DE865848C - Process for metallizing objects by diffusion - Google Patents

Process for metallizing objects by diffusion

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Publication number
DE865848C
DE865848C DEN1541A DEN0001541A DE865848C DE 865848 C DE865848 C DE 865848C DE N1541 A DEN1541 A DE N1541A DE N0001541 A DEN0001541 A DE N0001541A DE 865848 C DE865848 C DE 865848C
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DE
Germany
Prior art keywords
diffusion
treated
reaction gases
reaction
objects
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.)
Expired
Application number
DEN1541A
Other languages
German (de)
Inventor
Rudolf Dipl-Ing Nowak
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DEN1541A priority Critical patent/DE865848C/en
Application granted granted Critical
Publication of DE865848C publication Critical patent/DE865848C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/06—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Vapour Deposition (AREA)

Description

Verfahren zum Metallisieren von Gegenständen durch Diffusion Es ist bekannt, daß verschiedene Metallhalogenide in festem, flüssigem oder gasförmigem Zustand an der Oberfläche entsprechend temperierter metallischer Gegenstände eine chemische Umsetzung hervorrufen.Process for metallizing objects by diffusion It is known that various metal halides in solid, liquid or gaseous Condition on the surface of correspondingly tempered metallic objects cause chemical conversion.

Weiter ist auch bekannt, Metallhalogenide, wie Siliciurhtetrachlorid, Zinntetrachlorid u. dgl., im gasförmigen Zustand in Gegenwart von Wasserstoff auf die zu behandelnde Oberfläche zwecks Diffusion einwirken zu lassen.It is also known to use metal halides, such as Siliciurhtetrachlorid, Tin tetrachloride and the like in the gaseous state in the presence of hydrogen to allow the surface to be treated to act for the purpose of diffusion.

Wie festgestellt wurde, genügen die nach diesen Verfahren hergestellten Überzüge in keiner Weise den technologischen Ansprüchen. Sie sind beispielsweise zuwenig duktil, wie der aus Siliciumtetrachlorid gewonnene ° Silicium- oder Ferrosiliciumüberzug, d. h. sie sind zuwenig widerstandsfähig gegen Verformungseinflüsse, wie z. B. Biegen oder Tiefziehen, oder sie sind zu unregelmäßig, um beispielsweise ein störungsfreies elektrisches Schweißen zu gewährleisten. Die Duktilität der Metalloberfläche nach der Diffusionsbehandlung wird aber nur erreicht, "venn. die Arbeitsbedingungen so gestaltet werden, daß ein allmählicher Anstieg der eindiffundierten: Komponente von innen nach außen gewährleistet ist.It has been found that those produced by these methods are sufficient Coatings in no way meet the technological requirements. You are for example not ductile enough, like the ° silicon or ferrosilicon coating obtained from silicon tetrachloride, d. H. they are not sufficiently resistant to deformation effects such. B. Bending or deep drawing, or they are too irregular to produce, for example, a trouble-free to ensure electrical welding. The ductility of the metal surface according to diffusion treatment is only achieved if the working conditions are so be designed so that a gradual increase in the diffused: component is guaranteed from the inside out.

Erfindungsgemäß wird dies erreicht, wenn das in bekannter Weise mit Wasserstoff verdünnte Metallhalogenid mit entsprechend hoher Geschwindigkeit in einem Kreislauf bei der Reaktionstemperatur auf den zu behandelnden Gegenstand zur Einwirkung gebracht wird, wobei die Betriebsbedingungen so gehalten werden, daß das Gasmengenverhältnis laufend den Anforderungen entsprechend geregelt und das anfallende gasförmige Reaktionsprodukt im Kreisprozeß regeneriert wird.According to the invention, this is achieved when this is done in a known manner Hydrogen dilutes metal halide at a correspondingly high rate in a cycle at the reaction temperature on the object to be treated Action is brought, the operating conditions are maintained so that the gas quantity ratio is continuously regulated according to the requirements and that resulting gaseous reaction product is regenerated in the cycle.

