DE2338230A1 - COMPOSITE CERAMIC COMPONENT WITH METALLIC CONNECTING SURFACE, METHOD OF ITS MANUFACTURING AND ITS USE - Google Patents

COMPOSITE CERAMIC COMPONENT WITH METALLIC CONNECTING SURFACE, METHOD OF ITS MANUFACTURING AND ITS USE

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Publication number
DE2338230A1
DE2338230A1 DE19732338230 DE2338230A DE2338230A1 DE 2338230 A1 DE2338230 A1 DE 2338230A1 DE 19732338230 DE19732338230 DE 19732338230 DE 2338230 A DE2338230 A DE 2338230A DE 2338230 A1 DE2338230 A1 DE 2338230A1
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Prior art keywords
ceramic
metal
parts
individual
impregnated
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DE19732338230
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German (de)
Inventor
Alan John Surrall
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British Leyland Truck and Bus Div Ltd
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British Leyland Truck and Bus Div Ltd
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Publication of DE2338230A1 publication Critical patent/DE2338230A1/en
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    • 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
    • C04B37/00—Joining burned ceramic articles with other burned ceramic articles or other articles by heating
    • C04B37/003—Joining burned ceramic articles with other burned ceramic articles or other articles by heating by means of an interlayer consisting of a combination of materials selected from glass, or ceramic material with metals, metal oxides or metal salts
    • C04B37/006—Joining burned ceramic articles with other burned ceramic articles or other articles by heating by means of an interlayer consisting of a combination of materials selected from glass, or ceramic material with metals, metal oxides or metal salts consisting of metals or metal salts
    • 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
    • C04B37/00—Joining burned ceramic articles with other burned ceramic articles or other articles by heating
    • C04B37/003—Joining burned ceramic articles with other burned ceramic articles or other articles by heating by means of an interlayer consisting of a combination of materials selected from glass, or ceramic material with metals, metal oxides or metal salts
    • C04B37/005—Joining burned ceramic articles with other burned ceramic articles or other articles by heating by means of an interlayer consisting of a combination of materials selected from glass, or ceramic material with metals, metal oxides or metal salts consisting of glass or ceramic material
    • 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
    • C04B2235/6582—Hydrogen containing atmosphere
    • 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
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/02—Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
    • C04B2237/04—Ceramic interlayers
    • C04B2237/06—Oxidic interlayers
    • 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
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/02—Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
    • C04B2237/04—Ceramic interlayers
    • C04B2237/06—Oxidic interlayers
    • C04B2237/068—Oxidic interlayers based on refractory oxides, e.g. zirconia
    • 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
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/02—Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
    • C04B2237/12—Metallic interlayers
    • C04B2237/122—Metallic interlayers based on refractory metals
    • 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
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/02—Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
    • C04B2237/12—Metallic interlayers
    • C04B2237/123—Metallic interlayers based on iron group metals, e.g. steel
    • 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
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/02—Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
    • C04B2237/12—Metallic interlayers
    • C04B2237/125—Metallic interlayers based on noble metals, e.g. silver
    • 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
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32—Ceramic
    • C04B2237/36—Non-oxidic
    • C04B2237/368—Silicon nitride
    • 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
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/61—Joining two substrates of which at least one is porous by infiltrating the porous substrate with a liquid, such as a molten metal, causing bonding of the two substrates, e.g. joining two porous carbon substrates by infiltrating with molten silicon
    • 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
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/72—Forming laminates or joined articles comprising at least two interlayers directly next to each other

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Products (AREA)

Description

British Leyland Truck and Bus Division Limited, T.eyland, Lancashire, EnglandBritish Leyland Truck and Bus Division Limited, T.eyland, Lancashire, England

"Zusammengesetzter Keramikteil mit metallischer Verbindungsfläche, Verfahren zu seiner Herstellung und seine Verwendung""Composite ceramic part with metallic connection surface, Process for its manufacture and its use "

Priorität: 28. Juli 1972, Großbritannien, Nr. 35 290/72Priority: July 28, 1972, Great Britain, No. 35 290/72

Gegenstand der Erfindung ist ein aus mindestens zwei Einzelteilen zusammengesetzter Keramikteil mit einer metallischen Verbindungsfläche, die aus einem direkt in die angrenzenden Keramikflächen eingebrachten Metall und einer Zwischenschicht aus Lötlegierung besteht.The subject matter of the invention is a ceramic part composed of at least two individual parts with a metallic connecting surface which is made of one directly into the adjoining ceramic surfaces introduced metal and an intermediate layer made of solder alloy.

