WO1988007901A1 - Moulage et coulage de precision utilisant des systemes fortement charges - Google Patents

Moulage et coulage de precision utilisant des systemes fortement charges Download PDF

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Publication number
WO1988007901A1
WO1988007901A1 PCT/US1988/001257 US8801257W WO8807901A1 WO 1988007901 A1 WO1988007901 A1 WO 1988007901A1 US 8801257 W US8801257 W US 8801257W WO 8807901 A1 WO8807901 A1 WO 8807901A1
Authority
WO
WIPO (PCT)
Prior art keywords
process according
dispersion
fluid
particles
includes removing
Prior art date
Application number
PCT/US1988/001257
Other languages
English (en)
Inventor
Bruce E. Novich
Mark A. Occhionero
Original Assignee
Ceramic Systems Corporation
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 Ceramic Systems Corporation filed Critical Ceramic Systems Corporation
Publication of WO1988007901A1 publication Critical patent/WO1988007901A1/fr

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Classifications

    • 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
    • B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
    • B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
    • 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
    • B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
    • 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
    • B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
    • B22F3/222—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by freeze-casting or in a supercritical fluid
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/111—Fine ceramics
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
    • C04B35/62625—Wet mixtures
    • C04B35/6263—Wet mixtures characterised by their solids loadings, i.e. the percentage of solids
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
    • C04B35/62645—Thermal treatment of powders or mixtures thereof other than sintering
    • C04B35/62655—Drying, e.g. freeze-drying, spray-drying, microwave or supercritical drying
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5445—Particle size related information expressed by the size of the particles or aggregates thereof submicron sized, i.e. from 0,1 to 1 micron
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/602—Making the green bodies or pre-forms by moulding
    • C04B2235/6027—Slip casting

Definitions

  • transition concentration where the suspension is fluid. This suspension is suitable for a variety of forming operations, including, but not limited to: slip casting, drain casting, tape casting, and injection molding. A preferred typical solids concentration chosen is in the range of approximately 59 to 61 volume percent.
  • One method of preparing these highly loaded suspensions can be found in the above-referenced patent application serial number 856,803.
  • Example 3 The same general procedure of Example 1 was followed, except pieces were slip cast in a covered Plaster of Paris mold.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

Nouveau procédé de moulage basé sur l'utilisation d'une bouillie de particules situées dans une plage de tailles étroite, et contenant une fraction volumétrique de solides située juste au-dessous du point de transition rhéologique, de manière à permettre le déversement de la bouillie. Le retrait d'une petite quantité de fluide poreux provoque la solidification de la bouillie qui peut être séchée jusqu'à obtention d'une pièce à l'état vert avec pratiquement aucun rétrécissement au séchage.
PCT/US1988/001257 1987-04-09 1988-04-11 Moulage et coulage de precision utilisant des systemes fortement charges WO1988007901A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US3608587A 1987-04-09 1987-04-09
US036,085 1987-04-09

Publications (1)

Publication Number Publication Date
WO1988007901A1 true WO1988007901A1 (fr) 1988-10-20

Family

ID=21886532

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1988/001257 WO1988007901A1 (fr) 1987-04-09 1988-04-11 Moulage et coulage de precision utilisant des systemes fortement charges

Country Status (2)

Country Link
AU (1) AU1728688A (fr)
WO (1) WO1988007901A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0525325A1 (fr) * 1991-06-22 1993-02-03 Forschungszentrum Jülich Gmbh Procédé pour la préparation d'articles frittés denses
EP0538073A2 (fr) * 1991-10-18 1993-04-21 Fujitsu Limited Procédé pour la préparation d'articles frittés et corps magnétique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2964823A (en) * 1954-04-20 1960-12-20 Norton Co Process of making recrystallized silicon carbide articles
US4341725A (en) * 1977-12-13 1982-07-27 Weaver Gerald Q Molding refractory and metal shapes by slip-casting
US4677082A (en) * 1984-11-20 1987-06-30 Imperial Chemical Industries Plc Composition comprising ceramic particles
US4734237A (en) * 1986-05-15 1988-03-29 Allied Corporation Process for injection molding ceramic composition employing an agaroid gell-forming material to add green strength to a preform
US4737326A (en) * 1984-12-05 1988-04-12 Didier-Werke Ag Refractory shapes of ceramic fiber-containing material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2964823A (en) * 1954-04-20 1960-12-20 Norton Co Process of making recrystallized silicon carbide articles
US4341725A (en) * 1977-12-13 1982-07-27 Weaver Gerald Q Molding refractory and metal shapes by slip-casting
US4677082A (en) * 1984-11-20 1987-06-30 Imperial Chemical Industries Plc Composition comprising ceramic particles
US4737326A (en) * 1984-12-05 1988-04-12 Didier-Werke Ag Refractory shapes of ceramic fiber-containing material
US4734237A (en) * 1986-05-15 1988-03-29 Allied Corporation Process for injection molding ceramic composition employing an agaroid gell-forming material to add green strength to a preform

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CERAMIC BULLETIN, Volume 50, No. 5, issued 1971, G.W. PHELPS et al., "Role of Particle-Size Distribution in Nonclay Slip Rheology", see pages 720-722. *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0525325A1 (fr) * 1991-06-22 1993-02-03 Forschungszentrum Jülich Gmbh Procédé pour la préparation d'articles frittés denses
EP0538073A2 (fr) * 1991-10-18 1993-04-21 Fujitsu Limited Procédé pour la préparation d'articles frittés et corps magnétique
EP0538073A3 (en) * 1991-10-18 1993-12-15 Fujitsu Ltd Process for producing sintered body and magnet base

Also Published As

Publication number Publication date
AU1728688A (en) 1988-11-04

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