Formation of intermetallic compound at interface between rare earth elements and ferritic-martensitic steel by fuel cladding chemical interaction  

作　　者：Jun Hwan Kim Byoung Oon Lee Chan Bock Lee Seung Hyun Jee Young Soo Yoon 

机构地区：[1]Advanced Fuel Development Division,Korea Atomic Energy Research Institute,P.O.Box 105,Yuseong,Daejeon,305-600,Republic of Korea [2]Department of Mate-rials Science and Engineering,Yonsei University,134 Sinchon Dong,Seoul,120-749,Republic of Korea

出　　处：《Journal of Rare Earths》2012年第6期599-603,共5页稀土学报（英文版）

基　　金：Project supported by National Nuclear Technology Program of National Research Foundation (NRF);Ministry of Education, Science and Technology (MEST), Korean Government

摘　　要：The intermetallic compounds formation at interface between rare earth elements and clad material were investigated to demonstrate the effects of rare earth elements on fuel-cladding chemical interaction （FCCI） behavior. Mischmetal （70Ce-30La） and Nd were prepared as rare earth elements. Diffusion couple testing was performed on the rare earth elements and cladding （9Cr2W steel） near the operation temperature of （sodium-cooled fast reactor） SFR fuel. The performance of a diffusion barrier consisting of Zr and V metallic foil against the rare earth elements was also evaluated. Our results showed that Ce and Nd in the rare earth elements and Fe in the clad material interdiffused and reacted to form intermetallic species according to the parabolic rate law, describing the migration of the rare earth element. The diffusion of Fe limited the reaction progress such that the entire process was governed by the cubic rate law. Rare earth materials could be used as a surrogate for high burnup metallic fuels, and the performance of the barrier material was demonstrated to be effective.The intermetallic compounds formation at interface between rare earth elements and clad material were investigated to demonstrate the effects of rare earth elements on fuel-cladding chemical interaction （FCCI） behavior. Mischmetal （70Ce-30La） and Nd were prepared as rare earth elements. Diffusion couple testing was performed on the rare earth elements and cladding （9Cr2W steel） near the operation temperature of （sodium-cooled fast reactor） SFR fuel. The performance of a diffusion barrier consisting of Zr and V metallic foil against the rare earth elements was also evaluated. Our results showed that Ce and Nd in the rare earth elements and Fe in the clad material interdiffused and reacted to form intermetallic species according to the parabolic rate law, describing the migration of the rare earth element. The diffusion of Fe limited the reaction progress such that the entire process was governed by the cubic rate law. Rare earth materials could be used as a surrogate for high burnup metallic fuels, and the performance of the barrier material was demonstrated to be effective.

关 键 词：intermetallic compound sodium-cooled fast reactor （SFR） metallic fuel fuel-cladding chemical interaction （FCCI） rare earths BARRIER 

分 类 号：TG174.44[金属学及工艺—金属表面处理]