DE2200665A1 - Metallic ceramic material for heating elements - - based on aluminium,titanium boride and boron nitride - Google Patents
Metallic ceramic material for heating elements - - based on aluminium,titanium boride and boron nitrideInfo
- Publication number
- DE2200665A1 DE2200665A1 DE19722200665 DE2200665A DE2200665A1 DE 2200665 A1 DE2200665 A1 DE 2200665A1 DE 19722200665 DE19722200665 DE 19722200665 DE 2200665 A DE2200665 A DE 2200665A DE 2200665 A1 DE2200665 A1 DE 2200665A1
- Authority
- DE
- Germany
- Prior art keywords
- boron nitride
- ceramic material
- aluminium
- metal
- heating elements
- 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.)
- Granted
Links
- 229910052582 BN Inorganic materials 0.000 title claims description 10
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 title claims description 10
- 229910010293 ceramic material Inorganic materials 0.000 title claims description 10
- 229910052782 aluminium Inorganic materials 0.000 title claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title description 3
- 239000010936 titanium Substances 0.000 title description 3
- 229910052719 titanium Inorganic materials 0.000 title description 3
- 239000004411 aluminium Substances 0.000 title 1
- 238000010438 heat treatment Methods 0.000 title 1
- 239000000463 material Substances 0.000 claims abstract description 24
- 229910033181 TiB2 Inorganic materials 0.000 claims abstract description 8
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000007731 hot pressing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000007858 starting material Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 5
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- JXOOCQBAIRXOGG-UHFFFAOYSA-N [B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[Al] Chemical compound [B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[Al] JXOOCQBAIRXOGG-UHFFFAOYSA-N 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped 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
- C04B35/58—Shaped 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
- C04B35/583—Shaped 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 boron nitride
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
Abstract
Description
METALLKERAMISCHES MATERIAL FÜR IN AGGRESSIVEN MEDIEN BETRIEBENE HEIZKÖRPER UND VERFAHREN ZU DESSEN HERSTELLUNG Die Erfindung betrifft<> d@@ zur Herstellung von Vakuumüberzügen durch Verdampfung von Metallon <metallkeramische Materialien,# für Heizkörpe@@) in aggressiven Medien betrieben werden sowie Verfahren zu deren Herstellung.METAL-CERAMIC MATERIAL FOR RADIATORS OPERATED IN AGGRESSIVE MEDIA AND PROCESS FOR THE PRODUCTION THEREOF The invention relates to the production of vacuum coatings by evaporation of metallon <metal-ceramic materials, # for radiators @@) are operated in aggressive media and processes for their production.
Zur Zeit verwendet man für die Herstellung von Verdampfungskörpern auf Grundlage von Titanditerid (35-10 Gew.%) und Bornitrid aufbereitete Materialien. Die aus dies en Materialien hergestellten Verdampfungskörper weisen die erforderliche elektrische Charakteristik , eine hohe Korrosionsbeständigkeit sowie eine Härte auf, die deren mechanische Bearbeitung ermöglicht. Solche Materialien werden durch Warmpressen avs feingemahlenem Ausgangsmaterial hergestellt. At the moment it is used for the production of evaporating bodies materials prepared on the basis of titanium titeride (35-10% by weight) and boron nitride. The evaporation bodies made from these materials have the required electrical characteristics, high corrosion resistance and hardness which enables their mechanical processing. Such materials are made by Hot pressing made from finely ground starting material.
ßoi der Aufbereitung solcher Materialien entstehen jedoch Schwierigkeiten, die durch die Notwendigkeit, ein Material mit einer Porosität von weniger als 5% der vorherigen Feinzerkleinerung zu erhalten, sowie auch daduroh bedingt sind, daß für das Warmpressen dieser Materialien eine hohe Temperatur von 1700-2000°C erforderlich ist. However, when processing such materials, difficulties arise due to the need to use a material with a porosity of less than 5% the previous fine comminution, as well as daduroh are conditional that hot pressing of these materials requires a high temperature of 1700-2000 ° C is.
Zweck der Erfindung ist die Beseitigung der genannten @achteile. The purpose of the invention is to eliminate the disadvantages mentioned.
