3-3 A Study on Irradiation Damage of T91 and SIMP Steels under Self-Ion Irradiation by Slo

·92·IMP &HIRFL Annual Report

2015

Fig.4(color online)Hardness versus maximum pene-tration

depth curves for

unimplanted 4H-SiC,and He

ion implanted 4H-SiC at di?erent ?uences from 0.04

to 0.8

dpa (1

.0×1015to 2.0×1016cm ?2).Fig.5(color online)

Hardness versus maximum penetra-tion depth curves for unimplanted 4H-SiC,and Si ion implanted 4H-SiC at di?erent ?uences from 0.04to 4dpa (1.0×1015to 2.0×1017cm ?2).

References

[1] E.Wendler,A Heft,W.Wesch,Nucl.Instr.and Meth.B,141(1998)105.

[2]Sandrine Mrio,Jean-Marc Costantini.Philosohpical Magazine,(2014).

3-3A Study on Irradiation Damage of T91and SIMP Steels under

Self-Ion Irradiation by Slow-positron Annihilation Spectroscopy

Fang Xuesong,Shen Tielong,Wang Zhiguang,Wei Kongfang,Gao Xing,Gao Ning,

Sun Jianrong,Li Bingsheng,Zhu Yabin,Pang Lilong,Cui Minghuan,Chang Hailong,

Wang Dong,He Wenhao,Han Yi,Zhao Sixiang,Tai Pengfei,Liu Chao and Ma Zhiwei

Due to its good physical properties such as low coe?cient,high thermal conductivity,high resistance of irradia-tion swelling,and good geometric stability,the F/M steel T91and SIMP are two kinds of accepted material used in nuclear reactor.So it’s necessary for us to make some research on them.

In this paper,self-ion irradiation was used to simulate the damage caused by fast neutrons in the F/M steel T91and SIMP under temperature of 300?C.The irradiation experiment on T91and SIMP steel samples were carried out with 352.8keV Fe-ions.

In the control experiment,the samples were irradiated to 0.09and 0.24dpa for these two kinds of material.Fig.1The S -parameter versus positron incident energy,

SIMP steels.Fig.2The S -parameter versus positron incident energy,T91steels.

In order to characterize the samples,Slow-positron annihilation spectroscopy analysis was carried out at School of Physical Sciences,USTC.

Figs.1and 2show that the defects in blank samples are lower than the ones after irradiation.The reason for this phenomenon is the technology used during preparation.Grinding and polishing caused these defects on the surface