Superconductor prodn. by chemical vapour phase deposition on fibre - by exposing niobium or tantalum to nucleating gas and nucleating agent to give uniform film

Superconductor prodn. involves deposition of a uniform Ta and/or Nb (cpd) film on a fibrous support by chemical vapour phase reaction. The fibres with Ta/Nb are exposed to N2 gas or a gaseous N cpd. and a H halide, so that the H halide reacts with Ta/Nb to form a gaseous cpd. which then reacts with...

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Bibliographische Detailangaben
1. Verfasser:	ERIC LANGLEY BUSH ET ERNEST JAMES WORKMAN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BASIC ELECTRIC ELEMENTS CAPACITORS CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE CASTING CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTRICITY INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METALLURGY PERFORMING OPERATIONS POWDER METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	Superconductor prodn. involves deposition of a uniform Ta and/or Nb (cpd) film on a fibrous support by chemical vapour phase reaction. The fibres with Ta/Nb are exposed to N2 gas or a gaseous N cpd. and a H halide, so that the H halide reacts with Ta/Nb to form a gaseous cpd. which then reacts with the N2 or N cpd., so that a uniform film is formed on the surface of the fibres by an irreversible reaction. The uniform nucleation over the entire surface, required for the prodn of a uniform coating is obtd by using this irreversible process. PROCEDE POUR LA DEPOSITION D'UNE COUCHE METALLIQUE SUR UN SUBSTRAT PULVERULENT. CE PROCEDE PERMET LA DEPOSITION PAR VOIE CHIMIQUE EN PHASE VAPEUR D'UNE COUCHE PRATIQUEMENT UNIFORME DE METAL ANODISABLE SUR UN SUBSTRAT DE MATERIAU ISOLANT PULVERULENT, TEL QUE L'ALUMINE.LES PARTICULES DU SUBSTRAT SONT EXPOSEES A UN COMPOSE GAZEUX D'AZOTE (OU A DE L'AZOTE PUR) EN MEME TEMPS QU'A DE L'HYDROGENE ET A UN HALOGENURE DU METAL ANODISABLE. L'EPAISSEUR DU REVETEMENT OBTENU PEUT ETRE INFERIEUR A 0,3 MICRON.L'INVENTION TROUVE SON APPLICATION DANS LA FABRICATION DES ANODES DE CONDENSATEURS ELECTROLYTIQUES.