A study of the suppression of the high-temperature helium embrittlement in an oxide-particle dispersion strengthened alloy

作者：Zhang ChongHong^*; Jang J S; Yang YiTao; Song Yin; Sun YouMei; Cho H D; Jin YunFan

来源：Chinese Science Bulletin, 2008, 53(21): 3416-3421.

DOI：10.1007/s11434-008-0446-7

• ODS alloys
• high-energy ions
• irradiation
• helium embrittlement
• helium bubbles

In this paper, an investigation on the micro-structure of an Fe-base oxide-dispersion-strengthened (ODS) alloy irradiated with high-energy (20)Ne ions to different doses at a temperature around 0.5T(m) (T(m) is the melting point of the alloy) is presented. Investigation with the transmission electron microscopy found that the accelerated growth of voids at grain-boundaries, which is usually a concern in conventional Fe-base alloys under conditions of inert-gas implantation, was not observed in the ODS alloy irradiated even to the highest dose (12000 at.ppm Ne). The reason is ascribed to the enhanced recombination of point defects and strong trapping of Ne atoms at the interfaces of the nano-scale oxide particles in grains. The study showed that ODS alloys have good resistance to the high-temperature inter-granular embrittlement due to inert-gas accumulation, exhibiting prominence of application in harsh situations of considerable helium production at elevated temperatures like in a fusion reactor.

• 出版日期2008-11
• 单位中国科学院近代物理研究所