EP0236241A1 - Support for rotating the anti-cathode of an X-ray tube - Google Patents

Support for rotating the anti-cathode of an X-ray tube Download PDF

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Publication number
EP0236241A1
EP0236241A1 EP87420026A EP87420026A EP0236241A1 EP 0236241 A1 EP0236241 A1 EP 0236241A1 EP 87420026 A EP87420026 A EP 87420026A EP 87420026 A EP87420026 A EP 87420026A EP 0236241 A1 EP0236241 A1 EP 0236241A1
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European Patent Office
Prior art keywords
carbon
support
parts
support according
graphite
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Granted
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EP87420026A
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German (de)
French (fr)
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EP0236241B1 (en
Inventor
Jacques Fourre
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Mersen SA
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Carbone Lorraine SA
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Priority to AT87420026T priority Critical patent/ATE49323T1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
    • H01J35/08—Anodes; Anti cathodes
    • H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
    • H01J35/108—Substrates for and bonding of emissive target, e.g. composite structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2235/00—X-ray tubes
    • H01J2235/08—Targets (anodes) and X-ray converters
    • H01J2235/083—Bonding or fixing with the support or substrate
    • H01J2235/084—Target-substrate interlayers or structures, e.g. to control or prevent diffusion or improve adhesion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12625—Free carbon containing component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
    • Y10T428/12826—Group VIB metal-base component
    • Y10T428/1284—W-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer

Definitions

  • the present invention relates to a support for a rotating anticathode of X-ray tubes, anticathode of the type comprising a disc consisting of a support of carbonaceous material on which is fixed or deposited a layer of refractory metal such as tungsten.
  • the invention relates more particularly to a support for anticathode rotating at high speed (20,000 revolutions / minute and beyond).
  • the carbon material used for the support is chosen from polycrystalline graphites whose expansion coefficient is compatible with that of the refractory metal which is fixed (for example by brazing) or deposited (for example in vapor phase) on the support .
  • carbon fiber / carbon matrix composites have a much greater mechanical resistance than the aforementioned polycrystalline graphites. We could therefore consider using them as a support, their mechanical resistance preventing the disc from bursting under the effect of centrifugal force. However, their coefficient of expansion is incompatible with that of the refractory metals generally used.
  • the main object of the invention is to obtain a support having both thermal characteristics compatible with those of the chosen refractory metal, and very good mechanical resistance.
  • This object is achieved according to the invention which consists of a support made of carbonaceous material intended to receive a layer of refractory metal for rotating anticathode of X-ray tubes, support characterized in that it consists of two integral parts one of the other, one being of carbon / carbon composite, the other of polycrystalline graphite, the latter being intended to receive said refractory metal.
  • a thermal contact is ensured between them by any suitable process: brazing, carbon infiltration in the vapor phase, insertion of metal or graphite powder, flexible graphite sheet such as a PAPYEX sheet. (trademark registered by the applicant) etc ...
  • the composite part surrounds the polycrystalline graphite part like a belt.
  • the support can be obtained by shrinking.
  • the carbon / carbon composites are generally chosen from those having a fabric or felt substrate with a fiber density greater than 0.5 and the following characteristics:
  • Figures 1, 2, 3, 4 and 5 show in section, for information and not limitation, montages of anticathodes comprising a support according to the invention.
  • the assembly comprises an anticathode 1 fixed to a rod 2.
  • the support of the anticathode consists of a part in carbon / carbon composite 3 juxtaposed with a part in polycrystalline graphite 4.
  • the refractory metal 5 is fixed on the latter.
  • a solder 6, for example made of titanium alloy, makes the two parts integral and at the same time ensures thermal contact between them. Alternatively, this solder can be replaced by carbon vapor infiltration.
  • the assembly comprises an anticathode 1 fixed to a rod 2.
  • the support of the anticathode consists of a part in carbon / carbon composite 3 mechanically secured by a recess 7 to a part in polycrystalline graphite 4.
  • the refractory metal 5 is fixed on the latter.
  • the thermal contact between the two parts is provided by a solder, or a powdered metal such as zirconium for example, or powdered graphite, etc. (item 8).
  • the assembly comprises an anticathode 1 fixed to a rod 2.
  • the support of the anticathode consists of a part made of carbon / carbon composite 3 having the shape of a bowl in which the graphite part is pierced polycrystalline 4.
  • the refractory metal 5 is fixed on the latter.
  • the thermal contact between the two parts is ensured by a solder or a powdered metal, or powdered graphite, or by a flexible graphite sheet (item 8).
  • the assembly comprises an anticathode 1 fixed to a rod 2.
  • the support of the anticathode consists of a carbon / carbon composite part 3 into which an annular polycrystalline graphite bowl 4 is embedded.
  • refractory metal 5, itself of annular shape, is embedded in the ring 4.
  • the assembly comprises an anticathode 1 fixed to a rod 2.
  • the support of the anticathode consists of a part made of carbon / carbon composite 3 surrounding a flat disc made of polycrystalline graphite 4.
  • the refractory metal 5 is fixed on this last.
  • the joining of these two parts can be done by shrinking.
  • the thickness of the polycrystalline graphite part carrying the refractory metal is minimum and the thickness of the carbon / carbon composite part is maximum .
  • thicknesses of polycrystalline graphite of the order of 2 to 8 mm there are thicknesses of carbon / carbon composite of the order of 10 to 20 mm.
  • the thickness of the refractory metal generally varies depending on whether it is fixed by brazing or deposited by chemical vapor deposition. In the first case, it is of the order of 3 to 8 mm, in the second of 0.4 to 1 mm.
  • a series of supports for anticathodes are produced as shown in FIG. 3. Each support has a diameter of 120 mm.
  • the maximum thickness of the polycrystalline graphite part is 8 mm and the thickness of the carbon / carbon composite part is 15 mm.
  • the applicant's grade 1116 PT polycrystalline graphite has the following characteristics:
  • the carbon / carbon composite is an AEROLOR (trademark registered by the applicant), the AEROLOR 22 which has the following characteristics:
  • the polycrystalline graphite part of half of the supports is coated by chemical vapor deposition with a layer of tungsten 1.0 mm thick.
  • the supports, coated or not, are subjected to a burst test and the results obtained are compared to those obtained with conventional supports in polycrystalline graphite only, coated or not with the same thickness of tungsten.