Der Erfindung liegt die aufgabe zugrunde, ein metallkeramisches Material <> mit einer Zusammensetzung<für Heizkörper>sowie ein Verfahren zur Herstellung dieses Materials ZU schaffen, daß das hergestellte material bei dessen Verwendung in aggressiven Medien Tempera- 1 tur und Korrosionsbeständigkeit aufweist. The invention is based on the object of a metal-ceramic material <> with a composition <for radiators> and a method for Manufacture of this material to create that the manufactured material in its Use in aggressive media 1 temperature and corrosion resistance.
Es wird ein auf Grundlage von Titandiborid und Bornitrid aufbereitetes metallkeramisches Material für Heizkörper, <<>>vorgeschlagen. <<die in aggressiven Medien betrieben werden@>> Erfindungsgemäß enthält dieses Material auch Aluminium. It is processed on the basis of titanium diboride and boron nitride metal-ceramic material for radiators, << >> proposed. << the be operated in aggressive media @ >> According to the invention, this material contains also aluminum.
Zur Aufbereitung des metallkeramischen Materials wird ein Verfahren zum Warmpressen des Preßgutes vorgeschlagen, das Titandiborid und Bornitrid enthält. Das Ausgangspreßgut, welches 8 bis 19 Gew.% Aluminium, 35 bis 75 Gew.% Titandiborid und 57 bis 15 Gew.% Bornitrid enthält, wird bis auf eine Temperatur von 1700-1800°C erwärmt und bei dieser Temperatur gepreßt. A process is used to prepare the metal-ceramic material Proposed for hot pressing of the pressed material that contains titanium diboride and boron nitride. The starting material, which contains 8 to 19% by weight of aluminum, 35 to 75% by weight of titanium diboride and 57 to 15% by weight boron nitride is used up to a temperature of 1700-1800 ° C heated and at this Pressed temperature.
Bei der Durchführung des erfindungsgemäßen Verfahre@s zur Herstelin (:; getallkec5 r'ws Uc ~ preßgut vorher nicht feiagemahlen@ trotzdem @ag die Porosität des fertigen metallkoramischer Materials nicht über 4 bis 5%. When carrying out the method according to the invention for manufacturing (:; getallkec5 r'ws Uc ~ preßgut not previously ground @ still @ag the porosity of the finished metal koramic material does not exceed 4 to 5%.
Auf diese Weise werden gemäß der Erfindung ein metall@@r@m@se@es Material mit @@@@ @ @@ Zusammensetzung sowie auch ei@ @erf@@ren zur @@@@@@lung dieses Materials vorgeschlagen, die es gesta@@@@, die arbeitsaufwendige Feinzerkleinerung des Preßgutes vor dem Warmpressen zu vermeiden und das Warmpressen bei einer niedrigeren Temperatur@durchzuführen. In this way, according to the invention, a metal @@ r @ m @ se @ es Material with @@@@ @ @@ composition as well as ei @ @ erf @@ ren to @@@@@@ this Materials suggested that it gesta @@@@, the labor-intensive fine grinding of the material to be pressed before hot pressing and hot pressing at a lower Temperature @ to be carried out.
Das erfindungsgemäßs m@tallkera/mische Material für Heizkörper, die in aggressiven Medien bet@@@@on werden, enthält im Ausgangspreßgut 35-75 Gew.% Titand@@ @@d, 57-15 Gew.% Bornitrid und' 8 - 10 Gew.% Aluminium. The inventive metalkera / mix material for radiators that in aggressive media, contains 35-75% by weight of titanium in the initial pressed material @@ @@ d, 57-15% by weight boron nitride and 8-10% by weight aluminum.
Bei der Erhitzung des Materials beim Warmpressen bis auteine Temperatur von 1700-1800°C reagiert das Aluminium mit@Titandiborid und Bornitrid und geht zumindest teilweise in Aluminiumnitrid und - borid über. Diese Schlußfolgerung wurde auf Grundlage von Versuchsangaben gezogen. When the material is heated up to a temperature during hot pressing from 1700-1800 ° C the aluminum reacts with @ titanium diboride and boron nitride and at least works partly in aluminum nitride and aluminum boride. This conclusion was based on drawn from experimental data.