Derartige Keramikteile bestehen vorzugsweise aus Siliciumnitrid, und das für die Keramikflächen bevorzugte Metall ist Molybdän.Such ceramic parts are preferably made of silicon nitride and the preferred metal for the ceramic surfaces is molybdenum.

Die Erfindung betrifft ferner ein Verfahren zur Herstellung solcher zusammengesetzter Keramikteile mit geringer natürlicherThe invention also relates to a method for producing such composite ceramic parts with little natural

Porosität durch Verlöten.Soldering porosity.

409807/T034409807 / T034

Es sind verschiedene Verfahren zum Verlöten von Keramikteilen bekannt. Die Britische Patentschrift 656 724 beschreibt z.B. ein Verfahren, bei dem die zusammenzufügenden Flächen von zwei Keramikteilen zunächst unter Verwendung von feinverteilten Metallen hergestellt werden, die mittels eines Sinterungsprozesses mit den Keramikflächen verbunden werden. Bei der in "Industrial Brazing" von Brooker und Bratson beschriebenen Methoden werden speziell hergestellte, "extrem feine Metallpulver verwendet, die auf die beiden zusammenzufügenden Flächen d^r Kcr-in-'.kteile aufgestrichen werden, worauf die Keramikteile bei sehr hohen Temperaturen in Wasserstoff gebrannt werden. Die genannten Verfahren haben jedoch den Nachteil, dass nicht nur sehr feines Metallpulver verwendet werden muss, sondern dass auch anschliessend eine Behandlung von oft mehreren Stunden in einem Brennofen bei hohen Temperaturen in sehr reiner Gasatmosphäre erforderlich ist.Various methods of soldering ceramic parts are known. British patent specification 656 724 describes e.g. a process in which the surfaces of two ceramic parts to be joined are first made using finely divided metals which are connected to the ceramic surfaces by means of a sintering process. The one in "Industrial Brazing "methods described by Brooker and Bratson are made using specially prepared," extremely fine metal powders that on the two surfaces to be joined d ^ r Kcr-in - '. kteile painted whereupon the ceramic parts are burned in hydrogen at very high temperatures. Have the procedures mentioned however, the disadvantage that not only very fine metal powder has to be used, but also that subsequent treatment often several hours in a kiln at high temperatures in a very pure gas atmosphere.

Ein weiterer Gegenstand der Erfindung ist somit ein Verfahren zur Herstellung' eines Keramikteils, wobei die zusammenzufügenden Flächen der Keramik-Einzelteile mit einem Metallpulver bedeckt und dann durch eine Lötlegierung miteinander fest verbunden werden, das dadurch gekennzeichnet ist, dass manAnother object of the invention is thus a method for Production of a ceramic part, the surfaces of the individual ceramic parts to be joined being covered with a metal powder and are then firmly connected to one another by a soldering alloy, which is characterized in that one

a) die zusammenzufügenden Flächen mit einem Metallsalz imprägniert,a) the surfaces to be joined are impregnated with a metal salt,

b) anschliessend die imprägnierten Flächen in einer reduzierenden Atmosphäre behandelt undb) then the impregnated surfaces are treated in a reducing atmosphere and

c) die so gebildeten Metalloberflächen miteinander verlötet.c) the metal surfaces formed in this way are soldered to one another.

