DE1571297A1 - Method of joining refractory bodies - Google Patents

Method of joining refractory bodies

Info

Publication number
DE1571297A1
DE1571297A1 DE19661571297 DE1571297A DE1571297A1 DE 1571297 A1 DE1571297 A1 DE 1571297A1 DE 19661571297 DE19661571297 DE 19661571297 DE 1571297 A DE1571297 A DE 1571297A DE 1571297 A1 DE1571297 A1 DE 1571297A1
Authority
DE
Germany
Prior art keywords
welding
refractory bodies
joining refractory
joining
silicon
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
DE19661571297
Other languages
German (de)
Inventor
Dipl-Ing Dr Ernst Gugel
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.)
Saint Gobain IndustrieKeramik Roedental GmbH
Original Assignee
Annawerk Keramische Betriebe GmbH
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 Annawerk Keramische Betriebe GmbH filed Critical Annawerk Keramische Betriebe GmbH
Publication of DE1571297A1 publication Critical patent/DE1571297A1/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
    • C04B35/565Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/58Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/584Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/58Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/584Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
    • C04B35/591Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride obtained by reaction sintering

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Arc Welding In General (AREA)
  • Ceramic Products (AREA)

Description

r e l " a1-:ren zum Verbinden feuerfester Körper n dun F; be z i_ eh t "i eh auf ein e r ren zlur TTerbn den ,y;G:..ari c@jten '"örpcrn, in@ibnsondere SiC- und Si. ,iT4 - Er- - _, z; `j"n,_ @s en, mit KLI_fe des PlektriFchen lchtboro-ens, wobei. der chweißstelle z@igelUhr-t wird. war bi^ :jetzt nicht möglich, keratiiische GPgen"itände, .. -_" t y -. ' A# y S , .b#jrjc re lür -'euF... #...-tc Zwecke ,-i-f; _r'c ca_nps eiß- .1,#@i^" @..fn s mi. Üeinander zu. verbinden. Dins gilt sowohl für @I_@@@r@:za,tur gehrochene=i° rrƒr@;en stänclt@; ci_ioaer Art a1=. auch Mt- @F:r@ Aa_-Cbau ;rein Bauelementen aus r"inzel-telen. 'ilollte man bisher s(;y'_or e keramischen, insbesondere feuer- festen 3i_örper miteinander verbinden, dann er @=ole;te dies dadurch, daß man sie mir-, L!ri- ebrann-i:en plastischen icera- mischen ""assen aneinander heftete und in einem zweiten Brand diese Hefts belle verfestigte. Dieses Tierfahren wirft jedoch eine Reihe von Problemen auf und hat daher in der Technik praktisch-keinen Eingang gefunden. Dies geht insbesondere daran.:.' zurück, daP sich die ungebrannte 1_ass.e nur schwer an die gebrannte i,Tasse anpaßt, was zu Spannungen führt. Auch ist die Ver--bindung außerordentlich schlecht, so daß damit die Festigkeit und Kaltbarkei t der Verbindungsnaht nur sehr gering. ist. rel " a1-: ren for joining refractory bodies n dun F; referring to one of the events , y; G: .. ari c @ jt en '"body, in @ ibns special SiC- and Si. , iT 4 - Er- - _, z; `j" n, _ @s en, with KLI_fe des PlektriFchen lchtboro-ens, where. the welding point is z @ igelUhr-t. was bi ^: now not possible, keratiiische GPgen "it would, .. -_ "ty -. ' A # y S , .b # jrjc re lür -'euF ... # ...- tc purposes, -if; _r'c ca_nps ice- .1, # @ i ^ "@ .. fn s mi. To connect to each other. Dins applies to both @I _ @@@ r @: za, tur gefaltene = i ° rrƒr @; en stänclt @; ci_ioaer type a1 =. even Mt- @F: r @ Aa_-Cbau ; purely components from individual telen. Up until now, one should have s (; y'_or e ceramic, especially fire connect solid 3i_body together, then he @ = ole; te this by being given to me-, L! ri- ebrann-i: en plastic icera- mix "" ate stuck together and in a second Brand solidified this booklet bark. However, this animal driving raises a number of problems and has therefore found virtually no entry in the art. This is especially true.:. ' back, that the unfired 1_ass.e adapts only with difficulty to the baked i, cup, which leads to tension. The connection is also extremely poor, so that the strength and coldness of the connection seam are very low. is.

