Nuclear Techniques ›› 2014, Vol. 37 ›› Issue (05): 50202-050202.doi: 10.11889/j.0253-3219.2014.hjs.37.050202

• LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS • Previous Articles     Next Articles

Surface structure investigation of C/C composites by Ar ion irradiation

YANG Jingyi1 YAN Long1,2 HUAI Ping1,2   

  1. 1(Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China) 2(Key Laboratory of Nuclear Radiation and Nuclear Energy Technology, Chinese Academy of Sciences, Shanghai 201800, China)
  • Received:2014-03-26 Revised:2014-04-10 Online:2014-05-10 Published:2014-05-08

Abstract:

Background: C/C composites are an attractive choice for components in nuclear reactors because of their excellent performance in high temperature resistance, corrosion resistance and radiation resistance. However, to the best of our knowledge, the radiation research on their morphology and microstructure are scant. Purpose: The aim is to investigate the morphology and microstructure of C/C composites induced by irradiation. Methods: The C/C composites were irradiated with 0.5MeV and 1 MeV Ar ions at room temperature. The samples prepared before and after irradiation have been characterized by Raman spectroscopy and scanning electron microscope (SEM). Results: With the increment of irradiation dose, the surface defects in the irradiated samples greatly increase. Moreover, some cracks and holes are found in the matrix surfaces, and the largest ones are even up to the size of one micrometer. Conclusion: The surface defects in the matrix caused by 0.5 MeV Ar ion with dose of 2.4×1016 ions?cm?2 are much more than those by 1 MeV Ar ion with dose of 3×1016 ions?cm?2.

Key words: C/C composites, Ion irradiation, Surface structure