Abstract
An X-ray tube anticathode, intended to be used, for example,
in medical instruments, such as scanners, includes a support
made of a ceramic/ceramic composite material and a refractory
metal film directly in contact with this support. The use of
a ceramic/ceramic composite makes it possible to rotate the
anticathode at an extremely high speed. In addition, this
composite is selected 1) so that its coefficient of expansion
is as compatible as possible with that of the refractory
metal, which favors adhesion between the support and the
active film, and 2) so that the phenomenon of the diffusion
of carbon atoms is suppressed or minimized at the active film
under the effect of the rise of temperature by not using a
graphite material, which renders it ineffective in using an
anticarbonizing film, such as rhenium, indium, SiC, etc.
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