期刊论文

Zou, Shuliang;Xiao, Weiwei

英文

OPTICS AND LASER TECHNOLOGY

0030-3992

2020

132

106493

10.1016/j.optlastec.2020.106493

Fig. 3 shows that the cross-sectional SEM images. From the image of original uncut sample, it is easy to find that the cross section is relatively smooth, the crystal presents irregular polygon shape, and the length of the polygons range from about 5 to 30 μm. Also, there are several micro-pores along the crystal boundary. The image of 1# sample shows that there is crispness phenomenon in the cutting section. Partial area of cutting section (as shown in the red wire frame in the picture) cracks

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This study is aimed to investigate the microstructure of UO2 pellet cut by fiber laser and subsequent nitric acid solubility. A high power laser cutting system was employed to cut fuel rod which consists of stainless steel cladding and UO2 pellets. The influences of assist gas and cutting speed on the micromorphology, element distribution and phase of the cut-off surface of UO2 pellet were discussed. And the nitric acid solubility of laser cut samples was also studied. The results showed that there are defects such as shrinkage micro-pore, fragment, cave and crack on the cut-off surface of UO2...