EP0322280A1 - Drehanode aus zusammengesetztem Material für Röntgenröhre - Google Patents

Drehanode aus zusammengesetztem Material für Röntgenröhre Download PDF

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Publication number
EP0322280A1
EP0322280A1 EP88403178A EP88403178A EP0322280A1 EP 0322280 A1 EP0322280 A1 EP 0322280A1 EP 88403178 A EP88403178 A EP 88403178A EP 88403178 A EP88403178 A EP 88403178A EP 0322280 A1 EP0322280 A1 EP 0322280A1
Authority
EP
European Patent Office
Prior art keywords
carbon
graphite
composite material
rotating anode
target
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP88403178A
Other languages
English (en)
French (fr)
Inventor
Christine Guerin
Jean-Marie Penato
Yves Debrouwer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric CGR SA
Original Assignee
General Electric CGR SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric CGR SA filed Critical General Electric CGR SA
Publication of EP0322280A1 publication Critical patent/EP0322280A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to a rotating anode of an X-ray tube, particularly an anode of the type comprising a base body of carbon-carbon composite material carrying a target formed by the deposition of at least one layer of an X-ray emitting material. .
  • X-ray radiation is obtained under the effect of electron bombardment of a layer of a target material, that is to say generally a material to high atomic number, refractory and good conductor of heat; such a target material being commonly constituted for example by tungsten, molybdenum or their alloys, etc.
  • a target material that is to say generally a material to high atomic number, refractory and good conductor of heat; such a target material being commonly constituted for example by tungsten, molybdenum or their alloys, etc.
  • focal point which constitutes the source of X-ray radiation.
  • the gain is all the greater as the linear speed of movement of the focal ring under the focal point is high; the increase in this speed of movement being obtained either by an increase in the speed of rotation of the rotary anode, or by an increase in the diameter of the anode.
  • rotating anodes of the type comprising a base body or substrate, having the general shape of a disc, and on which is deposited one or more layers of an X-ray emissive material or material target.
  • the adhesion of the target material layer on the base body is improved by the prior deposition of an intermediate bonding layer, in rhenium for example, the layer of target material being deposited on the intermediate bonding layer .
  • the base body is commonly made of so-called monolithic graphite, which has excellent thermal conductivity and emissivity characteristics.
  • one of the drawbacks of graphite is that it has a certain mechanical brittleness which prevents giving the anode very high speeds of rotation.
  • the carbon-carbon composite material consists of a fibrous fabric, formed by the two or three-dimensional intertwining of carbon fibers.
  • one of the drawbacks of the carbon-carbon composite material is that it has a very low coefficient of expansion, close to 0, and consequently very different from the coefficient of expansion of most of the target materials, and in particular of the pure or alloyed tungsten. This can in particular result in shearing effects, at the interface between the external layers of the carbon-carbon composite material and the layer of material. target, or even with the intermediate bonding layer which generally has a coefficient of expansion close to that of the target material.
  • the invention relates to a rotating anode of an X-ray tube, which can be used at high rotational speeds or with large diameters, and which does not have the drawbacks mentioned above.
  • a rotating anode for an X-ray tube comprising a base body on which a target is formed by the deposition of at least one layer of target material, characterized in that the base body comprises a first central part constituted at least in part by a carbon-carbon composite material and a second part in monolithic graphite carrying the target and arranged at least in part at the periphery of the first, the two parts being mechanically linked to each other by a connecting means, such as a solder, located at the junction of the two parts.
  • This arrangement allows the first part in carbon-carbon composite material to ensure in particular the mechanical strength of the anode and allows the second part in graphite (monolithic) to ensure in particular the adhesion of the layer of target material as well as its thermal conductivity;
  • Figure 1 shows, by way of non-limiting example, a rotating anode 1 for X-ray tube (not shown).
  • the anode 1 is constituted by a basic body 8 having the general shape of a disc, and having an axis of symmetry 2 around which the anode 1 is intended to be rotated, as symbolized for example by an arrow 3 .
  • the rotating anode 1 is constituted, on the one hand, by two circular plates 5, 6 centered on the axis of symmetry 2 and having substantially the same diameter D1 the two plates 5, 6 being made of carbon-carbon composite material.
  • the rotating anode 1 also comprises a graphite disc 7 of the type usually used in anodes, in monolithic graphite for example.
  • the disk 7 is disposed between the two plates 5, 6 and has an axis of symmetry which coincides with the axis of symmetry 2 of the anode 1.
