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|Abstract:||Lithium conditioned plasma facing surfaces have lowered recycling and enhanced plasma performance on many fusion devices and liquid lithium plasma facing components are under consideration for future machines. A key factor in the performance of liquid lithium components is the wetting by lithium of its container. We have observed the surface spreading of lithium from a mm-scale particle to adjacent stainless steel surfaces using a scanning Auger microprobe that has elemental discrimination. The spreading of lithium occurred at room temperature (when lithium is a solid) from one location at a speed of 0.62 mu m/day under ultrahigh vacuum conditions. Separate experiments using temperature programmed desorption (TPD) investigated bonding energetics between monolayer-scale films of lithium and stainless steel. While multilayer lithium desorption from stainless steel begins to occur just above 500 K (E-des = 1.54 eV), sub-monolayer Li desorption occurred in a TPD peak at 942 K (E-des = 2.52 eV) indicating more energetically favorable lithium-stainless steel bonding (in the absence of an oxidation layer) than lithium lithium bonding. (C) 2015 Elsevier B.V. All rights reserved.|
|Electronic Publication Date:||2016|
|Citation:||Skinner, CH, Capece, AM, Roszell, JP, Koel, BE. (2016). Spreading of lithium on a stainless steel surface at room temperature. JOURNAL OF NUCLEAR MATERIALS, 468 (26 - 30). doi:10.1016/j.jnucmat.2015.10.059|
|Pages:||26 - 30|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||JOURNAL OF NUCLEAR MATERIALS|
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