Santrade, Ltd

Klas G Stjernberg

Anders G Thelin

Herbert Schachner

Benno Lux

Heinz Tippmann

The present invention relates to a compound body consisting of a substrate with a surface coating of one or more dense, finegrained diamond layers, where the diamond grains are directly bonded to each other. Extreme hardness makes the compound body suitable for wear parts- and tools applications. Very good heat conductivity and an extremely high electrical isolation resistance makes the compound body extremely useful to lead away heat in electronic components.

Body with superhard coating

A chemical vapor deposition method for the production of a composite body with one or more polycrystalline diamond layers, essentially free of intercrystalline binder phase, on a substrate of one of: (a) metalbonded hardmaterial compound; (b) ceramic material; or (c) a metal or an alloy, whereby the heated substrate is contacted with a gaseous mixture of hydrocarbon or hydrogen, which mixture has been activated by passing it over a tantalum heater heated to a temperature of 1500.degree.-2500.degree. C. Also disclosed is the use of the compound body in tools subjected to mechanical operations.

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Huddinge, Sweden

Klas G Stjernberg