Hydrogen retention behavior of beryllides as advanced neutron multipliers

Nuclear Materials and Energy

M. Miyamoto¹  Y. Fujii¹  H. Iwakiri²  N. Murayoshi³  Jae-Hwan Kim⁴  M. Nakamichi⁴ 

[1] Department of Material Science, Shimane University, 1060, Nishikawatu, Matsue 690-8504, Japan;Faculty and Graduate School of Education, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan;Graduate school of energy science, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan;Sector of Fusion Research and Development, Japan Atomic Energy Agency, 2-166 Obuchi, Omotedate, Rokkasho, Aomori 039-3212, Japan;

关键词: Thermal desorption spectroscopy;    Transmission electron microscopy;    Hydrogen;    Be12Ti;    Microstructure;   

DOI  :  10.1016/j.nme.2016.03.001

来源: DOAJ

【 摘 要 】

Beryllium intermetallic compounds (beryllides) are the most promising candidate materials for use as advanced neutron multipliers in future fusion reactors because of their low swelling and high stability at high temperatures. Recently, beryllium–titanium beryllide pebbles such as Be12Ti have been successfully fabricated using a novel granulation process. In this study, the fundamental aspects of the behavior of hydrogen isotopes in Be12Ti pebbles were investigated via thermal desorption spectroscopy and transmission electron microscopy. In addition, atomistic calculations using first principles electronic-structure methods were applied to determine the solution energy of hydrogen in Be12Ti. The results showed simpler and weaker hydrogen-trapping efficiency for Be12Ti than for pure Be.

【 授权许可】

Unknown