Thermal stability of the Cr-coated zirconium alloy microstructure prepared by pulsed laser deposition  

作　　者：Bo Li Hui-Long Yang Reuben Holmes Li-Juan Cui Sho Kano Hiroaki Abe 

机构地区：[1]Department of Nuclear Engineering and Management,The University of Tokyo,Tokyo 113-8656,Japan [2]School of Nuclear Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [3]Nuclear Professional School,The University of Tokyo,Ibaraki 319-1188,Japan

出　　处：《Tungsten》2024年第2期333-341,共9页钨科技（英文）

基　　金：supported by the Ministry of Education,Culture,Sport,Science and Technology of Japan(MEXT)Innovative Nuclear Research and Development Program(Grant No.JPMXD0220354500);Japan Atomic Energy Agency(JAEA)Nuclear Energy S&T and Human Resource Development Project through Concentrating Wisdom(Grant No.JPJA20P20337528);the Collaborative Research Project at the Nuclear Professional School,School of Engineering,the University of Tokyo;the continuous support from the China Scholarship Council(CSC)。

摘　　要：Cr-coated zirconium alloy was prepared by pulsed laser deposition(PLD)for the application of accident-tolerant fuel cladding in light water reactors.The microstructural characteristics of the Cr coating and its evolution with temperature were investigated using grazing incidence X-ray diff raction and in situ heating transmission electron microscopy(TEM).Results show that the microstructure of the laser-deposited Cr coatings consists mainly of fine and non-specific shaped nano-crystals in the inner layer and columnar crystals in the outer layer.The recrystallization of the Cr-coating layer starts at 300–400℃ to release the high strain introduced by PLD,and the grain coalescence starts at temperatures>400°C.Upon annealing,the(110)-texture gradually intensifi es because of its high reticular density and low close-packed energy.Additionally,in situ heating TEM observation shows the presence of cavities on the Cr–Zr interface,which may result from the interdiff usion and/or the transformation from amorphous to crystalline.

关 键 词：Accident tolerant fuel Crcoating Interface MICROSTRUCTURE Pulsed laser deposition 

分 类 号：TG665[金属学及工艺—金属切削加工及机床] TG174.4