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  • Ceramic Products (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Laminated Bodies (AREA)
  • X-Ray Techniques (AREA)
  • Elimination Of Static Electricity (AREA)
  • Walking Sticks, Umbrellas, And Fans (AREA)
  • Earth Drilling (AREA)
  • Physical Vapour Deposition (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Supports For Pipes And Cables (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

The present invention concerns a support of carbonaceous material for a rotary target of X-ray tubes. The support is formed of two parts which are fixed with respect to each other, one part being of a carbon/carbon composite which provides mechanical strength and the other part being of polycrystalline graphite for receiving a refractory metal, by virtue of its coefficient of expansion. A thermal contact is provided between the two parts. The invention is especially applicable to targets of X-ray tubes which rotate at a high speed, 20,000 RPM and above.

Description

La présente invention concerne un support pour anticathode tournante de tubes à rayons X, anticathode du type comprenant un disque constitué d'un support en matériau carboné sur lequel est fixée ou déposée une couche de métal réfractaire tel que du tungstène. L'invention concerne plus particulièrement un support pour anticathode tournant à grande vitesse (20 000 tours/minute et au-delà).The present invention relates to a support for a rotating anticathode of X-ray tubes, anticathode of the type comprising a disc consisting of a support of carbonaceous material on which is fixed or deposited a layer of refractory metal such as tungsten. The invention relates more particularly to a support for anticathode rotating at high speed (20,000 revolutions / minute and beyond).

Le plus souvent, le matériau carboné utilisé pour le support est choisi parmi les graphites polycristallins dont le coefficient de dilatation est compatible avec celui du métal réfractaire qui est fixé (par exemple par brasure) ou déposé (par exemple en phase vapeur) sur le support.Most often, the carbon material used for the support is chosen from polycrystalline graphites whose expansion coefficient is compatible with that of the refractory metal which is fixed (for example by brazing) or deposited (for example in vapor phase) on the support .

