1. Effect of O2 on copper-water vapor interaction near critical point.
- Author
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Jin, Y., Kato, H., Korablova, I. R., Ioku, K., and Yamasaki, N.
- Subjects
CRITICAL point (Thermodynamics) ,IRON & steel plates ,PROPERTIES of matter ,CERAMICS ,CRYSTALLIZATION ,GRANITE ,X-ray diffraction ,SCANNING electron microscopy - Abstract
A significant weight loss of copper plate was observed after copper-water vapor interaction near critical point. This leads to the acceleration of the ceramic layer formation on SUS surface during granite-water vapor interaction in the presence of copper. In this paper, we have determined the chemical state of copper at which the mass transfer takes place through reaction with H
2 and O2 +N2 gas mixture at the different O2 amount. Obtained results indicate that the weight loss of copper plate occurs at Cu2 O (+1) state due to a complex processes. The morphology of copper species on the surface of mesh and granite suggests that the Cu2 O was dissolved in water vapor and recrystallized on the surface of mesh and granite. Copper species were characterized by X-ray diffraction(XRD), scanning electron microscopy (SEM) equipped with an energy dispersive X-ray (EDX). [ABSTRACT FROM AUTHOR]- Published
- 2006
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