Characterization of the Tracer YSZ/CoO Microspheres with YSZ Ceramic Coating for HTR Fuel Element

Zi Qiang Li; Jing Tao Ma; Xiao Xue Liu; Bing Liu

doi:10.4028/www.scientific.net/KEM.697.822

Paper Titles

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 697Characterization of the Tracer YSZ/CoO...

Characterization of the Tracer YSZ/CoO Microspheres with YSZ Ceramic Coating for HTR Fuel Element

Abstract:

The Co element was used during the first operation of high temperature reactor (HTR) reactor to distinguish low-enrichment and high-enrichment fuel elements. In this paper the YSZ/CoO ceramic tracer microspheres with YSZ coating were prepared. The design size of the microspheres were about 750μm. The YSZ shell thickness were 100 μm, the mean nuclear roundness were ≤1.03 and the density were ≥5.50g/cm³. Morphology, microstructure and element composition of the core-shell microspheres were characterized by stereo microscope, scanning electron microscopy, x-ray spectrometers etc. The results of both line scan and spot scan of X-ray spectrometer show that dense YSZ shell can efficiently prevent Co element in YSZ/CoO core from diffusing into the YSZ shell at high temperature.

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Periodical:

Key Engineering Materials (Volume 697)

Pages:

822-825

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.697.822

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Online since:

July 2016

Authors:

Zi Qiang Li, Jing Tao Ma*, Xiao Xue Liu, Bing Liu

Keywords:

CoO, Fuel Element, High Temperature Reactor, Rolling Forming, Tracer Spheres, YSZ

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