L'inconvénient majeur de ces graphites polycristallins est de ne pas avoir une résistance mécanique suffisante dès que la vitesse de l'anticathode devient considérable, par exemple 20 000 tours/mn.The major drawback of these polycrystalline graphites is that they do not have sufficient mechanical strength as soon as the speed of the anticathode becomes considerable, for example 20,000 rpm.

Il est par ailleurs connu que les composites fibres de carbone/matrice carbone (désignés ci-après par composites carbone/carbone) ont une résistance mécanique beaucoup plus grande que les graphites polycristallins précités. On pourrait donc envisager de les utiliser comme support, leur résistance mécanique empêchant le disque d'éclater sous l'effet de la force centrifuge. Toutefois, leur coefficient de dilatation est incompatible avec celui des métaux réfractaires généralement utilisés.It is moreover known that the carbon fiber / carbon matrix composites (hereinafter referred to as carbon / carbon composites) have a much greater mechanical resistance than the aforementioned polycrystalline graphites. We could therefore consider using them as a support, their mechanical resistance preventing the disc from bursting under the effect of centrifugal force. However, their coefficient of expansion is incompatible with that of the refractory metals generally used.

Le but principal de l'invention est d'obtenir un support présentant à la fois des caractéristiques thermiques compatibles avec celles du métal réfractaire choisi, et une très bonne résistance mécanique.The main object of the invention is to obtain a support having both thermal characteristics compatible with those of the chosen refractory metal, and very good mechanical resistance.

Ce but est atteint selon l'invention qui consiste en un support en matériau carboné destiné à recevoir une couche de métal réfractaire pour anticathode tournante de tubes à rayons X, support caractérisé en ce qu'il est constitué de deux parties solidaires l'une de l'autre, l'une étant en composite carbone/carbone, l'autre en graphite polycristallin, cette dernière étant destinée à recevoir ledit métal réfractaire.This object is achieved according to the invention which consists of a support made of carbonaceous material intended to receive a layer of refractory metal for rotating anticathode of X-ray tubes, support characterized in that it consists of two integral parts one of the other, one being of carbon / carbon composite, the other of polycrystalline graphite, the latter being intended to receive said refractory metal.

Ces deux parties peuvent se trouver l'une sous l'autre, en relation superposée, ou l'une entourant l'autre.These two parts can be found one under the other, in a superimposed relationship, or one surrounding the other.

Dans le premier cas, les deux parties peuvent être :

  • - soit juxtaposées et rendues mécaniquement solidaires par tout procédé de liaison convenable tel que brasure, infiltration de carbone en phase vapeur,
  • - soit imbriquées l'une dans l'autre par embrèvement ou encastrement, ce qui les rend mécaniquement solidaires.
In the first case, the two parties can be:
  • - either juxtaposed and made mechanically integral by any suitable bonding process such as brazing, carbon infiltration in the vapor phase,
  • - or nested one inside the other by recess or embedding, which makes them mechanically integral.

Un contact thermique est assuré entre elles par tout procédé convenable: brasure, infiltration de carbone en phase vapeur, insertion de métal ou de graphite en poudre, feuille de graphite souple telle qu'une feuille de PAPYEX. (marque déposée par la demanderesse) etc...A thermal contact is ensured between them by any suitable process: brazing, carbon infiltration in the vapor phase, insertion of metal or graphite powder, flexible graphite sheet such as a PAPYEX sheet. (trademark registered by the applicant) etc ...

Dans le second cas, la partie en composite entoure comme une ceinture la partie en graphite polycristallin. Le support peut être obtenu par frettage.In the second case, the composite part surrounds the polycrystalline graphite part like a belt. The support can be obtained by shrinking.

Les graphites polycristallins sont en général choisis parmi ceux ayant les caractéristiques suivantes :

  • - densité > 1,8
  • - résistance à la flexion 7 40 MPa
  • - coefficient de dilatation entre la température ambiante et 1000°C : 4 à 6.106/°C.
Polycrystalline graphites are generally chosen from those having the following characteristics:
  • - density> 1.8
  • - flexural strength 7 40 MPa
  • - coefficient of expansion between room temperature and 1000 ° C: 4 to 6.10 6 / ° C.

