MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Micron-Bubble Formation on Polycrystal Tungsten due to Low-Energy and High-Flux Helium Plasma Exposure
Dai NishijimaMitsutaka MiyamotoHirotomo IwakiriMinyou YeNoriyasu OhnoKazutoshi TokunagaNaoki YoshidaShuichi Takamura
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2005 Volume 46 Issue 3 Pages 561-564

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Abstract

Surface modification of polycrystal tungsten due to low-energy and high-flux helium plasma exposure was investigated. Micron-sized holes and bubbles were formed on the surface at a surface temperature of 2200 K even when the incident ion energy of helium was 10 eV. Hole formation was significantly reduced on the surface when the incident ion energy of helium was around 5 eV and no surface modification was seen at less than 5 eV. Coalescence of micron-sized helium bubbles was observed in the cross section of a W sample.

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© 2005 The Japan Institute of Metals and Materials
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