Corrosion Experiments of the Candidate Materials for Liquid Lithium Lead Blanket of Fusion Reactor
Authors: Huang Qun Ying , Gao Sheng , Zhu Zhi Qiang , Guo Zhi Hui , Ling Xin Zhen , Yan Zi Lin , Kondo Masatoshi , Tsisar Valentyn , Muroga Takeo , Wu Yi Can 
Published: October 2010

<span><span style="font-family: TimesNewRomanPSMT;">Liquid lithium lead (LiPb) eutectic is considered as one of the promising candidates of tritium breeder materials for fusion reactors. Series experiments on compatibility of LiPb with candidate <span style="font-family: TimesNewRomanPSMT;">structural materials such as CLAM steel and SiC </span><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;"><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;">f</span></span><span style="font-family: TimesNewRomanPSMT;">/SiC composites have been done in DRAGON</span></span><span style="font-family: TimesNewRomanPSMT;"> serious experimental devices in FDS team such as DRAGON-RTand stirred pot device in NIFS at <span style="font-family: TimesNewRomanPSMT;">500 </span><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;"><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;">o</span></span><span style="font-family: TimesNewRomanPSMT;">C and 600</span><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;"><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;">o</span></span><span style="font-family: TimesNewRomanPSMT;">C, respectively. The weight loss of CLAM specimens exposed in flowing LiPb with</span></span><span style="font-family: TimesNewRomanPSMT;"> the velocity of 0.17m/s increased with temperature, and the morphology and composition of the corroded surfaces were done by SEM observation and EDX analysis. The coating specimens <span style="font-family: TimesNewRomanPSMT;">including Al </span><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;"><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;">2</span></span><span style="font-family: TimesNewRomanPSMT;">O</span><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;"><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;">3 </span></span><span style="font-family: TimesNewRomanPSMT;">and FeAl/Al</span><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;"><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;">2</span></span><span style="font-family: TimesNewRomanPSMT;">O</span><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;"><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;">3 </span></span><span style="font-family: TimesNewRomanPSMT;">coatings prepared on the CLAM specimens were also exposed in the</span></span><span style="font-family: TimesNewRomanPSMT;"> DRAGON-RT device, the results revealed that there was no obvious thinning observed on the outer <span style="font-family: TimesNewRomanPSMT;">surface of the protective coating. Preliminary analysis of SiC </span><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;"><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;">f</span></span><span style="font-family: TimesNewRomanPSMT;">/SiC composites specimens indicated</span></span><span style="font-family: TimesNewRomanPSMT;"><span style="font-family: TimesNewRomanPSMT;"> that the mullite coating with plasma spray method on the SiC </span><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;"><span style="font-family: TimesNewRomanPSMT; font-size: xx-small;">f</span></span><span style="font-family: TimesNewRomanPSMT;">/SiC composites specimen corroded in</span></span><span style="font-family: TimesNewRomanPSMT;"> the high temperature LiPb, but no obvious corrosion attack was observed on the specimen surface, while the matrix and fiber of reaction-sintered composites showed slightly corrosion attack after exposure in static LiPb at 800°C for 200 hrs. Further corrosion experiment will be carried out in the near future. </span>