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Behavior of Vanadium Alloys in Calcium-Containing Lithium

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Abstract

Using the method of Auger spectroscopy, we have studied the interaction of calcium-containing lithium with vanadium alloys (V-20Ti and V-15.8Ti-9.5Cr-0.03Y) at a temperature of 700°C and holding up to 1500 h. We have established the kinetics of penetration of the liquid metal into the solid one and revealed the structural nonuniformity of propagation of the corrosion front. There exists a certain latency time during which lithium does not penetrate into vanadium alloys. In this period, a protective layer based on CaO is formed on the surface of the alloys, disperse particles of Ti x O y are dissolved in the under-oxide layer, and α′-phase is precipitated. After that, lithium penetrates into the alloy through the grains (up to 150–200 μm in depth) and, later, along their boundaries. Modification of the vanadium-titanium matrix by yttrium hampers lithium penetration. Degradation of the CaO layer is attributable to a decrease in the calcium concentration in the melt.

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  1. Karpenko Physicomechanical Institute, Ukrainian Academy of Sciences, Lviv

    O. I. Eliseeva

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  1. O. I. Eliseeva
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Eliseeva, O.I. Behavior of Vanadium Alloys in Calcium-Containing Lithium. Materials Science 37, 910–917 (2001). https://doi.org/10.1023/A:1015645208150

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