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Sohn, Dong-Seong
Innovative Nuclear FUEL(INFUEL)
Research Interests
  • Nuclear fuel design
  • Nuclear fuel
  • Nuclear system
  • Performance analysis

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Effect of Ball-mill Treatment on Power Characteristics, Compaction and Sintering Behaviors of ex-AUC and ex-ADU UO₂Powder

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Title
Effect of Ball-mill Treatment on Power Characteristics, Compaction and Sintering Behaviors of ex-AUC and ex-ADU UO₂Powder
Author
Na, Sang-HoKim, Si-HyungLee, Young-WooSohn, Dong-Seong
Issue Date
2002
Publisher
한국원자력학회
Citation
Journal of the Korean Nuclear Society, v.34, no.1, pp.60 - 67
Abstract
The effects of ball-milling time(0 ~4 hrs) have been investigated on the change of powder characteristics, compaction behavior (compaction pressure range : 200 ~400MPa) and sinterability (1700'c in Ha atmosphere) of two different UOtex:\small\textstyle$_2$ powders (ex-ADU and ex-AUC) prepared by the wet process. It is observed that, while the ex-ADU UOtex:\small\textstyle$_2$ was little affected, the ex-AUC UOtex:\small\textstyle$_2$ was largely affected by the ball-milling treatment. This may be attributed to the characteristics of particle size formed during the preparation step, i.e.., the former has a small average size of about 1.0tex:\small\textstyle${\mu}{\textrm}{m}$, while the latter has a relatively large average size of about 301n. It appeared that the effective size reduction by ball-milling treatment is limited to the particle size larger than ltex:\small\textstyle${\mu}{\textrm}{m}$, and to the extent of maximum decrease in size of about 0.5tn. In the case of ex-AUC UOtex:\small\textstyle$_2$, it is observed that the particle size decreased with ball-milling time and green density and sintered density of the pellets prepared from ball-milled powder increased compared with those of pellets prepared from the as-received powder under the same conditions. This may be attributed mainly to the fine particles formed during the ball-milling treatment.
URI
https://scholarworks.unist.ac.kr/handle/201301/6168
ISSN
0372-7327
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