Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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PARTICLE SIZE-DEPENDENT PULVERIZATION OF B4C AND GENERATION OF B4C/STS NANOPARTICLES USED FOR NEUTRON ABSORBING COMPOSITES

  • Kim, Jaewoo (Nuclear Materials Research Division) ;
  • Jun, Jiheon (Department of Materials Science and Engineering, The Ohio State University) ;
  • Lee, Min-Ku (Nuclear Materials Research Division)
  • Received : 2014.02.17
  • Accepted : 2014.06.02
  • Published : 2014.10.25
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Abstract

Pulverization of two different sized micro-$B_4C$ particles (${\sim}10{\mu}m$ and ${\sim}150{\mu}m$) was investigated using a STS based high energy ball milling system. Shapes, generation of the impurities, and reduction of the particle size dependent on milling time and initial particle size were investigated using various analytic tools including SEM-EDX, XRD, and ICP-MS. Most of impurity was produced during the early stage of milling, and impurity content became independent on the milling time after the saturation. The degree of particle size reduction was also dependent on the initial $B_4C$ size. It was found that the STS nanoparticles produced from milling is strongly bounded with the $B_4C$ particles forming the $B_4C$/STS composite particles that can be used as a neutron absorbing nanocomposite. Based on the morphological evolution of the milled particles, a schematic pulverization model for the $B_4C$ particles was constructed.

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References

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