Corrosion characteristics of reduced activation ferritic-martensitic steel EUROFER by Li2TiO3 with excess Li

Lithium Vapor Chemistry of Hyper-Stoichiometric Lithium Metatitanate Li2.12(2)TiO3+y

“…33,34,37,38 This direct approach, however, resulted in large discrepancies for the same compounds. For example, our data of 23 Li,Li TiO a had a poor agreement with the data of Li2TiO3 by Nakagawa et al 33 Additionally, the Li activities in Li2O(s) using the data by Kimura et al 34 and Kudo et al 37 were obviously inconsistent. This is explained by significant influence of oxygen partial pressures in the measurements.…”

“…The measured partial pressures of LiO (g) (mass number: 23) from Li 2 TiO 3 was even higher than Li (g) in contradiction to the previous measurement for Li 2 TiO 3 , in which p Li is approximately 3 orders of magnitude higher than p LiO . 33 The high ion intensity of mass 23 may be caused by 23 Na impurity in the pebbles mixed during the pebble fabrication. By ICP-OES, the concentration of 23 Na impurity in the Li 2 TiO 3 pebbles was analyzed to be 630 ppm.…”

“…33 The high ion intensity of mass 23 may be caused by 23 Na impurity in the pebbles mixed during the pebble fabrication. By ICP-OES, the concentration of 23 Na impurity in the Li 2 TiO 3 pebbles was analyzed to be 630 ppm. Background ion counts of O 2 and D 2 measured while closing the movable shutter were higher than the other gas species, resulting in relatively large errors in p D 2 and p O 2 by error propagation.…”

“…20,21 The Li loss by evaporation should be minimized for sufficient breeding of tritium fuel during reactor operation. Additionally, the vaporization behavior affects chemical compatibility between ceramic breeder and reduced-activation ferritic/martensitic (RAFM) steels; the Li-containing gaseous species are corrosive and form a double oxide layer on surface of the RAFM steels, [22][23][24][25] in which the growth is controlled by oxygen diffusion in the layers. 23 The Li mass loss and corrosion were critically enhanced by the increases in moisture concentrations.…”

“…Additionally, the vaporization behavior affects chemical compatibility between ceramic breeder and reduced-activation ferritic/martensitic (RAFM) steels; the Li-containing gaseous species are corrosive and form a double oxide layer on surface of the RAFM steels, [22][23][24][25] in which the growth is controlled by oxygen diffusion in the layers. 23 The Li mass loss and corrosion were critically enhanced by the increases in moisture concentrations. 20,26 The corrosion of the RAFM structural steel by Li2.17TiO3+y was reported to be more severe than that by Li2TiO3, but less severe than that by Li2O.…”