  • the plates 5, 6 and the disk 7 in graphite are drilled so as to constitute a hole 4 arranged along the axis of symmetry 2, and intended to allow the fixing of the rotating anode 1 on its support (not shown).
  • the two plates 5, 6 are strongly and rigidly linked to each other by the graphite disc 7.
  • a first and a second inner face 10, 11 of the graphite disc 7 are secured and linked respectively to a first internal face 13 of the first plate 5 and a second internal face 14 of the second plate 6.
  • These connections between the faces 10, 11 of the graphite disc 7 and the internal faces 13, 14 of the plates 5, 6 are produced for example by gluing or by brazing (or by any other means), as symbolized in the figure. by layers 17 of brazing formed between the interior faces 10, 11 of the disc, that is to say at the junction of these elements.
  • the graphite disk 7 has a second diameter D2 greater than the first diameter D1 of the plates 5, 6 so that, relative to the latter, the graphite disk 7 comprises a body 12 sandwiched between the plates 5, 6 and a part protruding 9 which forms a peripheral graphite ring.
  • the two main faces 20, 21 of the rotating anode 1 appear with a central part formed by the plates 5, 6 made of carbon-carbon composite material, and with a peripheral part, formed by the peripheral ring 9 in graphite.
  • the plates 5, 6 made of carbon-carbon composite material have the function of imparting to the rotating anode 1, the required mechanical rigidity; and the peripheral ring 9 in graphite has the function in particular of constituting a support for a target 30 intended to be subjected to an electronic bombardment with a view to producing, in itself conventional manner, X-ray radiation.
  • an outer face 31 of the peripheral ring 9, located on the side of the first plate 5, is inclined relative to the plane of the plate 5, and forms around the latter a sloping portion 31 on which is formed the target 30.
  • an intermediate bonding layer 35 in rhenium is deposited on the steep part 31 and at least one layer of material target 36 deposited on the intermediate bonding layer 35 constitutes target 30.
  • Figure 2 schematically shows a second embodiment of the rotating anode 1 according to the invention.
  • the rotating anode 1 comprises a main disc 40 made of carbon-carbon composite material and whose axis of symmetry 2 is intended to constitute the axis of rotation of the rotating anode 1.
  • the rotating anode further comprises a second graphite ring 41 centered on the axis of symmetry 2, and which is attached to the periphery of the main disc 40, on a edge 42 of the latter.
  • the second graphite ring 41 is secured or linked to the main disc 40 very strongly by a connecting element, by brazing for example (or by any other means) symbolized in FIG. 2 by a layer of brazing 43; the brazing layer 43 being formed between the edge 42 of the main disc 40 and an interior surface 45 by which the second graphite ring 41 is secured to the main disc 40.
  • the second graphite ring 41 constitutes a support for a target 30 intended to be subjected to electronic bombardment.
  • the target 30 is carried on a sloping face 50 of the second graphite ring 41; the target 30 is constituted by a layer of target material 36 deposited on an intermediate bonding layer 35 which, itself, is deposited on the sloping face 50 of the second target support or second ring 41 of graphite.
  • Figure 3 gives a third embodiment of the rotating anode (1) according to the invention.
  • the rotating anode 1 comprises a central hub 60 made of carbon-carbon composite material, the axis of symmetry 2 of which is intended to constitute the axis of rotation of the rotating anode 1.
  • the outer diameter D3 of the hub 60 is smaller than the diameter D1 of the plates 66 and 67.
  • the rotating anode further comprises a graphite ring 61, centered on the axis of symmetry 2, and which is attached to the periphery 64 of the hub 60.
  • the graphite ring 61 is secured or linked to the hub 60 very strongly by a connecting element, by brazing for example (or any other means) symbolized in FIG. 3 by a layer of brazing 63.
  • This solder 63 is formed between the outer peripheral surface 64 of the hub 60 and an inner surface 65.
  • the thicknesses of the hub 60 and of the ring 61 are equal and the relative position of these two elements is such that their lateral faces are aligned.
  • the hub 60 and the ring 61 are held between two circular plates 66 and 67 centered on the axis of symmetry 2 and having substantially the same diameter D1.
  • the two plates 66 and 67 are made of carbon-carbon composite material and are drilled so as to constitute a hole 68 which is arranged along the axis of symmetry 2 and which is intended to allow the fixing of the rotating anode 1 on its support. (not shown).
  • the two plates 66 and 67 are strongly and rigidly linked to each other by the hub 60 and the ring 61, this connection being produced for example by bonding or by brazing (or by any other means), as symbolized on the figure by layers 69 of solder formed between the opposite faces of the plates 66 and 67 on the one hand, and of the hub 60 and of the ring 61 on the other hand.
  • the hub 60 has two parts and each part is fixed to a plate 66 or 67; two half-hubs are thus obtained with lateral flanges which are assembled by the opposite faces of the half-hubs.

