[3F12-14] Ceramics

[3F12] Effect of high temperature ion irradiation on swelling and microstructure of Liquid Phase Sintering SiC

*Yansong Zhong¹, Baopu Wang¹, Yina Du¹, Kanjiro Kawasaki¹, Fujio Shinoda¹, Yasunori Hayashi¹, Tatsuya Hinoki¹ (1. Kyoto Univ.)

Keywords:SiC, ion irradiation, void swelling, mircro structure

In fusion and fission reactors, SiC_f/SiC composites are attractive structure materials for their excellent properties in irradiation environments. For different reactors, the temperatures that structure materials suffer are diverse. With the increase of temperature, the mechanism of irradiation swelling will go through three stages, amorphization, point defect and void swelling. In previous research, the two stage swelling of LPS SiC at low temperature has been measured. According to previous research, it could be assumed that the swelling at high temperature may be extremely low. However, the irradiation behavior of sintering additives may influence total swelling. The objective of this research is to confirm this hypothesis and analysis the microstructure evolution. In this research, CVD SiC, LPS SiC and LPS SiC-20vol%BN were irradiated at 1200ºC with the doses of 0.1, 1, 3, 10 dpa. Irradiation induced swelling was observed by AFM (Atom Force Microscope). Microstructure was observed and analyzed with SEM. The results were compared with the data of low temperature.