Comparison of High-Energy He+ and D+ Irradiation Impact on Tungsten Surface in the IR-IECF Device

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• 作者：S. Semsari (1)
  A. Zakeri (1)
  A. Sadighzadeh (2)
  S. Khademzadeh (2)
  M. Sedaghat (2)
  M. Torabi (2)
  V. Damideh (2)
  
• 关键词：IECF ; Tungsten ; Fusion first wall material ; SEM
• 刊名：Journal of Fusion Energy
• 出版年：2013
• 出版时间：February 2013
• 年：2013
• 卷：32
• 期：1
• 页码：142-149
• 全文大小：1063KB
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• 作者单位：S. Semsari (1)
  A. Zakeri (1)
  A. Sadighzadeh (2)
  S. Khademzadeh (2)
  M. Sedaghat (2)
  M. Torabi (2)
  V. Damideh (2)
  
  1. School of Metallurgy and Materials Engineering, Iran University of Science and Technology, 1684613114, Tehran, Iran
  2. Plasma Physics and Nuclear Fusion Research School, Nuclear Science and Technology Research Institute, AEOI, PO Box 14155-1339, Tehran, Iran
  
• ISSN：1572-9591

文摘

Polycrystalline tungsten specimens were irradiated in the Iranian Inertial Electrostatic Confinement Fusion device (IR-IECF) by high energy (~100?keV) and high fluency (~1019 ions/cm2) helium and deuterium plasma to investigate the implantation impact of high energetic ions on tungsten as a candidate for fusion first wall material. Comparison of the exposure by He and D2 plasma and influence of high temperature (~1,100?°C) implantation of each ion has been examined. Scanning electron microscopy was used to investigate surface morphology changes for various ion fluencies. Results showed the onset of visible surface pores formation especially for helium implanted samples which increased with higher implant fluencies, eventually resulting in a rough and flaky surface structure, unlike deuterium implanted samples on which smoothening of the surface occurred. Microhardness measurements were used to evaluate mechanical properties of implanted tungsten. Each specimen sustained surface hardening after implantation which was observed to increase with greater ion dose. The phase formation and structural evolution were studied by X-ray diffractometry method.