GB754499A - Improvements relating to the bonding of metal borides to graphite - Google Patents

Improvements relating to the bonding of metal borides to graphite

Info

Publication number
GB754499A
GB754499A GB21141/54A GB2114154A GB754499A GB 754499 A GB754499 A GB 754499A GB 21141/54 A GB21141/54 A GB 21141/54A GB 2114154 A GB2114154 A GB 2114154A GB 754499 A GB754499 A GB 754499A
Authority
GB
United Kingdom
Prior art keywords
graphite
bonding
july
melting
improvements relating
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
GB21141/54A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB754499A publication Critical patent/GB754499A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J9/042—Manufacture, activation of the emissive part
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

754,499. Cathode material and processing. GENERAL ELECTRIC CO. July 20, 1954 [July 20, 1953], No. 21141/54. Drawings to Specification. Class 39 (1). A cathode is made by melting a metal boride on a graphite support. The melting should be carried out with a movable heat source such as an electric arc so that already melted portions are not further heated so that they attack the graphite. The preferred boride is lanthanum hexaboride but borides of rare earths, alkaline earths, thorium or uranium or mixtures may be employed. It is introduced into a recess in the graphite block in the form of a compressed powder block of the right shape. Specification 683,940 is referred to.
GB21141/54A 1953-07-20 1954-07-20 Improvements relating to the bonding of metal borides to graphite Expired GB754499A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US369175A US2900281A (en) 1953-07-20 1953-07-20 Method of bonding metal borides to graphite

Publications (1)

Publication Number Publication Date
GB754499A true GB754499A (en) 1956-08-08

Family

ID=23454404

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21141/54A Expired GB754499A (en) 1953-07-20 1954-07-20 Improvements relating to the bonding of metal borides to graphite

Country Status (3)

Country Link
US (1) US2900281A (en)
FR (1) FR66913E (en)
GB (1) GB754499A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3119171A (en) * 1958-07-23 1964-01-28 Texas Instruments Inc Method of making low resistance electrical contacts on graphite
DE3203917A1 (en) * 1981-05-29 1982-12-16 Denki Kagaku Kogyo K.K., Tokyo THERMIONIC EMISSION CATHODE AND METHOD FOR PRODUCING THE SAME

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348929A (en) * 1962-04-16 1967-10-24 Metalurgitschen Zd Lenin Protecting carbon materials from oxidation
US3285697A (en) * 1963-04-03 1966-11-15 Li Pei-Ching Method for making single crystal graphite sheets
US3521884A (en) * 1965-03-22 1970-07-28 Dow Chemical Co Article with an expanded vermicular graphite core
JPS53128971A (en) * 1977-04-18 1978-11-10 Hitachi Ltd Manufacture of electron radiation cathode
FR2445605A1 (en) * 1978-12-27 1980-07-25 Thomson Csf DIRECT HEATING CATHODE AND HIGH FREQUENCY ELECTRONIC TUBE COMPRISING SUCH A CATHODE
US5871848A (en) * 1987-05-22 1999-02-16 Oregon Graduate Institute Of Science & Technology Enhanced-wetting, boron-based liquid-metal ion source and method

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1262134A (en) * 1914-06-02 1918-04-09 Georg Stoelle Apparatus for making metallic coatings.
US1162149A (en) * 1914-10-22 1915-11-30 Engelhardt A Eckhardt Process of making wear-withstanding coat.
US1589017A (en) * 1918-10-11 1926-06-15 John C Lincoln Method and means for electric-arc welding
US1858413A (en) * 1929-12-30 1932-05-17 Ig Farbenindustrie Ag Calcium boride
US1948382A (en) * 1931-09-02 1934-02-20 Nat Carbon Co Inc Oxidation resisting carbon article
US2459812A (en) * 1946-05-31 1949-01-25 Standard Telephones Cables Ltd Welding apparatus
US2592414A (en) * 1947-11-08 1952-04-08 Air Reduction Method of producing hard-faced metal
US2659685A (en) * 1950-03-31 1953-11-17 Gen Electric Boride cathodes
US2678870A (en) * 1950-06-21 1954-05-18 Walter M Weil Manufacture of refractory metal borides
US2671735A (en) * 1950-07-07 1954-03-09 Bell Telephone Labor Inc Electrical resistors and methods of making them
US2755199A (en) * 1951-02-19 1956-07-17 Kellogg M W Co Hard coated composite and method of forming

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3119171A (en) * 1958-07-23 1964-01-28 Texas Instruments Inc Method of making low resistance electrical contacts on graphite
DE3203917A1 (en) * 1981-05-29 1982-12-16 Denki Kagaku Kogyo K.K., Tokyo THERMIONIC EMISSION CATHODE AND METHOD FOR PRODUCING THE SAME

Also Published As

Publication number Publication date
FR66913E (en) 1957-10-31
US2900281A (en) 1959-08-18

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