40980 7/103440980 7/1034

Die Erfindung wird anhand eines Beispiels sowie schematischer Darstellungen noch näher erläutert. Es zeigenThe invention is illustrated by way of example and more schematically Representations explained in more detail. Show it

•Fig. 1 einen Brennofen zur Durchführung des erfindungsgemässen Verfahrens und• Fig. 1 a kiln to carry out the inventive method and

Fig. 2 zwei erfindungsgemäss zusammengefügte Keramik-Einzelteile.2 shows two individual ceramic parts assembled according to the invention.

Die beiden zusammenzufügenden Keramikteile bestehen aus Siliciumnitrid und werden zunächst mit einer wässrigen Lösung eines geeigneten Salzes, z.B. Ammoniummolybdat, behandelt. Zweckmässig wird die Lösung auf die Oberflächen der Keramikteile aufgestrichen. Dann lässt man die aufgebrachte Lösung trocknen. Falls erforderlich, kann das Aufstreichen der Lösung ein- oder mehrmals wiederholt werden.The two ceramic parts to be joined are made of silicon nitride and are first treated with an aqueous solution of a suitable salt, e.g., ammonium molybdate. Appropriate the solution is brushed onto the surfaces of the ceramic parts. The applied solution is then allowed to dry. If If necessary, the solution can be spread one or more times be repeated.

Nachdem die Keramikteile bei Raumtemperatur vollständig getrocknet sind, werden sie in einem Brennofen bei einer Temperatur von etwa 6OO°C in einer reduzierenden Atmosphäre, z.B. in Wasserstoff,behandelt. Dadurch wird die Lösung sehr rasch zum Metall reduziert, und zwar innerhalb von 5 bis IO Minuten, nachdem die Keramikteile eine Temperatur von etwa 600°C erreicht haben. Anschliessend lässt man die Keramikteile noch in der reduzierenden Atmosphäre abkühlen. ·After the ceramic parts have dried completely at room temperature they are treated in a furnace at a temperature of about 600 ° C in a reducing atmosphere, e.g. in hydrogen. This reduces the solution to the metal very quickly, within 5 to 10 minutes after the ceramic parts have reached a temperature of around 600 ° C. The ceramic parts are then left in the reducing atmosphere cooling down. ·

Fig. 1 zeigt einen Röhrenofen 1, in dem der Brennvorgang durchgeführt werden kann.Fig. 1 shows a tube furnace 1 in which the firing process is carried out can be.

409807/103A409807 / 103A

- 4 - 233823Q- 4 - 233823Q

Der Brennofen 1 besteht im wesentlichen aus einer Röhre mit einem Bereich A, der die Keramikteile aufnimmt, einem Reduktionsbereich B, in dem die wässrige Lösung zum Metall reduziert wird, und
einem Kühlbereich C.The furnace 1 consists essentially of a tube with an area A, which receives the ceramic parts, a reduction area B, in which the aqueous solution is reduced to the metal, and
a cooling area C.

Die reduzierende Atmosphäre wird durch einen Einlass 2 eingeleitet. An beiden Enden der Röhre 1 sind Türen 3 und 4 vorgesehen, durch
die die Keramikteile in den Brennofen eingebracht und aus dem
Brennofen herausgenommen v/erden können.The reducing atmosphere is introduced through an inlet 2. At both ends of the tube 1, doors 3 and 4 are provided through
which brought the ceramic parts into the kiln and from the
Can be removed from the furnace.

Die wässrige Lösung ist bevorzugt eine 10- bis 30prozentige
Ammoniummolybdatlösung ((NH.) 3io-,0„ .. 4H„0) . Als reduzierendes Gas wird entweder Wasserstoff oder Kohlenmonoxid verwendet.The aqueous solution is preferably 10 to 30 percent
Ammonium molybdate solution ((NH.) 3io-, 0 ".. 4H" 0). Either hydrogen or carbon monoxide is used as the reducing gas.

