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GB418284A - Method of precipitating zirconium and/or hafnium on a core consisting of a highly refractory material - Google Patents

Method of precipitating zirconium and/or hafnium on a core consisting of a highly refractory material

Info

Publication number
GB418284A
GB418284A GB155633A GB155633A GB418284A GB 418284 A GB418284 A GB 418284A GB 155633 A GB155633 A GB 155633A GB 155633 A GB155633 A GB 155633A GB 418284 A GB418284 A GB 418284A
Authority
GB
United Kingdom
Prior art keywords
zirconium
hafnium
thread
heated
atmosphere
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB155633A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Priority to GB155633A priority Critical patent/GB418284A/en
Publication of GB418284A publication Critical patent/GB418284A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/06—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material
    • C23C16/08—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material from metal halides
    • C23C16/12—Deposition of aluminium only
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

A core of highly refractory material is heated in an atmosphere consisting of a reducing gas and a volatile compound or compounds, e.g. the chlorides or bromides, of zirconium or hafnium or a mixture of compounds of zirconium and hafnium. A coating of metal compound is obtained on the core, which is then reduced to metal by heating for some time in a suitable atmosphere. The material of the core is preferably zirconium, hafnium, alloys or compounds of these metals, carbon, or a material consisting partly of carbon. A carbon thread may be metallized by suspending it between lead-in wires in a vessel into which solid zirconium chloride is introduced. The thread is then heated electrically to 1800 DEG C. and hydrogen is introduced into the vessel, which is placed in a furnace to heat it to above 200 DEG C. to vaporize the zirconium chloride. The chloride decomposes on the heated thread giving a deposit of zirconium hydride with or without some metallic zirconium. The coated thread is then heated in a vacuum for several hours at 1900 DEG C. to convert the hydride into metal. This heating may alternatively be carried out in an atmosphere of a rare gas or in any inert atmosphere not containing a large amount of hydrogen. Ductile bodies coated with zirconium or hafnium which can be worked by rolling or drawing to form rods, wires or bands can be made by the process and the coated wires may be used in electric discharge tubes.
GB155633A 1933-01-17 1933-01-17 Method of precipitating zirconium and/or hafnium on a core consisting of a highly refractory material Expired GB418284A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB155633A GB418284A (en) 1933-01-17 1933-01-17 Method of precipitating zirconium and/or hafnium on a core consisting of a highly refractory material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB155633A GB418284A (en) 1933-01-17 1933-01-17 Method of precipitating zirconium and/or hafnium on a core consisting of a highly refractory material

Publications (1)

Publication Number Publication Date
GB418284A true GB418284A (en) 1934-10-08

Family

ID=9724019

Family Applications (1)

Application Number Title Priority Date Filing Date
GB155633A Expired GB418284A (en) 1933-01-17 1933-01-17 Method of precipitating zirconium and/or hafnium on a core consisting of a highly refractory material

Country Status (1)

Country Link
GB (1) GB418284A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009042380A1 (en) * 2007-09-28 2009-04-02 General Electric Company Core-shell particulates, articles, and method of making

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009042380A1 (en) * 2007-09-28 2009-04-02 General Electric Company Core-shell particulates, articles, and method of making

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