Les composites carbone/carbone sont en général choisis parmi ceux ayant un substrat en tissu ou en feutre avec une densité de fibres supérieure à 0,5 et les caractéristiques suivantes :The carbon / carbon composites are generally chosen from those having a fabric or felt substrate with a fiber density greater than 0.5 and the following characteristics:

  • - densité > 1,7- density> 1.7
  • - résistance à la flexion > 150 MPa- flexural strength> 150 MPa
  • - coefficient de dilatation entre la température ambiante et 1000°C : 0,5 à 2.10-6/°C.- coefficient of expansion between room temperature and 1000 ° C: 0.5 to 2.10 -6 / ° C.

Les figures 1, 2, 3, 4 et 5 montrent en coupe, à titre indicatif et non limitatif, des montages d'anticathodes comportant un support selon l'invention.Figures 1, 2, 3, 4 and 5 show in section, for information and not limitation, montages of anticathodes comprising a support according to the invention.

. Sur la figure 1, le montage comprend une anticathode 1 fixée à une tige 2. Le support de l'anticathode est constitué d'une partie en composite carbone/carbone 3 juxtaposée à une partie en graphite polycristallin 4. Le métal réfractaire 5 est fixé sur cette dernière. Une brasure 6, par exemple en alliage de titane, rend les deux parties solidaires et assure en même temps le contact thermique entre elles. En variante, cette brasure peut être remplacée par une infiltration de carbone en phase vapeur.. In FIG. 1, the assembly comprises an anticathode 1 fixed to a rod 2. The support of the anticathode consists of a part in carbon / carbon composite 3 juxtaposed with a part in polycrystalline graphite 4. The refractory metal 5 is fixed on the latter. A solder 6, for example made of titanium alloy, makes the two parts integral and at the same time ensures thermal contact between them. Alternatively, this solder can be replaced by carbon vapor infiltration.

. Sur la figure 2, le montage comprend une anticathode 1 fixée à une tige 2. Le support de l'anticathode est constitué d'une partie en composite carbone/carbone 3 solidarisée mécaniquement par un embrèvement 7 à une partie en graphite polycristallin 4. Le métal réfractaire 5 est fixé sur cette dernière.. In FIG. 2, the assembly comprises an anticathode 1 fixed to a rod 2. The support of the anticathode consists of a part in carbon / carbon composite 3 mechanically secured by a recess 7 to a part in polycrystalline graphite 4. The refractory metal 5 is fixed on the latter.

Le contact thermique entre les deux parties est assuré par une brasure, ou un métal en poudre tel que du zirconium par exemple, ou du graphite en poudre, etc.. (repère 8).The thermal contact between the two parts is provided by a solder, or a powdered metal such as zirconium for example, or powdered graphite, etc. (item 8).

. Sur la figure 3, le montage comprend une anticathode 1 fixée à une tige 2. Le support de l'anticathode est constitué d'une partie en composite carbone/carbone 3 ayant la forme d'une cuvette dans laquelle se trouce la partie en graphite polycristallin 4. Le métal réfractaire 5 est fixé sur cette dernière.. In FIG. 3, the assembly comprises an anticathode 1 fixed to a rod 2. The support of the anticathode consists of a part made of carbon / carbon composite 3 having the shape of a bowl in which the graphite part is pierced polycrystalline 4. The refractory metal 5 is fixed on the latter.

Le contact thermique entre les deux parties est assuré par une brasure ou un métal en poudre, ou du graphite en poudre, ou par une feuille de graphite souple (repère 8).The thermal contact between the two parts is ensured by a solder or a powdered metal, or powdered graphite, or by a flexible graphite sheet (item 8).

. Sur la figure 4, le montage comprend une anticathode 1 fixée à une tige 2. Le support de l'anticathode est constitué d'une partie en composite carbone/carbone 3 dans laquelle vient s'encastrer une cuvette annulaire en graphite polycristallin 4. Le métal réfractaire 5, lui-même de forme annulaire s'encastre dans.l'anneau 4.. In FIG. 4, the assembly comprises an anticathode 1 fixed to a rod 2. The support of the anticathode consists of a carbon / carbon composite part 3 into which an annular polycrystalline graphite bowl 4 is embedded. refractory metal 5, itself of annular shape, is embedded in the ring 4.

