Composite body made of graphite and high-melting metal
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United States of America Patent
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Jun 16, 1992
Grant Date -
N/A
app pub date -
May 25, 1990
filing date -
May 26, 1989
priority date (Note) -
Expired
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Abstract
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.
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