Die beiden Keramikteile werden dann in an sich bekannter Weise
miteinander verlötet, d.h. die Keramikteile v/erden in einer Spannvorrichtung gehalten, und die zusammenzufügenden Flächen werden
durch ein geeignetes Lötmaterial miteinander verbunden. Dies wird in Fig. 2 beschrieben, in der Keramikteile 5 und 6 Metalloberflächen 7 und 8 aufweisen, die nach den oben beschriebenen Verfahren hergestellt worden sind.The two ceramic parts are then made in a manner known per se
soldered to one another, ie the ceramic parts are held in a clamping device and the surfaces to be joined are
connected to one another by a suitable soldering material. This is described in FIG. 2, in which ceramic parts 5 and 6 have metal surfaces 7 and 8 which have been produced according to the methods described above.

Das zwischen den so gebildeten Metalloberflächen 7 und 8 aufgebrachte Lot 9 ist z.B. eine silber- oder nickelhaltige Lötlegierung. That applied between the metal surfaces 7 and 8 thus formed Lot 9 is e.g. a silver or nickel containing solder alloy.

Der so vorbereitete Keramikteil wird dann entweder in einer reduzierenden oder in einer inerten Atmosphäre in einem Brennofen bei der zum Verlöten erforderlichen Temperatur behandelt.The ceramic part prepared in this way is then either in a reducing or treated in an inert atmosphere in a furnace at the temperature required for soldering.

409807/TO 3 4409807 / TO 3 4

Soll das Keramikteil bei im wesentliehen konstanter Temperatur eingesetzt werden, kann zum Herstellen der Metalloberfläche auch ein anderes Metall als Molybdän, z.B. Nickel oder Silber, verwendet werden. Die wässrige Lösung besteht dann vorzugsweise aus einer Lösung eines Silber- oder Nickelsalzes, z.B. eines entsprechenden Nitrats.Should the ceramic part be at a substantially constant temperature are used, a metal other than molybdenum, e.g. nickel or silver, can also be used to produce the metal surface will. The aqueous solution then preferably consists of a solution of a silver or nickel salt, for example an appropriate one Nitrate.

Die erfindungsgemassen Keramikteile eignen sich besonders als Bauelemente in Gasturbinen. Da sie in derartigen Anwendungsbereichen einem starken Tempoi^vurwechsel unterworfen sind, ist es wichtig, dass das in die Keramikflächen eingebrachte Metall einen ähnlichen Wärmeausdehnungs-Koeffizienten hat wie das Siliciumnitrid, aus dem die Keramikteile beispielsweise hergestellt sind.The inventive ceramic parts are particularly suitable as Components in gas turbines. Since they are subject to a sharp change in speed in such areas of application, it is It is important that the metal introduced into the ceramic surfaces has a coefficient of thermal expansion similar to that of silicon nitride, from which the ceramic parts are made, for example.

409807/1034409807/1034

Claims (9)