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  • X-Ray Techniques (AREA)
EP88403178A 1987-12-22 1988-12-14 Drehanode aus zusammengesetztem Material für Röntgenröhre Withdrawn EP0322280A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8717882A FR2625035B1 (fr) 1987-12-22 1987-12-22 Anode tournante en materiau composite pour tube a rayons x
FR8717882 1987-12-22

Publications (1)

Publication Number Publication Date
EP0322280A1 true EP0322280A1 (de) 1989-06-28

Family

ID=9358132

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88403178A Withdrawn EP0322280A1 (de) 1987-12-22 1988-12-14 Drehanode aus zusammengesetztem Material für Röntgenröhre

Country Status (4)

Country Link
US (1) US4958364A (de)
EP (1) EP0322280A1 (de)
JP (1) JPH01209640A (de)
FR (1) FR2625035B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3019372A1 (fr) * 2014-03-31 2015-10-02 Acerde Anode pour l'emission de rayons x et procede de fabrication

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989011889A1 (fr) * 1988-06-06 1989-12-14 Sumitomo Electric Industries, Ltd. Catheter
FR2655192A1 (fr) * 1989-11-28 1991-05-31 Gen Electric Cgr Anode pour tube a rayons x a corps de base composite.
FR2655191A1 (fr) * 1989-11-28 1991-05-31 Genral Electric Cgr Sa Anode pour tube a rayons x.
US5382769A (en) * 1990-04-03 1995-01-17 Lockheed Corporation Resistance brazed joints for carbon/carbon structures
US5247563A (en) * 1992-02-25 1993-09-21 General Electric Company High vapor pressure metal for X-ray anode braze joint
US5855313A (en) * 1997-04-08 1999-01-05 Mcdonnell Douglas Corporation Two-step brazing process for joining materials with different coefficients of thermal expansion
AU4044997A (en) * 1996-07-24 1998-02-10 Mcdonnell Douglas Corporation Two-step brazing process for joining materials with different coefficients of thermal expansion
US6052434A (en) * 1996-12-27 2000-04-18 Toth; Thomas L. X-ray tube target for reduced off-focal radiation
US5875228A (en) * 1997-06-24 1999-02-23 General Electric Company Lightweight rotating anode for X-ray tube
US5943389A (en) * 1998-03-06 1999-08-24 Varian Medical Systems, Inc. X-ray tube rotating anode
US7545089B1 (en) 2005-03-21 2009-06-09 Calabazas Creek Research, Inc. Sintered wire cathode
US7382864B2 (en) * 2005-09-15 2008-06-03 General Electric Company Systems, methods and apparatus of a composite X-Ray target
US8116432B2 (en) 2007-04-20 2012-02-14 General Electric Company X-ray tube target brazed emission layer
US8428222B2 (en) * 2007-04-20 2013-04-23 General Electric Company X-ray tube target and method of repairing a damaged x-ray tube target
CN101779267A (zh) 2007-08-16 2010-07-14 皇家飞利浦电子股份有限公司 用于旋转阳极型高功率x射线管构造的阳极盘结构的混合设计
WO2011018750A1 (en) * 2009-08-11 2011-02-17 Koninklijke Philips Electronics N.V. Rotary anode for a rotary anode x-ray tube and method for manufacturing a rotary anode
DE102010041532A1 (de) * 2010-09-28 2012-01-05 Siemens Aktiengesellschaft Verbundbauteil
WO2016023669A1 (en) * 2014-08-12 2016-02-18 Koninklijke Philips N.V. Rotating anode and method for producing a rotating anode
AT17122U1 (de) * 2020-02-10 2021-06-15 Plansee Se Röntgendrehanode

