Amorphous and nanocrystalline glass-coated articles

B - Operations – Transporting – 32 – B

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B32B 15/02 (2006.01)

Patent

CA 2531356

A drawn glass-coated metallic member has a thermal contraction coefficient differential such that the thermal contraction coefficient of the glass is less than that of the metallic member. The thermal contraction coefficient differential is maintained within a predetermined range during drawing. The glass is placed under residual compression, interfacial bonding between said glass and said wire is substantially uniform, and surface cracking and bond breaks between metal and glass are substantially prevented. A dynamic balance is maintained between the surface tension of the molten alloy and the resistance to high temperature deformation by the glass vessel in which it is contained, enabling the production of glass-coated amorphous or nanocrystalline alloy members having predefined cross-sectional shapes.

L'invention porte sur un élément métallique revêtu de verre étiré, présentant un différentiel de coefficient de contraction thermique tel que le coefficient de contraction thermique du verre est inférieur à celui de l'élément métallique. Le différentiel de coefficient de contraction thermique est maintenu dans une marge prédéterminée au cours de l'étirage. Le verre est soumis à une compression résiduelle, la liaison interfaciale entre le verre et le câble est sensiblement uniforme, et les fissures de surface et les ruptures de liaison entre le métal et le verre sont sensiblement évitées. Un équilibre dynamique est maintenu entre le tension de surface de l'alliage en fusion et la résistance à une déformation à température élevée par le récipient en verre dans lequel il est contenu, ce qui permet la production d'éléments d'alliage amorphes ou monocristallins revêtus de verre et présentant des formes transectionnelles prédéfinies.

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