CS207968B1 - Method of covering the elements of the high melting point before covering the same by the pyrolitic graphite - Google Patents
Method of covering the elements of the high melting point before covering the same by the pyrolitic graphite Download PDFInfo
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- CS207968B1 CS207968B1 CS711678A CS711678A CS207968B1 CS 207968 B1 CS207968 B1 CS 207968B1 CS 711678 A CS711678 A CS 711678A CS 711678 A CS711678 A CS 711678A CS 207968 B1 CS207968 B1 CS 207968B1
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- covering
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Description
Vynález se týká způsobu pokryvu součástí o vysokém bodu tání před jejich pokryvem pyrolitickým grafitem.BACKGROUND OF THE INVENTION The present invention relates to a method for covering high melting point components prior to their coating with pyrolysis graphite.
Pyrolitický grafit se nanáší ve formě vrstvy vysokoteplotním rozkladem uhlovodíků na žhavém kovovém či nekovovém podkladu — substrátu. Charakter pokryvu mimo výrobní podmínky a jakosti povrchu substrátu je závislý také na chemickém a krysalografickém složení substrátu’. Tak se na některém tvoří velmi dobře, na jiném naopak vzniká obtížně, nerovnoměrně nebo se špatnou soudržností, zvláště když se jedná o substrát značně členitý nebo složený z různých materiálů.Pyrolytic graphite is applied in the form of a layer by high-temperature decomposition of hydrocarbons on a hot metallic or non-metallic substrate - substrate. The nature of the coating outside the production conditions and the surface quality of the substrate is also dependent on the chemical and crystallographic composition of the substrate. In this way it is very well formed on some, but on the other hand it is difficult, uneven or poorly cohesive, especially when the substrate is very rugged or composed of different materials.
Uvedený nedostatek je odstraněn způsobem pokryvu součástí o vysokém bodu tání pyrolitickým grafitem, jehož podstata spočívá v tom, že součást se předem opatří vrstvou některého z kovů ze skupiny IV b, V b a VI periodické soustavy prvků. Součástka z jakéhokoliv materiálu o vysokém bodu tání, určená k pokrytí pyrolytickým grafitem, se podle vynálezu před pokryvem opatří vrstvou některého kovu IV b, V b, nebo VI b skupiny soustavy prvků, například titanu, zirkonia, molybdenu, tantalu nebo wolframu. Následný po- kryv pyrolítickým grafitem je vždy pravidelný, definovatelný s dobrou soudržností. Podstata spočívá v tvorbě karbidů kovů těchto skupin, které tvoří mezivrstvu mezi substrátem a vrstvou pyrolitického grafitu.This drawback is eliminated by the method of covering the high melting point components with pyrolytic graphite, wherein the component is pre-coated with one of the Group IVb, Vb and VI metals of the Periodic Table of the Elements. According to the invention, a component of any high melting point material intended to be covered with pyrolytic graphite is coated with a layer of some metal IV b, V b, or VI b of a group of elements, for example titanium, zirconium, molybdenum, tantalum or tungsten. The subsequent pyrolithic graphite coating is always regular, definable with good cohesion. The essence lies in the formation of metal carbides of these groups, which form an interlayer between the substrate and the pyrolytic graphite layer.
Kovy těchto skupin je možno nanést na substrát některou ze známých metod, například kataforeticky, galvanicky a podobně. Je možno je aplikovat i na různé jiné mezivrstvy, například vnikání uhlovodíku do substrátu. Postupem pokryvu podle vynálezu se získá rovnoměrný a definovatelný povlak pyrolitického grafitu s velmi dobrou soudržností s mezivrstvou a podkladem na kovových i nekovových teplotně odolných součástkách i značně složitých a členitých, složených z jednoho nebo více rozdílných materiálů.The metals of these groups can be applied to the substrate by any of the known methods, such as cataphoretic, galvanic, and the like. They can also be applied to various other interlayers, such as the introduction of hydrocarbon into the substrate. By the coating process of the invention, a uniform and definable coating of pyrolytic graphite with very good interlayer and substrate adhesion is obtained on both metal and non-metallic heat resistant components, even highly complex and rugged, composed of one or more different materials.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS711678A CS207968B1 (en) | 1978-10-31 | 1978-10-31 | Method of covering the elements of the high melting point before covering the same by the pyrolitic graphite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS711678A CS207968B1 (en) | 1978-10-31 | 1978-10-31 | Method of covering the elements of the high melting point before covering the same by the pyrolitic graphite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CS207968B1 true CS207968B1 (en) | 1981-08-31 |
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ID=5419702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS711678A CS207968B1 (en) | 1978-10-31 | 1978-10-31 | Method of covering the elements of the high melting point before covering the same by the pyrolitic graphite |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS207968B1 (en) |
-
1978
- 1978-10-31 CS CS711678A patent/CS207968B1/en unknown
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