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050893A1 (de) * 1980-10-29 1982-05-05 Philips Patentverwaltung GmbH Röntgenröhren-Drehanode
FR2496981A1 (fr) * 1980-12-22 1982-06-25 Siemens Ag Anode tournante pour tubes a rayons x
FR2593325A1 (fr) * 1986-01-21 1987-07-24 Thomson Cgr Anode tournante a graphite pour tube radiogene
FR2593638A1 (fr) * 1986-01-30 1987-07-31 Lorraine Carbone Support pour anticathode tournante de tubes a rayons x

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
US3821581A (en) * 1971-08-02 1974-06-28 Machlett Lab Inc Targets for x ray tubes
US3795832A (en) * 1972-02-28 1974-03-05 Machlett Lab Inc Target for x-ray tubes
US3753021A (en) * 1972-04-03 1973-08-14 Machlett Lab Inc X-ray tube anode target
US3900751A (en) * 1974-04-08 1975-08-19 Machlett Lab Inc Rotating anode x-ray tube
DE2646454C2 (de) * 1976-10-14 1985-01-03 Siemens AG, 1000 Berlin und 8000 München Röntgenröhren-Drehanode
DE2910138A1 (de) * 1979-03-15 1980-09-25 Philips Patentverwaltung Anodenscheibe fuer eine drehanoden- roentgenroehre
DE2928993C2 (de) * 1979-07-18 1982-12-09 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren zur Herstellung einer Röntgenröhren-Drehanode
JPS60225343A (ja) * 1984-04-23 1985-11-09 Toshiba Corp Ｘ線管用回転陽極及びその製造方法
FR2593324B1 (fr) * 1986-01-17 1988-03-25 Thomson Cgr Anode tournante avec graphite pour tube radiogene
JPH025343A (ja) * 1988-06-15 1990-01-10 Teru Barian Kk イオン注入方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050893A1 (de) * 1980-10-29 1982-05-05 Philips Patentverwaltung GmbH Röntgenröhren-Drehanode
FR2496981A1 (fr) * 1980-12-22 1982-06-25 Siemens Ag Anode tournante pour tubes a rayons x
FR2593325A1 (fr) * 1986-01-21 1987-07-24 Thomson Cgr Anode tournante a graphite pour tube radiogene
FR2593638A1 (fr) * 1986-01-30 1987-07-31 Lorraine Carbone Support pour anticathode tournante de tubes a rayons x

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 10, no. 79 (E-391)[2136], 28 mars 1986, page 110 E 391; & JP-A-60 225 343 (TOSHIBA K.K.) 09-11-1985 *
PATENT ABSTRACTS OF JAPAN, vol. 7, no. 258 (E-211)[1403], 17 novembre 1983; & JP-A-58 142 749 (HITACHI SEISAKUSHO K.K.) 24-08-1983 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3019372A1 (fr) * 2014-03-31 2015-10-02 Acerde Anode pour l'emission de rayons x et procede de fabrication

Also Published As

Publication number Publication date
FR2625035B1 (fr) 1993-02-12
FR2625035A1 (fr) 1989-06-23
JPH01209640A (ja) 1989-08-23
US4958364A (en) 1990-09-18

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