PatentansprücheClaims f 1. '; Aus mindestens zwei Einzelteilen zusammengesetzter Keramikteil mit einer metallischen Verbindungsfläche, die aus einem direkt in die angrenzenden Keramikflächen eingebrachten Metall und einer Zwischenschicht aus Lötlegierung besteht.f 1. '; Ceramic part composed of at least two individual parts with a metallic connecting surface, which consists of a metal introduced directly into the adjoining ceramic surfaces and an intermediate layer of soldering alloy. 2. Keramikteil nach Anspruch 1, dadurch gekennzeichnet, dass die Keramik-Einzelteile (5, 6) aus Siliciumnitrid und das eingebrachte Metall (7, 8) aus Molybdän besteht.2. Ceramic part according to claim 1, characterized in that the individual ceramic parts (5, 6) made of silicon nitride and the introduced metal (7, 8) consists of molybdenum. 3. Keramikteil nach Anspruch 1 und 2, dadurch gekennzeichnet, dass die Zwischenschicht (9) aus einer silber- oder nickelhaltigen Lötlegierung besteht.3. Ceramic part according to claim 1 and 2, characterized in that the intermediate layer (9) consists of a silver or nickel-containing Solder alloy is made. 4. Verfahren zur Herstellung eines Keramikteils nach Anspruch4. A method for producing a ceramic part according to claim 1 bis 3, wobei die zusammenzufügenden Flächen der Keramik-Einzelteile mit einem Metallpulver bedeckt und dann durch eine Lötlegierung miteinander fest verbunden v/erden, dadurch gekennzeichnet, dass man1 to 3, with the surfaces to be joined together of the individual ceramic parts covered with a metal powder and then firmly connected to one another by a solder alloy, characterized in that that he a) die zusammenzufügenden Flächen mit einem Metallsalz imprägniert,a) the surfaces to be joined are impregnated with a metal salt, b) anschliessend die imprägnierten Flächen in einer reduzierenden Atmosphäre behandelt undb) then the impregnated surfaces are treated in a reducing atmosphere and c) die so gebildeten Metalloberflächen miteinander verlötet.c) the metal surfaces formed in this way are soldered to one another. 409807/1034409807/1034 5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass man Keramik-Einzelteile aus Siliciumnitrid mit einer Molybdänsalzlösung imprägniert.5. The method according to claim 4, characterized in that ceramic individual parts made of silicon nitride with a molybdenum salt solution impregnated. 6. Verfahren nach Anspruch· 5, dadurch gekennzeichnet, dass man für die Imprägnierung eine 10- bis 30prozentige wässrige Lösung aus Ammoniummolybdat verwendet.6. The method according to claim 5, characterized in that a 10 to 30 percent aqueous solution of ammonium molybdate is used for the impregnation. 7. Verfahren nach Anspruch 4 bis 6, dadurch gekennzeichnet, dass man die Reduktion bei einer Temperatur von etv/a 6000C in Wasserstoff durchführt.7. The method according to claim 4 to 6, characterized in that a conducting the reduction at a temperature of etv / 600 0 C in hydrogen. 8. Verfahren nach Anspruch 4 bis 7, dadurch gekennzeichnet, dass man die Metallflächen mittels eines Silber- oder Nickellotes miteinander verbindet.8. The method according to claim 4 to 7, characterized in that the metal surfaces by means of a silver or nickel solder connects with each other. 9. Verwendung der Keramikteile nach Anspruch 1 bis 8 als Bauelemente in Gasturbinen.9. Use of the ceramic parts according to claim 1 to 8 as components in gas turbines. 4098Q7/1Q344098Q7 / 1Q34 LeerseiteBlank page
DE19732338230 1972-07-28 1973-07-27 COMPOSITE CERAMIC COMPONENT WITH METALLIC CONNECTING SURFACE, METHOD OF ITS MANUFACTURING AND ITS USE Pending DE2338230A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3529072A GB1387478A (en) 1972-07-28 1972-07-28 Method of brazing ceramic articles to one another

Publications (1)

Publication Number Publication Date
DE2338230A1 true DE2338230A1 (en) 1974-02-14

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DE19732338230 Pending DE2338230A1 (en) 1972-07-28 1973-07-27 COMPOSITE CERAMIC COMPONENT WITH METALLIC CONNECTING SURFACE, METHOD OF ITS MANUFACTURING AND ITS USE

Country Status (4)

Country Link
JP (1) JPS4993402A (en)
DE (1) DE2338230A1 (en)
GB (1) GB1387478A (en)
IT (1) IT991440B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0252518A1 (en) * 1986-07-11 1988-01-13 Kabushiki Kaisha Toshiba Circuit substrate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0252518A1 (en) * 1986-07-11 1988-01-13 Kabushiki Kaisha Toshiba Circuit substrate
US4835065A (en) * 1986-07-11 1989-05-30 Kabushiki Kaisha Toshiba Composite alumina-aluminum nitride circuit substrate

Also Published As

Publication number Publication date
JPS4993402A (en) 1974-09-05
GB1387478A (en) 1975-03-19
IT991440B (en) 1975-07-30

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