Les liaisons mécaniques et thermiques entre composite carbone/carbone et graphite polycristallin, et entre graphite polycristallin et métal réfractaire sont assurées par exemple par brasage (respectivement repères 9 et 10).The mechanical and thermal connections between carbon / carbon composite and polycrystalline graphite, and between polycrystalline graphite and refractory metal are ensured for example by brazing (marks 9 and 10 respectively).

. Sur la figure 5, le montage comprend une anticathode 1 fixée à une tige 2. Le support de l'anticathode est constitué par une partie en composite carbone/carbone 3 entourant un disque plan en graphite polycristallin 4. Le métal réfractaire 5 est fixé sur ce dernier.. In FIG. 5, the assembly comprises an anticathode 1 fixed to a rod 2. The support of the anticathode consists of a part made of carbon / carbon composite 3 surrounding a flat disc made of polycrystalline graphite 4. The refractory metal 5 is fixed on this last.

La solidarisation de ces deux parties peut se faire par frettage.The joining of these two parts can be done by shrinking.

Dans les montages illustrés par les figures 1,2 et 3 pour une géométrie de l'anticathode définie, l'épaisseur de la partie en graphite polycristallin portant le métal réfractaire est minimale et l'épaisseur de la partie en composite carbone/carbone est maximale.In the assemblies illustrated in FIGS. 1, 2 and 3 for a defined geometry of the anticathode, the thickness of the polycrystalline graphite part carrying the refractory metal is minimum and the thickness of the carbon / carbon composite part is maximum .

Ainsi, par exemple, pour des épaisseurs de graphite polycristallin de l'ordre de 2 à 8 mm, on a des épaisseurs de composite carbone/carbone de l'ordre de 10 à 20 mm.Thus, for example, for thicknesses of polycrystalline graphite of the order of 2 to 8 mm, there are thicknesses of carbon / carbon composite of the order of 10 to 20 mm.

L'épaisseur du métal réfractaire varie en général selon qu'il est fixé par brasure ou déposé par dépôt chimique en phase vapeur. Dans le premier cas, elle est de l'ordre de 3 à 8 mm, dans le second de 0,4 à 1 mm.The thickness of the refractory metal generally varies depending on whether it is fixed by brazing or deposited by chemical vapor deposition. In the first case, it is of the order of 3 to 8 mm, in the second of 0.4 to 1 mm.

L'exemple suivant, donné à titre indicatif et non limitatif, montre tout l'intérêt de l'invention.The following example, given by way of non-limiting example, shows the whole point of the invention.

Exemple de mise en oeuvre-Example of implementation-

On réalise une série de supports pour anticathodes telles que représentées figure 3. Chaque support a un diamètre de 120 mm. L'épaisseur maximale de la partie en graphite polycristallin est de 8 mm et l'épaisseur de la partie composite carbone/carbone est de 15 mm.A series of supports for anticathodes are produced as shown in FIG. 3. Each support has a diameter of 120 mm. The maximum thickness of the polycrystalline graphite part is 8 mm and the thickness of the carbon / carbon composite part is 15 mm.

Le graphite polycristallin, nuance 1116 PT de la demanderesse a les caractéristiques suivantes :

Figure imgb0001
The applicant's grade 1116 PT polycrystalline graphite has the following characteristics:
Figure imgb0001

Le composite carbone/carbone est un AEROLOR (marque déposée par la demanderesse), l'AEROLOR 22 qui a les caractéristiques suivantes :

Figure imgb0002
The carbon / carbon composite is an AEROLOR (trademark registered by the applicant), the AEROLOR 22 which has the following characteristics:
Figure imgb0002

Le contact thermique entre les deux parties est assuré par une brasure au zirconium telle que décrite dans le brevet FR-A-1 249 498.The thermal contact between the two parts is ensured by a solder with zirconium as described in patent FR-A-1,249,498.

On revêt par dépôt chimique en phase vapeur la partie en graphite polycristallin de la moitié des supports, d'une couche de tungstène de 1,0 mm d'épaisseur.The polycrystalline graphite part of half of the supports is coated by chemical vapor deposition with a layer of tungsten 1.0 mm thick.

