Characteristics of U_3Si and U_3Si_2 Powders Prepared by Centrifugal Atomization

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The characteristics, that is, morphology, size distribution, alloy phase and microstructure of U<SUB>3</SUB>Si and U<SUB>3</SUB>Si<SUB>2</SUB> powders, solidified rapidly by a centrifugal atomization, were investigated. The atomized powders consist of spherical particles with a relatively narrow size distribution independent of the alloy composition. The particle size distribution can be controlled by adjusting the atomization parameters such as feeding rates of the melt and revolution speeds of the disk. The major phases of atomized U<SUB>3</SUB>Si and U<SUB>3</SUB>Si<SUB>2</SUB> powders are α-U and U<SUB>3</SUB>Si<SUB>2</SUB> and U<SUB>3</SUB>Si<SUB>2</SUB>, respectively. The atomized U<SUB>3</SUB>Si powder has a dendritic structure of very fine and non-faceted U<SUB>3</SUB>Si<SUB>2</SUB> precipitates with less fibric and eutectic U<SUB>3</SUB>Si<SUB>2</SUB> structure. The microstructure of U<SUB>3</SUB>Si<SUB>2</SUB> powder shows a cellular structure with fine U<SUB>3</SUB>Si<SUB>2</SUB> grains and finely dispersed silicon-rich precipitates. The time for complete peritectoid reaction of the atomized U<SUB>3</SUB>Si particles and the resulting grain size are greatly reduced, due to the refinement of primary U<SUB>3</SUB>Si<SUB>2</SUB> precipitates.

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  • Journal of nuclear science and technology  

    Journal of nuclear science and technology 34(12), 1127-1132, 1997-12-25 

    Atomic Energy Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002078518
  • NII書誌ID(NCID)
    AA00703720
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00223131
  • NDL 記事登録ID
    4371576
  • NDL 雑誌分類
    ZM35(科学技術--物理学)
  • NDL 請求記号
    Z53-A460
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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