the hardness of pure PbO. In addition, the strength of the composites was found to be 43 MPa, which is two times higher than that of pure PbO. The integrity of the composites was verified using the lead–bismuth eutectic alloy flushing experiment. The results of this research paper are important for future studies of oxygen control in the lead–bismuth eutectic alloy of lead-cooled fast reactors. View Full-Text
Keywords: Bi2O3; PbO; sintering temperature; mechanical properties; lead-bismuth eutectic alloy Bi2O3; PbO; sintering temperature; mechanical properties; lead-bismuth eutectic alloy
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MDPI and ACS Style

Ma, Y.; Yang, A.; Zhu, H.; Muhammad, A.; Yang, P.; Huang, B.; Niu, F. Effects of Bi2O3 Doping on the Mechanical Properties of PbO Ceramic Pellets Used in Lead-Cooled Fast Reactors. Materials 2019, 12, 1948. https://doi.org/10.3390/ma12121948

AMA Style

Ma Y, Yang A, Zhu H, Muhammad A, Yang P, Huang B, Niu F. Effects of Bi2O3 Doping on the Mechanical Properties of PbO Ceramic Pellets Used in Lead-Cooled Fast Reactors. Materials. 2019; 12(12):1948. https://doi.org/10.3390/ma12121948

Chicago/Turabian Style

Ma, Yan, Anxia Yang, Huiping Zhu, Arslan Muhammad, Pengwei Yang, Bokun Huang, and Fenglei Niu. 2019. "Effects of Bi2O3 Doping on the Mechanical Properties of PbO Ceramic Pellets Used in Lead-Cooled Fast Reactors" Materials 12, no. 12: 1948. https://doi.org/10.3390/ma12121948

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