Les supports revêtus ou non sont soumis à un test d'éclatement et les résultats obtenus sont comparés à ceux obtenus avec des supports classiques en graphite polycristallin uniquement, revêtus ou non de la même épaisseur de tungstène.The supports, coated or not, are subjected to a burst test and the results obtained are compared to those obtained with conventional supports in polycrystalline graphite only, coated or not with the same thickness of tungsten.

Tous ces résultats sont regroupés dans le tableau 1 suivant :

Figure imgb0003
All these results are collated in the following table 1:
Figure imgb0003

En faisant la moyenne de ces résultats, on constate que :

  • - la vitesse d'éclatement d'un support suivant l'invention,non revêtu,est de l'ordre de 39 000 tours/mn alors que celle d'un support classique non revêtu est de l'ordre de 24 000 tours/mn
  • - la vitesse d'éclatement d'un support suivant l'invention revêtu de 1 mm de tungstène est de l'ordre de 32 000 tours/minute alors que celle d'un support classique revêtu également de 1 mm de tungstène est de l'ordre de 19 000 tours/minute.
By averaging these results, we see that:
  • - the burst speed of a support according to the invention, uncoated, is of the order of 39,000 revolutions / min while that of a conventional uncoated support is of the order of 24,000 revolutions / min
  • - the bursting speed of a support according to the invention coated with 1 mm of tungsten is of the order of 32,000 revolutions / minute while that of a conventional support also coated with 1 mm of tungsten is around 19,000 revolutions / minute.

Cette constatation montre tout l'intérêt de l'invention.This observation shows all the interest of the invention.

Claims (9)

1. Support en matériau carboné destiné à recevoir une couche de métal réfractaire pour anticathode tournante de tubes à rayons X, support caractérisé en ce qu'il est constitué de deux parties solidaires l'une de l'autre, l'une étant en composite carbone/carbone, l'autre en graphite polycristallin, cette dernière étant destinée à recevoir la couche de métal réfractaire.1. Support in carbon material intended to receive a layer of refractory metal for rotating anticathode of X-ray tubes, support characterized in that it consists of two parts integral with each other, one being made of composite carbon / carbon, the other in polycrystalline graphite, the latter being intended to receive the refractory metal layer. 2. Support selon la revendication 1 caractérisé en ce que les deux parties sont placées en relation superposée, le contact thermique entre elles étant assuré par tout procédé convenable tel que brasure, infiltration de carbone en phase vapeur, insertion de métal ou de graphite en poudre, insertion d'une feuille souple de graphite.2. Support according to claim 1 characterized in that the two parts are placed in superimposed relation, the thermal contact between them being ensured by any suitable method such as brazing, carbon infiltration in vapor phase, insertion of metal or graphite powder , insertion of a flexible graphite sheet. 3. Support selon la revendication 2 caractérisé en ce que les deux parties sont juxtaposées et rendues mécaniquement solidaires par tout procédé de liaison convenable, tel que brasure ou infiltration de carbone en phase vapeur.3. Support according to claim 2 characterized in that the two parts are juxtaposed and made mechanically integral by any suitable bonding process, such as brazing or carbon infiltration in the vapor phase. 4. Support selon la revendication 2 caractérisé en ce que les deux parties sont rendues solidaires mécaniquement par embrèvement.4. Support according to claim 2 characterized in that the two parts are made mechanically integral by recess. 5. Support selon la revendication 2 caractérisé en ce que les deux parties sont rendues solidaires mécaniquement par encastrement.5. Support according to claim 2 characterized in that the two parts are made mechanically integral by embedding. 6. Support selon l'une quelconque des revendications 2 à 5 caractérisé en ce que l'épaisseur de la partie en composite carbone/carbone est plus grande que celle de la partie en graphite polycristallin.6. Support according to any one of claims 2 to 5 characterized in that the thickness of the carbon / carbon composite part is greater than that of the polycrystalline graphite part. 7. Support selon la revendication 1 caractérisé en ce que la partie en composite carbone/carbone entoure comme une ceinture la partie en graphite polycristallin.7. Support according to claim 1 characterized in that the carbon / carbon composite part surrounds the polycrystalline graphite part like a belt. 8. Support selon la revendication 7 caractérisé en ce que les deux parties sont rendues solidaires par frettage.8. Support according to claim 7 characterized in that the two parts are made integral by shrinking. 9. Anticathode tournante pour tube à rayons X caractérisé en ce qu'elle comporte un support tel que revendiqué dans l'une quelconque des revendications précédentes.9. Rotating anticathode for X-ray tube characterized in that it comprises a support as claimed in any one of the preceding claims.
EP87420026A 1986-01-30 1987-01-28 Support for rotating the anti-cathode of an x-ray tube Expired - Lifetime EP0236241B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87420026T ATE49323T1 (en) 1986-01-30 1987-01-28 CARRIER FOR ROTATING ANTICATHODE OF X-RAY TUBES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8601647A FR2593638B1 (en) 1986-01-30 1986-01-30 SUPPORT FOR ROTATING ANTICATHODE OF X-RAY TUBES
FR8601647 1986-01-30

