Schwarzkopf Development Corporation

Schwarzkopf Technologies Corporation

Karlheinz Kailer

Peter Rodhammer

A composite body for rotary anodes of X-ray tubes is made from graphite, a carbide-forming, high-melting metal component and a multi-layered intermediate layer. The first layer of the intermediate layer closest to the graphite is made up of a metal or an alloy thereof which does not form a carbide. Applied over the first layer are at least two double layers. Each double layer has one individual layer of at least one carbide-forming metal or at least one carbide thereof, and a second individual layer of a metal or an alloy thereof which does not form a carbide. Preferred carbide-forming metals are tungsten, tantalum, hafnium and niobium. Preferred metals which do not form carbides are rhenium and platinum. In a preferred embodiment, the composite body is a rotary anode for X-ray tubes, with a basic body made of graphite and a burning track made of tungsten or a tungsten-rhenium alloy applied directly to the intermediate layer.

Composite body made of graphite and high-melting metal

Rotary graphite anode for use in X-ray tubes comprising a basic body consisting of graphite and a high melting alloy and having a tungsten alloy focal track. The basic body is secured to a graphite substrate. The graphite substrate is coated by a layer of carbon formed by decomposition of hydrocarbon gases in an activated d.c. voltage discharge.

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Breitenwang, Austria

Karlheinz Kailer