[go: up one dir, main page]

GB729449A - Method of forming composite metal coatings on refractory metal - Google Patents

Method of forming composite metal coatings on refractory metal

Info

Publication number
GB729449A
GB729449A GB7381/52A GB738152A GB729449A GB 729449 A GB729449 A GB 729449A GB 7381/52 A GB7381/52 A GB 7381/52A GB 738152 A GB738152 A GB 738152A GB 729449 A GB729449 A GB 729449A
Authority
GB
United Kingdom
Prior art keywords
coating
layer
hydride
refractory
carbide
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
GB7381/52A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB729449A publication Critical patent/GB729449A/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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/60—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes
    • C23C8/62—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes only one element being applied
    • C23C8/64—Carburising

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Products (AREA)

Abstract

A process for producing a carbide layer on a core of refractory metal comprises applying a layer of a hydride of a second refractory material, firing to convert the hydride to a refractory coating, applying a layer of carbon onto the coating and firing to produce a carbide of the interface portions of the base and coating. The process is applicable to the production of a non-emissive electrode, in which case the carbide acts as a barrier layer onto which a non-emissive substance such as carbon or platinum may be applied. Suitable base metals are tantalum, columbrium, molybdenum, tungsten and their alloys; suitable hydrides are. those of zirconium, silicon and tantalum. Firing temperatures of 1400-2000 DEG C. are referred to, and the coating with hydride is preferably effected by cataphoresis. Specification 660,076 is referred to.
GB7381/52A 1951-05-11 1952-03-21 Method of forming composite metal coatings on refractory metal Expired GB729449A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US729449XA 1951-05-11 1951-05-11

Publications (1)

Publication Number Publication Date
GB729449A true GB729449A (en) 1955-05-04

Family

ID=22110722

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7381/52A Expired GB729449A (en) 1951-05-11 1952-03-21 Method of forming composite metal coatings on refractory metal

Country Status (1)

Country Link
GB (1) GB729449A (en)

Similar Documents

Publication Publication Date Title
ES2050360T3 (en) SILVER CATALYST FOR THE PRODUCTION OF ETHYLENE OXIDE AND METHOD FOR ITS MANUFACTURE.
US1990277A (en) Metals of the platinum group and certain alloys
GB1393211A (en) Manufacture of shaped hollow bodies of silicon or silicon carbide
US2528454A (en) Coating process
GB598181A (en) A process for the coating of metal powders
GB729449A (en) Method of forming composite metal coatings on refractory metal
US3393084A (en) Coating carbon substrates with refractory metal carbides
US3200015A (en) Process for coating high temperature alloys
US3192065A (en) Method of forming molybdenum silicide coating on molybdenum
US1936334A (en) Electrode
US816928A (en) Process of producing ammonia.
GB626357A (en) Improvements in or relating to methods of forming metal coatings on bases of ceramic, refractory or high melting point vitreous material
GB475878A (en) An improved method for joining ceramic bodies to one another or to metallic bodies
GB676913A (en) Improvements relating to the production of adherent coatings on metallic bodies
CN109722665A (en) A kind of preparation method of molybdenum-based material surface protective coating
US2517762A (en) Bearing manufacture
GB985174A (en) Preparation of cermets
DE1621280C2 (en) Gas plating process for the production of hard coatings
US1630045A (en) Centrifugal casting of metals
GB660076A (en) Improvements in or relating to metallic structures
JPS5227826A (en) Process for producing composite fibrous materials
US952901A (en) Method of producing conductive layers on ceramic wares.
GB574737A (en) Improvements in or relating to metallic coatings on iron and steel
GB723899A (en) Improvement in protective coating for molybdenum and molybdenum base alloys
Antonova Mechanism of Formation of Ni--Cr--Si--B--P Coatings in Air