Auch das Schweißen v::in keramischen Körpern mit Hilfe des elektrischen Nichtbogens i"t bis jetzt ohne Erfolg geblieben. Ein keramischer Körper ist ja normalerweise kein Schmelzprodukt. Eine Schwe=ißnaht, als kontinuierlicher geschmolzener Streifen in einem Keramikkörper macht den ganzen Keramikkörper zu einem lieteronenen Gebilde, das eine weitere 'Wiruiebehandlung im Sinne einer feuerfesten Anwendung nicht mehr aus1rält. Es -treten sehr bald neue Risse auf, die: erneut einer Sehweißung bedit_fen würden, wodurch sich je- doch d.as Gesamtprobloni nur -verschlimmert. Es ist auch bereits ein Tierfahren bekannt, bei dem man mit einem Gemisch aus Ilaolin-, Ton und Tonerde als Schweißmittel zum Verschweißen von- feuerfesten Schamotteplatten arbeitet. Dieses Verfabren ist jedoch nur dann anwendbar, wenn das geschweißte Produkt bei höchstens 10000 C. verwendet wird. Durch die Erfindung wird ein Verfahren zum verbinden `euerfester I<_örper, insbesondere SiC- und Si 3N 4 - Erzeugnissen unter Zuhilfenahme des elektrischen Ijic'Ztbögens geschaffen, bei dem ebenfalls ein Schweißmittel der Schweißstelle zage-Führt wird. Das erfindunf=sgemäße Verfahren unterscheide sich j-edoc1 von den bekannten ,erfahren dadurch, daß als Scl-weißmittel Y°epc=benenralls @-ering verunreinigter, Silizium-..Jetall dient unG. i n einer Sticltstoff-Atmosphäre geschweißt wird.Even welding in ceramic bodies with the help of the electric non-arc has so far remained unsuccessful. A ceramic body is normally not a fusion product. A weld seam, as a continuous melted strip in a ceramic body, makes the entire ceramic body into one This type of structure can no longer stand up to further treatment in the sense of a refractory application. Very soon new cracks appear which would require renewed vision, which, however, only worsens the overall problem. It is, too An animal driving is already known, in which one works with a mixture of Ilaolin, clay and alumina as welding agent for welding of refractory fireclay panels. However, this method is only applicable if the welded product is used at a maximum of 10,000 C. Invention is a method for connecting fire-resistant I <_bodies, in particular SiC and Si 3N 4 products under To With the help of the electrical Ijic'Ztbogen created, in which a welding means is also zage-guides the welding point. The method according to the invention differs from the known, experienced in that silicon - .. Jetall is used as a whitening agent. is welded in a nitrogen atmosphere.

Bei diesem Verfahren .entsteht in der Verbindungsnaht keine geschmolzene, d.1: artfremde Zone, sondern ein krirtalline.s und poröses Gebilde, wie es der keramische Körper selbst ist. Es hat sich überraschenderweise gezeigt, daß in der kurzen Zeit während des Schweißens aus dem beispielsweise in Form eines: Schweißdrahtes zufmefülirten Silizium-T;letall und dem als Schutz- und Reaktionsatmosphäre zum Einsatz kommenden Stickstoff sowie eventuell anwesender Abbrenngase der Kohle-, ' elektroäen neue kristalline Stoffe entstehen, welche,-die beiden züz verbindenden Teile fest zusammenhalten und die den Eigen":"cl-aften der Yrzstaliplasen in den zu verbindenden 'Teilen ähnlich sind. Da es sich bei diesen neu entstehenden kristallinen Stoffen hauptsächlich um Siliziumnitrid und Siliziumkarbid handelt, ist das erfindungsgemäße Verfahren insbesondere für dde Verbindung von Feuerfestprodukten auf der Basis dieser Stoffe wirkungsvoll. Es hat sich jedoch gezeigt, daß auch rein oxidische feuerfeste Produkte auf diese gleise miteinander verbunden oder werden können. Die in diesem Falle fremdartige Schweißnaht stört offenbar deshalb nicht, weil sich die Wärmeausdehnungskoeffizienten aller dieser Stoffe. nur sehr wenig unterscheiden.With this process, no molten, d.1: alien zone, but a krirtalline.s and porous structure, like the ceramic Body itself is. It has surprisingly been found that in the short time during welding from the, for example, in the form of a welding wire Silicon-T; lethal and used as a protective and reaction atmosphere Nitrogen as well as any burn-off gases from the coal, 'electrical new' Crystalline substances arise, which hold the two connecting parts firmly together and which are similar to the ":" cl-aften of the Yrzstaliplasen in the parts to be connected are. As it is with these newly emerging crystalline substances is mainly silicon nitride and silicon carbide, is that according to the invention Process in particular for the connection of refractory products on the basis of these Substances effective. However, it has been shown that purely oxidic refractories Products on these tracks can or can be connected to one another. The one in this The case of a foreign weld seam does not seem to bother, because the coefficient of thermal expansion of all of these substances. differ very little.

In weiterer Au@,bildunp der. Erfindung wird das #lerf,-.lbren zweckmäßig so geführt, daß der Abstand der Schweißelektroden von der Schweißstelle und der Schweiß@'ortschritt so gewählt werden, daß die Oberflächentemperatur der Schweißverbindun: zwischen 1 450o und 1 8(i00 C liegt.In further au @, educa on. Invention becomes the #lerf, -. Lbren appropriate guided so that the distance between the welding electrodes and the welding point Welding progress can be selected so that the surface temperature of the weld joint: is between 1 450o and 1 8 (100C.

