KR950704075A - 분말 세라믹 및 서멧을 1400℃ 초과의 온도에서 조밀화시키는 방법(A process for densifying powdered ceramics and cermets at temperatures above 1400℃) - Google Patents
분말 세라믹 및 서멧을 1400℃ 초과의 온도에서 조밀화시키는 방법(A process for densifying powdered ceramics and cermets at temperatures above 1400℃)Info
- Publication number
- KR950704075A KR950704075A KR1019950702443A KR19950702443A KR950704075A KR 950704075 A KR950704075 A KR 950704075A KR 1019950702443 A KR1019950702443 A KR 1019950702443A KR 19950702443 A KR19950702443 A KR 19950702443A KR 950704075 A KR950704075 A KR 950704075A
- Authority
- KR
- South Korea
- Prior art keywords
- flow pressure
- transfer medium
- alumina
- calcium aluminate
- aluminate cement
- Prior art date
Links
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
- B22F3/12—Both compacting and sintering
-
- 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
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F3/15—Hot isostatic pressing
-
- 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
- B22F3/12—Both compacting and sintering
- B22F3/1208—Containers or coating used therefor
- B22F3/1216—Container composition
-
- 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
- C04B35/64—Burning or sintering processes
- C04B35/645—Pressure sintering
- C04B35/6455—Hot isostatic pressing
-
- 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
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Powder Metallurgy (AREA)
Abstract
알루미나와 칼슘 알루미네이트 시멘트의 혼합물로부터 제조된 유동 다이를 사용하여 1400℃이상의 은도에서 세라믹 또는 금속 또는 둘다인 분말 물질을 조밀화시키는 방법. 유동 다이는 흑연박과 같은 차단 물질에 의해 압력-전달 매질로부터 분리될수 있다.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
Claims (10)
- 유동 압력-전달 매질로 둘러싸인 분말체를 포함하고, 이 매질 및 예비성형체가 칼슘 알루미네이트 시멘트 및 알루미나의 혼합물인 단일체성 다이 물질로부터 제조된 쉘 내에 함유되어 있는, 균일 다이 집합체(isostatic die assembly)를 단조가압기에서 1400℃초과 내지 1800℃의 범위내의 온도, 목적한 형태의 조밀함 응집체를 형성하기에 충분한 시간 및 압력의 조밀화 조건(이 조밀화 조건에서 유동 압력-전달 매질은 단일체성 다이 물질과 사실상 비반응성이다)에 적용시킴으로써 예정된 밀도를 갖는 조밀한 응집체를 제조하는 방법.
- 유동 압력-전달 매질로 둘러싸인 분말체를 포함하고, 이 매질 및 예비성형체가 칼슘 알루미네이트 시멘트 및 알루미나의 혼합물인 단일체성 다이 물질로부터 제조된 쉘내에 함유되어 있고, 이 쉘은 쉘과 유동 압력-전달 매질 사이의 반응을 사실상 방해하는 1개 이상의 차단 물질층에 의해 유동 압력-전달 매질로부터 분리되어 있는, 균일 다이 집합체를, 단조가압기에서 1400℃초과 내지 1975℃의 범위내의 온도, 목적한 형태의 조밀한 응집체를 형성시키기 충분한 시간 및 압력의 조밀화 조건에 적용시킴으로써 예정된 밀도를 갖는 조밀한 응집체를 형성시키는 방법.
- 제1항 또는 제2항에 있어서, 칼슘 알루미네이트 시멘트 및 알루미나가 조밀화 조건하에서 사실상 모든 유동 압력-전달 매질을 보유하면서 변형되는 쉘을 제공하기에 충분한 비율로 존재하는 방법.
- 제3항에 있어서, 비율이 칼슘 알루미네이트 시멘트 5내지 80중량부 및 알루미나 95내지 20중량부인 방법.
- 제3항에 있어서, 비율이 칼슘 알루미네이트 시멘트 5내지 40중량부 및 알루미나 95내지 60중량부인 방법.
- 제1항에 있어서, 유동 압력-전달 매질이 1개이상의 차단물질층에 의해 다이로부터 분리되는 방법.
- 제2항 또는 제6항에 있어서, 차단 물질이 흑연박인 방법.
- 제1항 또는 제2항에 있어서, 예정된 밀도가 이론치 밀도의 50내지 100%인 방법.
- 제8항에 있어서, 예정된 밀도가 이론치 밀도의 95%초과인 방법.
