Erosion of Pyrolytic Graphite and Ti-doped Graphite due to High Flux Irradiation

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<BR>The erosion of pyrolytic graphite and titanium doped graphite RG-Ti above 1, 780K was investigated by 5keV Ar beam irradiation with the flux from 4×1019 to 1×1021m-2•s-1. The total erosion yields were significantly reduced with the flux. This reduction would be attributed to the reduction of RES (radiation enhanced sublimation) yield, which was observed in the case of isotropic graphite with the flux dependence of RES yield of φ-0.26 (φ: flux) obtained in our previous work. The yield of pyrolytic graphite was roughly 30% higher than that of isotropic graphite below the flux of 1020m-2•-1 whereas each yield approached to very close value at the highest flux of 1×1021m-2•s-1. This result indicated that the effect of graphite structure on the RES yield, which was apparent in the low flux region, would disappear in the high flux region probably due to the disordering of crystal structure. In the case of irradiation to RG-Ti at 1, 780K, the surface undulations evolved with a mean height of about 3μm at 1.2×1020m-2•s-1, while at higher flux of 8.0×1020m-2•s-1 they were unrecognizable. These phenomena can be explained by the reduction of RES of graphite parts excluding TiC grains.

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  • Journal of nuclear science and technology  

    Journal of nuclear science and technology 34(8), 792-798, 1997-08-25 

    Atomic Energy Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002077748
  • 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
    4277725
  • 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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