High temperature liquid metal corrosion and high temperature electrical conductivity of Y2O3
1997; Elsevier BV; Volume: 248; Linguagem: Inglês
10.1016/s0022-3115(97)00134-7
ISSN1873-4820
AutoresToshiaki Yoneoka, Takayuki Terai, Yoichi Takahashi,
Tópico(s)Fusion materials and technologies
ResumoYttrium sesquioxide has been proposed as a promising candidate material for collector electrodes used in the laser enrichment system of uranium-235. For this purpose, yttria is expected to be compatible with molten uranium and electrically conductive. A corrosion test of yttria with molten lanthanum as a simulating metal for uranium and a measurement of its electrical conductivity under extremely low oxygen pressure were performed. It was shown from the corrosion test that a yttria sample was considerably corroded by the molten lanthanum at 1513 K and the maximum corrosion depth for 5 Ms was 0.162 mm. The electrical conductivity of hypo-stoichiometric yttria reduced by titanium was higher than that of pure germanium at room temperature (2.1 S/m). The oxygen pressures equilibrated with the yttria specimens were estimated to discuss the relation to measured conductivities.
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