GB536653A - Improvements in methods of producing powder consisting of particles all approximately of a predetermined size - Google Patents

Improvements in methods of producing powder consisting of particles all approximately of a predetermined size

Info

Publication number
GB536653A
GB536653A GB31721/39A GB3172139A GB536653A GB 536653 A GB536653 A GB 536653A GB 31721/39 A GB31721/39 A GB 31721/39A GB 3172139 A GB3172139 A GB 3172139A GB 536653 A GB536653 A GB 536653A
Authority
GB
United Kingdom
Prior art keywords
particles
binder
tungsten
porous
small
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
GB31721/39A
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 PLC
Original Assignee
General Electric Co 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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB31721/39A priority Critical patent/GB536653A/en
Publication of GB536653A publication Critical patent/GB536653A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/045—Alloys based on refractory metals
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/14—Treatment of metallic powder
    • B22F1/148—Agglomerating
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof

Landscapes

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

Abstract

536,653. Grinding, crushing, etc.; refractory substances ; rendering plastic compositions porous ; obtaining coherent masses from metal powders; porous metal bodies. GENERAL ELECTRIC CO., Ltd., and PIRANI, M. Dec. 7, 1939, No. 31721. [Classes 59 and 82 (i)] [Also in Groups V and XXII] A process for making relatively large particles, e.g. 100 Á in diameter, from relatively small particles, e.g. 8 Á in diameter, comprises pressing the small particles into a coherent body, soaking the body in a liquid binder and solidifying the binder as by heat, pulverizing the soaked, bound body, separating the required-e.g. the 100 Á - particles as by sieving, and heating the said particles to drive off the binder and sinter together the small particles contained in the larger particles. The particles may be of tungsten, molybdenum. clay or magnesia. In an example using tungsten powder the binder is a solution of ethyl cellulose in toluene; with the initial small tungsten particles may be mixed 0.05-1 per cent. of iron, to increase the hardness. The large particles, of different gradings, may be sintered together to produce a porous body. Before soaking, the body may be heated to drive out air.
GB31721/39A 1939-12-07 1939-12-07 Improvements in methods of producing powder consisting of particles all approximately of a predetermined size Expired GB536653A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB31721/39A GB536653A (en) 1939-12-07 1939-12-07 Improvements in methods of producing powder consisting of particles all approximately of a predetermined size

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31721/39A GB536653A (en) 1939-12-07 1939-12-07 Improvements in methods of producing powder consisting of particles all approximately of a predetermined size

Publications (1)

Publication Number Publication Date
GB536653A true GB536653A (en) 1941-05-22

Family

ID=10327394

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31721/39A Expired GB536653A (en) 1939-12-07 1939-12-07 Improvements in methods of producing powder consisting of particles all approximately of a predetermined size

Country Status (1)

Country Link
GB (1) GB536653A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2672415A (en) * 1948-07-23 1954-03-16 Fansteel Metallurgical Corp Production of porous silver bodies
US2671953A (en) * 1948-07-23 1954-03-16 Fansteel Metallurgical Corp Metal body of high porosity

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2672415A (en) * 1948-07-23 1954-03-16 Fansteel Metallurgical Corp Production of porous silver bodies
US2671953A (en) * 1948-07-23 1954-03-16 Fansteel Metallurgical Corp Metal body of high porosity

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