Chemical and structural durability of α-Al2O3 and γ-LiAlO2 layers formed on ODS FeCrAl alloys in liquid lithium lead stirred flow
Masatoshi Kondo, Susumu Hatakeyama, Naoko Oono, Yoshiki Kitamura, Kan Sakamoto, Teruya Tanaka, Yoshimitsu Hishinuma
Abstract
The protection performance of an α-Al 2 O 3 layer formed on oxide dispersion-strengthened (ODS) FeCrAl alloys in liquid LiPb flow was investigated by means of the corrosion tests under stirred-flow condition at 873 K for 1000 h. The result of STEM/EELS analysis indicated the Li adsorption and diffusion into α-Al 2 O 3 layer. The ODS FeCrAl alloys in-situ formed a durable γ-LiAlO 2 layer on their bare surface in liquid LiPb. The results of micro scratch tests on the protective layers indicated that they revealed strong resistance against the exfoliation in a shearing direction after the immersion to liquid LiPb.
Topics & Concepts
DurabilityLithium (medication)Materials scienceCorrosionMetallurgyLead (geology)Flow (mathematics)Composite materialMechanicsGeomorphologyGeologyPhysicsEndocrinologyMedicineNuclear Materials and PropertiesFusion materials and technologiesHigh-Temperature Coating Behaviors