High pressure oxidation of precursor alloys

Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – Process of making wire – tape – cable – coil – or fiber

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148292, 148316, 148432, 148DIG35, 429930, 505 78, 505736, 505714, 505500, 505124, 505482, H01B 1700, H01B 108

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054725275

ABSTRACT:
A method for forming unsegregated metal oxide-silver composites includes preparing a precursor alloy comprising silver and precursor elements of a desired metal oxide and oxidizing the alloy under conditions of high oxygen activity selected to permit diffusion of oxygen into silver while significantly restricting the diffusion of the precursor elements into silver, such that oxidation of the precursor elements to the metal oxide occurs before diffusion of the metallic elements into silver. Further processing of the metal oxide composite affords an oxide superconducting composite with a highly unsegregated microstructure.

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Stochel et al. "The Internal Oxidation of Silver Alloys at High Pressure and in Atomic Oxygen", Apr. 1965 pp. 286-295.
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"High-Pressure Oxidation of Refractory Metals--Experimental Methods and Interpretation" W. M. Fassel, Jr. et al., 2 Metalkde, 64(4) 286-295 (1973) no month.
"The Internal Oxidation of Silver Alloys at High Pressures and in Atomic Oxygen" D. Stockel et al. AFSC Oxidation of Tungsten and other Refractory Metals, ML-TR-64-162 (Apr. 1965).
"Etude Diffractometrique de la Dissolution de L'Oxygene dans le Niobium a Pression Moyenne (75 Torr) et Entre 300 et 400.degree. C" C. Perrin et al., Journal of the Less-Common Metals 77, 49-59 (1981) no month.

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