GB564905A - Improvements relating to metal compositions - Google Patents

Improvements relating to metal compositions

Info

Publication number
GB564905A
GB564905A GB436043A GB436043A GB564905A GB 564905 A GB564905 A GB 564905A GB 436043 A GB436043 A GB 436043A GB 436043 A GB436043 A GB 436043A GB 564905 A GB564905 A GB 564905A
Authority
GB
United Kingdom
Prior art keywords
tungsten
copper
metal
product
permeating
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
GB436043A
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.)
COMPOUND ELECTRO METALS Ltd
FREDERICK RICHARD SIMS
Original Assignee
COMPOUND ELECTRO METALS Ltd
FREDERICK RICHARD SIMS
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 COMPOUND ELECTRO METALS Ltd, FREDERICK RICHARD SIMS filed Critical COMPOUND ELECTRO METALS Ltd
Priority to GB436043A priority Critical patent/GB564905A/en
Publication of GB564905A publication Critical patent/GB564905A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making non-ferrous alloys
    • C22C1/04Making non-ferrous alloys by powder metallurgy
    • C22C1/0475Impregnated alloys
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/02Contacts characterised by the material thereof
    • H01H1/021Composite material
    • H01H1/023Composite material having a noble metal as the basic material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Abstract

564,905. Composite metal. SIMS, F. R., and COMPOUND ELECTRO METALS, Ltd. March 17, 1943, No. 4360. [Class 82 (i)] [Also in Group XXII] Metal, of high electrical and thermal conductivity and of great hardness under conditions of prolonged high temperature and high mechanical pressure, is produced by permeating a porous mass of tungsten, molybdenum, silicon, boron or other hard heat-resistant metal with a metal such as silver or copper, this operation being carried out at a temperature below the melting point of the hard metal. The composite metal is employed in the manufacture of parts such as the arcing tips of contact assemblies of high-rupturing capacity switch-gear and die-facings for the electrodes of large flash-welding machines. In one method, short lengths of scrap tungsten rod are passed three times through a sledge mill and the product is sieved to isolate particles of from 1.168 to 2.362 mm. size which are placed loosely in a graphite mould which is then heated in a reducing atmosphere to 1300‹ C. or 1200‹ C. if copper or silver respectively is used as the permeating metal. After 15 minutes heating, strips of copper &c. are placed from time to time on top of the mould until a surplus remaining on the surface indicates that all the interstices have been filled, the resulting conglomerate being slowly cooled in an atmosphere of nitrogen. In another method, tungsten powder of less than 200 mesh is waxed pressed and sintered from 1250‹ to 1300‹ C. The product is crushed by pestle and mortar and particles as above are sifted out and treated as before. The resulting product may be crushed and again treated in a graphite mould as in the first method. In a further modification, the tungsten may be in the form of fine filaments. These may be pressed either along or with powdered tungsten formed in situ in the mass by reducing an oxide. Permeation of copper &c. thus takes place as before. An intimate mixture of copper and tungsten &c. may be formed prior to heating to melt the copper and in this case also the tungsten may be reduced in the mixture.
GB436043A 1943-03-17 1943-03-17 Improvements relating to metal compositions Expired GB564905A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB436043A GB564905A (en) 1943-03-17 1943-03-17 Improvements relating to metal compositions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB436043A GB564905A (en) 1943-03-17 1943-03-17 Improvements relating to metal compositions

Publications (1)

Publication Number Publication Date
GB564905A true GB564905A (en) 1944-10-18

Family

ID=9775702

Family Applications (1)

Application Number Title Priority Date Filing Date
GB436043A Expired GB564905A (en) 1943-03-17 1943-03-17 Improvements relating to metal compositions

Country Status (1)

Country Link
GB (1) GB564905A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2737456A (en) * 1951-02-09 1956-03-06 Allied Prod Corp Process of making powdered metal articles without briquetting
EP0133191A2 (en) * 1983-07-28 1985-02-20 Toyota Jidosha Kabushiki Kaisha Method for alloying substances and apparatus for practising the method
EP0368788A1 (en) * 1988-11-10 1990-05-16 Lanxide Technology Company, Lp. A method for forming metal matrix composite bodies with a dispersion casting technique and products produced thereby
EP0369928A1 (en) * 1988-11-10 1990-05-23 Lanxide Technology Company, Lp. A method for forming metal matrix composites having variable filler loadings and products produced thereby
FR2675063A1 (en) * 1991-04-09 1992-10-16 Renault Method for producing composite metallic components with metallic reinforcements

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2737456A (en) * 1951-02-09 1956-03-06 Allied Prod Corp Process of making powdered metal articles without briquetting
EP0133191A2 (en) * 1983-07-28 1985-02-20 Toyota Jidosha Kabushiki Kaisha Method for alloying substances and apparatus for practising the method
EP0133191A3 (en) * 1983-07-28 1985-04-03 Toyota Jidosha Kabushiki Kaisha Method for alloying substances and apparatus for practising the method
US4708847A (en) * 1983-07-28 1987-11-24 Toyota Jidosha Kabushiki Kaisha Method for alloying substances
EP0368788A1 (en) * 1988-11-10 1990-05-16 Lanxide Technology Company, Lp. A method for forming metal matrix composite bodies with a dispersion casting technique and products produced thereby
EP0369928A1 (en) * 1988-11-10 1990-05-23 Lanxide Technology Company, Lp. A method for forming metal matrix composites having variable filler loadings and products produced thereby
AU625093B2 (en) * 1988-11-10 1992-07-02 Lanxide Corporation A method for forming metal matrix composite bodies with a dispersion casting technique and products produced thereby
CN1065792C (en) * 1988-11-10 2001-05-16 兰克西敦技术公司 Method for forming metal matrix composite bodies with dispersion casting technique and products produced thereby
FR2675063A1 (en) * 1991-04-09 1992-10-16 Renault Method for producing composite metallic components with metallic reinforcements

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