Publications (2)

Publication Number Publication Date
EP0236241A1 true EP0236241A1 (en) 1987-09-09
EP0236241B1 EP0236241B1 (en) 1990-01-03

Family

ID=9331874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87420026A Expired - Lifetime EP0236241B1 (en) 1986-01-30 1987-01-28 Support for rotating the anti-cathode of an x-ray tube

Country Status (9)

Country Link
US (1) US4847883A (en)
EP (1) EP0236241B1 (en)
JP (1) JPS63164150A (en)
AT (1) ATE49323T1 (en)
CA (1) CA1264801A (en)
DE (1) DE3761346D1 (en)
ES (1) ES2012408B3 (en)
FR (1) FR2593638B1 (en)
GR (1) GR3000291T3 (en)

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FR2686732A1 (en) * 1992-01-24 1993-07-30 Gen Electric Cgr Graphite anode for X-ray tube and tube thus obtained
DE19906854A1 (en) * 1999-02-18 2000-08-31 Siemens Ag Rotary anode for X-ray tube

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FR2654387B1 (en) * 1989-11-16 1992-04-10 Lorraine Carbone MULTILAYER MATERIAL COMPRISING FLEXIBLE GRAPHITE MECHANICALLY, ELECTRICALLY AND THERMALLY REINFORCED BY A METAL AND METHOD OF MANUFACTURE.
US5247563A (en) * 1992-02-25 1993-09-21 General Electric Company High vapor pressure metal for X-ray anode braze joint
FR2702086B1 (en) * 1992-10-15 1995-03-31 General Electric Cgr Rotating anode for composite X-ray tube.
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US5875228A (en) * 1997-06-24 1999-02-23 General Electric Company Lightweight rotating anode for X-ray tube
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DE102005034687B3 (en) * 2005-07-25 2007-01-04 Siemens Ag Rotary bulb radiator for producing x-rays has rotary bulb whose inner floor contains anode of first material; floor exterior carries structure for accommodating heat conducting element(s) of higher thermal conductivity material
US7382864B2 (en) * 2005-09-15 2008-06-03 General Electric Company Systems, methods and apparatus of a composite X-Ray target
US8553844B2 (en) * 2007-08-16 2013-10-08 Koninklijke Philips N.V. Hybrid design of an anode disk structure for high prower X-ray tube configurations of the rotary-anode type
JP5676594B2 (en) * 2009-06-29 2015-02-25 コーニンクレッカ フィリップス エヌ ヴェ Anode disk element with heat dissipation element
CN106575592B (en) * 2014-08-12 2020-10-16 皇家飞利浦有限公司 Rotary anode and method for producing a rotary anode

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Also Published As

Publication number Publication date
FR2593638B1 (en) 1988-03-18
JPS63164150A (en) 1988-07-07
JPH0361301B2 (en) 1991-09-19
ES2012408B3 (en) 1990-03-16
DE3761346D1 (en) 1990-02-08
EP0236241B1 (en) 1990-01-03
FR2593638A1 (en) 1987-07-31
CA1264801A (en) 1990-01-23
ATE49323T1 (en) 1990-01-15
US4847883A (en) 1989-07-11
GR3000291T3 (en) 1991-03-15

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