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Rotary anode and method for producing same

A technology of rotating anodes and substrates, applied in the directions of X-ray tube electrodes, X-ray tube targets and converters, X-ray tubes, etc.

Inactive Publication Date: 2015-02-11
SIEMENS AG
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] But for these materials it has so far been shown that the tungsten combustion zone of the rotating anode is problematic to bond reliably to the substrate

Method used

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  • Rotary anode and method for producing same

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Embodiment Construction

[0021] The rotary anode for an X-ray tube, designated in its entirety by 10 and only partially shown in the figures, comprises a base body 12 made of ceramic and a combustion zone 14 made of tungsten, which emits X-rays when irradiated by electrons radiation.

[0022] Due to the higher energy density in the operation of new X-ray tubes, the substrate 12 requires a material that is both resistant to high temperatures and has a sufficiently high mechanical strength at high temperatures so that a rotational frequency of 300 to 400 Hz can be maintained. A suitable class of materials satisfying these conditions are ceramics composed of silicon carbide or silicon carbide / diboride composites.

[0023] In order to improve the fixation of the combustion zone 14 on the base body made of this material, an intermediate layer 16 is formed between the combustion zone 14 and the base body 12 during the production of the rotary anode 10 , which intermediate layer 16 is made of high-temperatur...

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Abstract

The invention relates to a method for producing a rotary anode (10) for an x-ray tube, wherein a main part (12) is made of a ceramic based on silicon carbide and is provided with a tungsten focal track (14). An intermediate layer (16) is produced between the tungsten focal track (14) and the main part (12), said intermediate layer comprising at least one tungsten silicide and / or tungsten carbide.

Description

technical field [0001] The invention relates to a method for producing a rotary anode with a silicon carbide-based ceramic substrate and a rotary anode according to the preamble of claim 9 . Background technique [0002] X-ray tubes, which are used, for example, in medical X-ray devices comprise a cathode from which electrons are accelerated towards a rotating rotating anode. The rotating anode comprises a base body on which a so-called combustion zone of tungsten or a tungsten-rhenium alloy is provided, which forms the actual anode. If the electrons are sufficiently accelerated to the combustion zone and decelerated in the combustion zone material, electromagnetic radiation (X-ray radiation) with characteristic wavelengths is generated. [0003] Due to the rotation of the rotary anode, the thermal load here should be kept as low as possible. Since, precisely for X-ray tomography, increasingly higher radiation intensities are expected, the focus of the electrons on the com...

Claims

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Application Information

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IPC IPC(8): H01J35/10
CPCH01J2235/083H01J35/108
Inventor J.弗罗伊登伯格S.兰彭舍夫G.K.法姆S.沃尔特
Owner SIEMENS AG
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