JPS5541903A - Production of high dimensional accuracy moldings - Google Patents

Production of high dimensional accuracy moldings

Info

Publication number
JPS5541903A
JPS5541903A JP11238978A JP11238978A JPS5541903A JP S5541903 A JPS5541903 A JP S5541903A JP 11238978 A JP11238978 A JP 11238978A JP 11238978 A JP11238978 A JP 11238978A JP S5541903 A JPS5541903 A JP S5541903A
Authority
JP
Japan
Prior art keywords
powder
mold
moldings
dimensional accuracy
pressure transmitting
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.)
Pending
Application number
JP11238978A
Other languages
Japanese (ja)
Inventor
Masae Nakanishi
Tadashi Miyano
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11238978A priority Critical patent/JPS5541903A/en
Publication of JPS5541903A publication Critical patent/JPS5541903A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/658—Atmosphere during thermal treatment
    • C04B2235/6587—Influencing the atmosphere by vaporising a solid material, e.g. by using a burying of sacrificial powder

Landscapes

  • Powder Metallurgy (AREA)

Abstract

PURPOSE: To obtain the moldings of superior dimensional accuracy by burying the preforms in a powder pressure transmitting medium and hot-pressing the same in the molds having the specific inside dimensions with the maximum transverse size of said preforms as a reference.
CONSTITUTION: The preform obtained by molding ceramic powder or metal powder to a square plate (column), disc (column) or the like by ordinary methods such as die molding or other is buried in a powder pressure transmitting medium (e.g., graphite, boron nitride powder, etc.) in the undermentioned mold, thence it is hot pressed under about 150W600Kg/cm2 (temperature is 1400W1850°C in the case of boron nitride and 1800W2350°C in the case of SiC). Namely, the mold (e.g., carbon mold) having the inside dimensions less than 1.5 times the transverse maximum dimensions of the preform. This method yields the moldings of superior dimensional accuracy because the shrinkage in the transverse direction is suppressed. Further, the mold can be smaller in size, the amount of using the powder pressure transmitting medium can be smaller and the filling work becomes shorter in time.
COPYRIGHT: (C)1980,JPO&Japio
JP11238978A 1978-09-14 1978-09-14 Production of high dimensional accuracy moldings Pending JPS5541903A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11238978A JPS5541903A (en) 1978-09-14 1978-09-14 Production of high dimensional accuracy moldings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11238978A JPS5541903A (en) 1978-09-14 1978-09-14 Production of high dimensional accuracy moldings

Publications (1)

Publication Number Publication Date
JPS5541903A true JPS5541903A (en) 1980-03-25

Family

ID=14585442

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11238978A Pending JPS5541903A (en) 1978-09-14 1978-09-14 Production of high dimensional accuracy moldings

Country Status (1)

Country Link
JP (1) JPS5541903A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50126702A (en) * 1974-03-28 1975-10-06

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50126702A (en) * 1974-03-28 1975-10-06

Similar Documents

Publication Publication Date Title
ATE238977T1 (en) METHOD FOR PRODUCING A DENSE CERAMIC WORKPIECE
JPS544895A (en) Production of impermeable carbon molded element
SE8600965L (en) SET TO MANUFACTURE METAL PRODUCTS THROUGH HEATISOSTAT PRESSURE
DE3261469D1 (en) Sinterable composition based on titanium diboride and application thereof for producing sintered articles
ES8401919A1 (en) Production of marble granulate blocks
JPS5541903A (en) Production of high dimensional accuracy moldings
GB1419400A (en)
SE8502882D0 (en) METHOD OF MOLDING POWDER MATERIALS
DE68926338D1 (en) Process for the electrical strengthening of a preformed single workpiece
GB1496847A (en) Method of uniformly compressing an article in a die and support material used therefor
JPS5413571A (en) Production of composite structure
DE3378044D1 (en) Method of making an anisotropic silicon nitride comprising object by use of higher density and fully reacted preforms
JPS57187232A (en) Method and device for resin compression molding
GB1192617A (en) Particulate Resins and Moulding Process Utilising them
Morris Cold Isostatic Pressing for Forming Advanced Ceramics
JPS6475604A (en) Method for molding aluminum alloy powder
JPS51119056A (en) Production method of tetrafluoroethylene resin molded materials
Okuda Present situation in the field of processing of structural Ceramics
BE804319A (en) Shaped polycrystalline diamond agglomerate prodn - by moulding in a shape which allows for shrinkage
DE69401655D1 (en) Process for producing a ferrite molded article
JPS52113400A (en) Wafer-shaped doping material based on aluminum metaphosphate and produ ction thereof
Lukacs Process for Molding Ceramics Using a Liquid, Curable Ceramic Precursor
GB1371894A (en) Fabrication of shaped artefacts
Nishida Hot pressing of silicon nitride articles with high volume
GIACHELLO et al. Fabrication and properties of a pressureless sintered silicon nitride based on Y 2 O 3 as sintering aid