Eine leichte Verunreinigung des beispielsweise in Form eines Drahtes zugeführten Silizium-Metalles schadet nicht, sondern kann sogar eine Verbesserung bzw. Beschleunigung der Kristallisation bewirken Durch die Erfindung wird somit erstmalig: ein Verfahren geschaffen, mit dem es möglich ist viele gebrochene Stücke wieder zu verbinden, so daß der bisher unvermeidbar hohe Ausschuß wesentlich: reduziert werden kann. Der technische 2ortschritt des -erfindungsgemäßen Verfahrens liegt somit auf der Hand.- Dies gilt umsomehr, als das Verfahren selbst mit den handelsüblichen Geräten durchgeführt werden-kann und nur dann, wenn eine Schutzgasvorrichtung nicht vorbanden ist, eine solche angebracht werden muß.A slight contamination of, for example, in the form of a wire added silicon metal does not harm, but can even improve it bring about or acceleration of the crystallization For the first time: a process created with which it is possible to have many broken pieces again to combine, so that the previously unavoidable high scrap is significantly: reduced can be. The technical progress of the method according to the invention is thus obvious.- This is all the more true than the procedure itself with the commercially available ones Devices can be carried out and only if a protective gas device does not is available, such a must be attached.

Als besonders vorteilhaft hat sich das erfindungsgemäße Tierfahren fizr die Herstellung komplizierter Formteile aus feuerfesten Materialien erwiesen, weil diese nunmehr in einfacher Form hergestellt und nach dem erfindungsgemäßen Verfahren zu der komplizierten Form zusammengebaut und vereinigt werden können.Driving with animals according to the invention has proven to be particularly advantageous proven for the production of complex molded parts from refractory materials, because this is now produced in a simple form and according to the invention Process can be assembled and united to the complex shape.

Claims (2)

P a t e n t a n s p r ü -c h e ------------------------------ 1. Verfahren zum Verbinden feuerfester Körper, insbesondere Siliziumkarbid- und Siliziumnitrid-Erzeugnisse, mittels des elektrischen Lichtbogens, bei dem ein Schweißmittel der Schweißstelle zugeführt wird, dadurch g e k e n n zeichnet , daß als Schweißmittel gegebenenfalls gering verunreinigtes Silizium-Metall dient und in einer Stickstoff-Atmosphäre geschweißt wird. Patent claims ------------------------------ 1. Process for joining refractory bodies, in particular silicon carbide and silicon nitride products , by means of the electric arc, in which a welding agent is supplied to the welding point, characterized in that the welding agent is optionally slightly contaminated silicon metal and is welded in a nitrogen atmosphere. 2. Tierfahren nach Anspruch 1, dadurch g e k e n n -z e i c h n e t , daß der Abstand der Schweißelektroden von der Schweißstelle und der Schweißfortschritt so gewählt werden, daß die Uberflächentemperatur der Schweißverbindung zwischen 1 450 o und 1 800o C liegt.2. Animal driving according to claim 1, characterized in that g e k e n n -z e i c h n e t that the distance of the welding electrodes from the welding point and the welding progress be chosen so that the surface temperature of the weld joint between 1 450 o and 1 800 o C.
DE19661571297 1966-03-09 1966-03-09 Method of joining refractory bodies Pending DE1571297A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA0051792 1966-03-09

Publications (1)

Publication Number Publication Date
DE1571297A1 true DE1571297A1 (en) 1970-12-03

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DE (1) DE1571297A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3518710A1 (en) * 1985-05-24 1986-11-27 Kernforschungsanlage Jülich GmbH, 5170 Jülich Process for joining silicon carbide mouldings
US4762269A (en) * 1985-05-24 1988-08-09 Kernforschungsanlage Julich Gmbh Method of joining molded silicon carbide parts
DE3820459C1 (en) * 1988-06-16 1989-11-09 Kernforschungsanlage Juelich Gmbh, 5170 Juelich, De

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3518710A1 (en) * 1985-05-24 1986-11-27 Kernforschungsanlage Jülich GmbH, 5170 Jülich Process for joining silicon carbide mouldings
US4762269A (en) * 1985-05-24 1988-08-09 Kernforschungsanlage Julich Gmbh Method of joining molded silicon carbide parts
DE3820459C1 (en) * 1988-06-16 1989-11-09 Kernforschungsanlage Juelich Gmbh, 5170 Juelich, De
US4928870A (en) * 1988-06-16 1990-05-29 Kernforschungsanlage Julich Gesellschaft Mit Beschrankter Haftung Process for joining ceramic parts with a reactive conducting material

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