Die Bildung von Aluminiumnitrid und Aluminiumborid beim Warmpressen erfolgt vor allem an der Oberfläche der Körner, wodurch der Binterungsprozeß aktiviert und eine Senkung der Temperatur des Pressens ermöglicht wird. Die Bildung von Aluminiumnitrid erfolgt unter Vergrößerung des Volugens, was zur Ausfüllung von Poren mit Aluminiumnitrid und somit zu einer Verminderung der Porosität führt, obwohl die Ausgangskomponenten in grobkörniger Form verwendet wurden. The formation of aluminum nitride and aluminum boride during hot pressing takes place mainly on the surface of the grains, which activates the sintering process and a lowering of the pressing temperature is enabled. The formation of Aluminum nitride takes place with enlargement of the volume, which leads to the filling of pores with aluminum nitride and thus leads to a reduction in porosity, although the starting components were used in coarse-grained form.
Durch die Verminderung der Poroeität wird die Berührungsfläche des metallkeramischen Materials mit dem aggressiven Medium vermindert und auf diese Weise die Korrosionsbeständigkeit dieses Materials erhöht. By reducing the porosity, the contact area of the metal-ceramic material with the aggressive medium and reduced to this Way increases the corrosion resistance of this material.
Eine Erhöhung der Korrosionsbeständigkeit des Materials wird außerdem dadurch erzielt, daß der Prozeß in Gegenwart von Aluminiumnitrid vorgenommen wird, das eine hohe Beständigkeit gegen die korrodierende Einwirkung schmelzflüssiger Metalle und Metalldämpfe aufweist. Das beim Warmpressen der Ausgangskomponenten entstehende Aluminiumborid ist ein @halbleiter und stabilisiert den elektrischen Widerstand des metallkeramischen Materials.An increase in the corrosion resistance of the material is also achieved in that the process is carried out in the presence of aluminum nitride, which has a high resistance to the corrosive effects of molten metals and metal vapors. The aluminum boride formed during hot pressing of the starting components is a @semiconductor and stabilizes the electrical resistance of the metal-ceramic material.
Die im Ergebnis der Versuchsarbeiten erhaltenen Angaben über die Abhängigkeit der physikalisch- mechanischen Eigenschaften des metallkeramischen Materials von der Zusammensetzung des Preßgutes, aus welchem dieses Material hergestellt worden ist, werden in dbr nachstehenden Tabelle angeführt. The information obtained as a result of the experimental work on the Dependence of the physical-mechanical properties of the metal-ceramic Material on the composition of the pressed material from which this material is made are listed in the table below.
Zusammen- Spezifischer Widerzetzung in Gew.% Dichte, Ponosität, @tand Ohm / cm BN TiB2 Al g/cm3 % 20°C 16@0°C 45 45,8 9,2 2,64 14,6 1,62.1@-2 2.0.10-2 38,7 52,6 8,7 2,81 11,2 4,@.10-3 7,2.10-3 34,7 56,8 8,5 3,28 2,85 1,33.10-3 1,7.10-3 Composition - Specific resistance in wt.% Density, ponosity, @tand Ohm / cm BN TiB2 Al g / cm3% 20 ° C 16 @ 0 ° C 45 45.8 9.2 2.64 14.6 1.62.1 @ -2 2.0.10-2 38.7 52.6 8.7 2.81 11.2 4, @. 10-3 7.2.10-3 34.7 56.8 8.5 3.28 2.85 1.33.10-3 1.7.10 -3
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19722200665 DE2200665C3 (en) | 1972-01-07 | Process for the production of a metal-ceramic material for radiators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19722200665 DE2200665C3 (en) | 1972-01-07 | Process for the production of a metal-ceramic material for radiators |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2200665A1 true DE2200665A1 (en) | 1973-07-19 |
| DE2200665B2 DE2200665B2 (en) | 1975-11-27 |
| DE2200665C3 DE2200665C3 (en) | 1976-07-01 |
Family
ID=
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2536367A1 (en) * | 1974-08-15 | 1976-02-26 | Denki Kagaku Kogyo Kk | CORROSION RESISTANT HIGH TEMPERATURE MOLDING PRODUCT |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2536367A1 (en) * | 1974-08-15 | 1976-02-26 | Denki Kagaku Kogyo Kk | CORROSION RESISTANT HIGH TEMPERATURE MOLDING PRODUCT |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2200665B2 (en) | 1975-11-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C3 | Grant after two publication steps (3rd publication) |