FR2435987A1 - Procede pour fabriquer des corps moules finement poreux constitues en un metal a point de fusion eleve, notamment des cathodes a reserve pour des enceintes electriques a decharge - Google Patents

Procede pour fabriquer des corps moules finement poreux constitues en un metal a point de fusion eleve, notamment des cathodes a reserve pour des enceintes electriques a decharge

Info

Publication number
FR2435987A1
FR2435987A1 FR7922194A FR7922194A FR2435987A1 FR 2435987 A1 FR2435987 A1 FR 2435987A1 FR 7922194 A FR7922194 A FR 7922194A FR 7922194 A FR7922194 A FR 7922194A FR 2435987 A1 FR2435987 A1 FR 2435987A1
Authority
FR
France
Prior art keywords
melting point
point metal
cathodes
molded bodies
bodies made
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.)
Granted
Application number
FR7922194A
Other languages
English (en)
Other versions
FR2435987B1 (fr
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of FR2435987A1 publication Critical patent/FR2435987A1/fr
Application granted granted Critical
Publication of FR2435987B1 publication Critical patent/FR2435987B1/fr
Granted 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/18—After-treatment
    • C23C4/185—Separation of the coating from the substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

L'invention concerne un procédé pour fabriquer des corps moulés finement poreux constitués en un métal à point de fusion élevé, notamment de cathodes à réserve pour des enceintes électriques à décharge. Selon ce procédé le métal à point de fusion élevé est projeté avec un pistolet à vitesse de projection élevée dans un moule possédant des contours prédéterminés. Application notamment à la fabrication de tubes à décharge électrique.
FR7922194A 1978-09-15 1979-09-05 Procede pour fabriquer des corps moules finement poreux constitues en un metal a point de fusion eleve, notamment des cathodes a reserve pour des enceintes electriques a decharge Granted FR2435987A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782840276 DE2840276C3 (de) 1978-09-15 1978-09-15 Anwendung des Plasma-Pulverspritzens hochschmelzender Metalle auf die Herstellung feinporiger Vorratskathoden für elektrische Entladungsgefäße

Publications (2)

Publication Number Publication Date
FR2435987A1 true FR2435987A1 (fr) 1980-04-11
FR2435987B1 FR2435987B1 (fr) 1983-11-10

Family

ID=6049581

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7922194A Granted FR2435987A1 (fr) 1978-09-15 1979-09-05 Procede pour fabriquer des corps moules finement poreux constitues en un metal a point de fusion eleve, notamment des cathodes a reserve pour des enceintes electriques a decharge

Country Status (3)

Country Link
DE (1) DE2840276C3 (fr)
FR (1) FR2435987A1 (fr)
GB (1) GB2032467A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4418124A (en) 1980-10-06 1983-11-29 General Electric Company Plasma spray-cast components
US4447466A (en) * 1981-08-14 1984-05-08 General Electric Company Process for making plasma spray-cast components using segmented mandrels
KR910006044B1 (ko) * 1988-11-12 1991-08-12 삼성전관 주식회사 디스펜서 캐소오드의 제조방법

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1215417A (fr) * 1957-12-03 1960-04-19 Union Carbide Corp Objet manufacturé recouvert d'une couche ou se composant de matières réfractaires pures
FR1498225A (fr) * 1965-11-09 1967-10-13 Basf Ag Procédé de préparation de cathodes poreuses pour éléments de piles à combustible ou cellules électrochimiques de mesure
DE1299969B (de) * 1964-12-18 1969-07-24 Nassovia Werkzeugmaschf Herstellung von Elektroden fuer die Funkenerosion
FR2366876A1 (fr) * 1976-10-05 1978-05-05 Fives Cail Babcock Tamis pour essoreuse centrifuge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1215417A (fr) * 1957-12-03 1960-04-19 Union Carbide Corp Objet manufacturé recouvert d'une couche ou se composant de matières réfractaires pures
DE1299969B (de) * 1964-12-18 1969-07-24 Nassovia Werkzeugmaschf Herstellung von Elektroden fuer die Funkenerosion
FR1498225A (fr) * 1965-11-09 1967-10-13 Basf Ag Procédé de préparation de cathodes poreuses pour éléments de piles à combustible ou cellules électrochimiques de mesure
FR2366876A1 (fr) * 1976-10-05 1978-05-05 Fives Cail Babcock Tamis pour essoreuse centrifuge

Also Published As

Publication number Publication date
GB2032467A (en) 1980-05-08
DE2840276A1 (de) 1980-03-27
FR2435987B1 (fr) 1983-11-10
DE2840276B2 (de) 1980-07-10
DE2840276C3 (de) 1981-03-12

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Legal Events

Date Code Title Description
ST Notification of lapse