Hierbei diffundiert unter Vermeidung der Bildung spröder Schichten die diffundierende Komponente allmählich tiefer in die Oberfläche hinein, so daß für eine gute Verankerung der Schutzschicht Sorge getragen istR Hinzu kommt, daß die Wirtschaftlichkeit des Verfahrens durch den Kreislaufprozeß gegenüber den bisher bekannten, Verfahren , erheblich gesteigert wird.This diffuses while avoiding the formation of brittle layers the diffusing component gradually deeper into the surface, so that good anchoring of the protective layer is ensured the economy of the process through the circulatory process compared to the previously known method, is increased significantly.

Die vorteilhafte Wirkung des Kreislaufes der Reaktionsgase wird ferner unterstützt durch An.-wendung des Gegenstromprinzips. Dies geschieht in der Weise, daß das zu behandelnde Gut im Durchlauf durch den Reaktionsraum der Bewegungsrichtung der Reaktionsgase entgegen bewegt wird. Auch hierdurch wird ein allmählicher Anstieg des Prozentgehaltes der eindiffundierenden Komponente gefördert.The beneficial effect of the circuit of the reaction gases is furthermore supported by the use of the countercurrent principle. This is done in the way that the material to be treated as it passes through the reaction space in the direction of movement the reaction gases is moved in the opposite direction. This also causes a gradual increase the percentage of the diffusing component promoted.

Claims (2)

PATENTANSPRÜCHE- i. Verfahren zum Metallisieren von Gegenständen durch Diffusion mittels gasförmiger Metallhalogenide, wie Siliciumtetrachlorid, Zinntetrachlorid u. dgl., in einer Wasserstoffatmosphäre, dadurch gekennzeichnet, daß die Reaktionsgase im Kreislauf geführt und die Betriebsbedingungen so gehalten werden, da.ß das Gasmengenverhältnis laufend den Anfoyderungen entsprechend geregelt und das anfallende Reaktionsprodukt im Kreisprozeß regeneriert wird. PATENT CLAIMS- i. Process for metallizing objects by diffusion by means of gaseous metal halides, such as silicon tetrachloride, tin tetrachloride and the like, in a hydrogen atmosphere, characterized in that the reaction gases are circulated and the operating conditions are maintained so that the gas quantity ratio is continuously regulated according to the requirements and the resulting reaction product is regenerated in the cycle. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß das zu behandelnde Gut im Durchlaufverfahren der Strömungsrichtung der Reaktionsgase entgegen bewegt wird. 3,. Verfahren nach Anspruch i und 2"dadurch. gekennzeichnet, daß die Reaktionsgase vor der Berührung mit? dem zu behandelndem Gut auf Reaktionstemperatur gebracht werden.2. Procedure according to claim i, characterized in that the material to be treated in a continuous process is moved against the direction of flow of the reaction gases. 3 ,. Procedure according to Claim i and 2 "characterized in that the reaction gases prior to contact with? the material to be treated are brought to the reaction temperature.
DEN1541A 1950-07-21 1950-07-21 Process for metallizing objects by diffusion Expired DE865848C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEN1541A DE865848C (en) 1950-07-21 1950-07-21 Process for metallizing objects by diffusion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN1541A DE865848C (en) 1950-07-21 1950-07-21 Process for metallizing objects by diffusion

Publications (1)

Publication Number Publication Date
DE865848C true DE865848C (en) 1953-02-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEN1541A Expired DE865848C (en) 1950-07-21 1950-07-21 Process for metallizing objects by diffusion

Country Status (1)

Country Link
DE (1) DE865848C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1096708B (en) * 1954-08-07 1961-01-05 Rudolf Kellermann Dipl Ing Process for the production of metal coatings by gas plating with a volatile sub-compound of the coating metal
DE3338852A1 (en) * 1982-12-11 1984-06-14 Maschf Augsburg Nuernberg Ag METHOD AND DEVICE FOR COATING WORKPIECES BY MEANS OF CHEMICAL, HETEROGENIC GAS PHASE REACTION

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1096708B (en) * 1954-08-07 1961-01-05 Rudolf Kellermann Dipl Ing Process for the production of metal coatings by gas plating with a volatile sub-compound of the coating metal
DE3338852A1 (en) * 1982-12-11 1984-06-14 Maschf Augsburg Nuernberg Ag METHOD AND DEVICE FOR COATING WORKPIECES BY MEANS OF CHEMICAL, HETEROGENIC GAS PHASE REACTION

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