- 제1항 또는 제2항에 있어서, 시간이 0.5초 내지 3시간이고, 압력이 68.9MPa내지 83MPa인 방법.※ 참고사항:최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/802,384 US5374392A (en) | 1991-12-04 | 1991-12-04 | Process for densification of powdered ceramics and cermets at temperatures above 1400 degrees centigrade |
CA002151143A CA2151143A1 (en) | 1991-12-04 | 1992-12-15 | A process for densifying powdered ceramics and cermets at temperatures above 1400°c |
PCT/US1992/010865 WO1994013419A1 (en) | 1991-12-04 | 1992-12-15 | A process for densifying powdered ceramics and cermets at temperatures above 1400 °c |
Publications (1)
Publication Number | Publication Date |
---|---|
KR950704075A true KR950704075A (ko) | 1995-11-17 |
Family
ID=25678003
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950702443A KR950704075A (ko) | 1991-12-04 | 1992-12-15 | 분말 세라믹 및 서멧을 1400℃ 초과의 온도에서 조밀화시키는 방법(A process for densifying powdered ceramics and cermets at temperatures above 1400℃) |
Country Status (4)
Country | Link |
---|---|
US (1) | US5374392A (ko) |
EP (1) | EP0674556B1 (ko) |
KR (1) | KR950704075A (ko) |
WO (1) | WO1994013419A1 (ko) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993017141A1 (en) * | 1992-02-20 | 1993-09-02 | The Dow Chemical Company | Rhenium-bound tungsten carbide composites |
US6425805B1 (en) | 1999-05-21 | 2002-07-30 | Kennametal Pc Inc. | Superhard material article of manufacture |
US6372012B1 (en) | 2000-07-13 | 2002-04-16 | Kennametal Inc. | Superhard filler hardmetal including a method of making |
US6908688B1 (en) | 2000-08-04 | 2005-06-21 | Kennametal Inc. | Graded composite hardmetals |
US6686305B1 (en) * | 2002-09-25 | 2004-02-03 | Corning Incorporated | Methods of making low thermal expansion calcium aluminate articles |
US6689707B1 (en) * | 2003-04-01 | 2004-02-10 | Corning Incorporated | Low thermal expansion calcium aluminate articles |
US7651657B2 (en) * | 2003-06-20 | 2010-01-26 | Crs Holdings, Inc. | Manufacturing of controlled porosity metallic tools |
EP1633514B1 (en) * | 2003-06-20 | 2007-08-29 | CRS Holdings, Inc. | Manufactruring of controlled porosity metallic tools |
US20050147520A1 (en) * | 2003-12-31 | 2005-07-07 | Guido Canzona | Method for improving the ductility of high-strength nanophase alloys |
CN100415640C (zh) * | 2005-05-24 | 2008-09-03 | 株洲硬质合金集团有限公司 | 超细高氮氮化钽粉末及其制备方法 |
CN100378244C (zh) * | 2006-04-27 | 2008-04-02 | 湖南大学 | 大型喷射沉积方形坯件致密化加工的方法及其装置 |
WO2011017166A1 (en) * | 2009-07-28 | 2011-02-10 | Alcoa Inc. | Composition for making wettable cathode in aluminum smelting |
US20130031952A1 (en) * | 2011-08-03 | 2013-02-07 | Robert Bosch Gmbh | Gas sensor with thermal shock protection |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3253936A (en) * | 1963-06-10 | 1966-05-31 | Socony Mobil Oil Co Inc | Castable fibrous refractory compositions and articles obtained therefrom |
US3507332A (en) * | 1965-11-29 | 1970-04-21 | Phillips Petroleum Co | High temperature cements |
US3356496A (en) * | 1966-02-25 | 1967-12-05 | Robert W Hailey | Method of producing high density metallic products |
US3748158A (en) * | 1967-07-03 | 1973-07-24 | Inst Cercetari Metalurgice | Refractory aluminous cements |
US3607325A (en) * | 1968-06-19 | 1971-09-21 | Lockheed Aircraft Corp | Refractory-ceramic composition and method |
US3700435A (en) * | 1971-03-01 | 1972-10-24 | Crucible Inc | Method for making powder metallurgy shapes |
US3963508A (en) * | 1974-11-18 | 1976-06-15 | Kaiser Aluminum & Chemical Corporation | Calcium aluminate cement |
SE426790B (sv) * | 1980-04-25 | 1983-02-14 | Asea Ab | Forfarande for isostatisk pressning av pulver i en kapsel |
US4428906A (en) * | 1982-04-28 | 1984-01-31 | Kelsey-Hayes Company | Pressure transmitting medium and method for utilizing same to densify material |
US5269845A (en) * | 1992-02-27 | 1993-12-14 | Cer-Con, Inc. | Calcium aluminate composition and process for making same |
-
1991
- 1991-12-04 US US07/802,384 patent/US5374392A/en not_active Expired - Lifetime
-
1992
- 1992-12-15 EP EP93901278A patent/EP0674556B1/en not_active Expired - Lifetime
- 1992-12-15 KR KR1019950702443A patent/KR950704075A/ko not_active Application Discontinuation
- 1992-12-15 WO PCT/US1992/010865 patent/WO1994013419A1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
WO1994013419A1 (en) | 1994-06-23 |
US5374392A (en) | 1994-12-20 |
EP0674556B1 (en) | 1997-03-12 |
EP0674556A1 (en) | 1995-10-04 |
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