US3890521A - X-ray tube target and X-ray tubes utilising such a target - Google Patents

X-ray tube target and X-ray tubes utilising such a target Download PDF

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Publication number
US3890521A
US3890521A US318904A US31890472A US3890521A US 3890521 A US3890521 A US 3890521A US 318904 A US318904 A US 318904A US 31890472 A US31890472 A US 31890472A US 3890521 A US3890521 A US 3890521A
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United States
Prior art keywords
carrier
target
layer
carbide
contact
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.)
Expired - Lifetime
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US318904A
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English (en)
Inventor
Arvind Shroff
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Thales SA
Original Assignee
Thomson CSF SA
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Filing date
Publication date
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Publication of US3890521A publication Critical patent/US3890521A/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

Definitions

  • ABSTRACT relates to a graphite target for X-ray tubes.
  • the invention provides for the formation of the intermediate layer (2) in these targets, in the shape of two sub-layers one of which (20), in contact with the carrier, is made of a refractory material which does not form a carbide (iridium for example), and the other of which (21) is made of another refractory material (tantalum for example), which prevents diffusion of carbon from the carrier into the emissive layer.
  • the present invention relates to a target for X-ray tubes, more particularly a rotating target. and to the X-ray tubes utilising such a target.
  • Targets which are constituted by a carrier or base of graphite, to which there is applied an emissive layer producing an X-ray stream under the impact of electrons coming from the tube cathode.
  • tungsten is particularly advantageous and is often given preferencev
  • the object of the present invention is to improve targets of the kind hereinbefore described. More precisely, the invention relates to a target structure for X-ray tubes. on a graphite base, which prevents too rapid transformation to carbide on the part of the emissive layer and gives the tube a long surface life.
  • the invention provides for the arrangement between the carrier or base, and the emissive layer, of an intermediate layer made up of two sublayers as described hereinafter.
  • a target for X-ray tubes constituted by a carrier ofgraphite and an emissive layer made of a refractory metal having a high atomic number. covering said carrier and the two layers being separated by an intermediate layer. characterised in that said intermediate layer is constituted by two sub-layers one of which. that in contact with the carrier and referred to as the first sub-layer. is made of a refractory material which does not form a carbide and is in contact with the carrier, and the other of which. that is the second sub-layer. is in contact with the emissive layer and made of another refractory material.
  • the sublayer 20 is constituted by iridium, the sub-layer 21 by tantalum. and the emissive layer 3 by tungsten.
  • the adhesion of the tantalum carbide to the graphite is ensured because of the plasticity of the iridium sublayer which takes up the effect of the difference in coefficient of expansion.
  • a sub-layer 20 instead of iridium other elements such as osmium and ruthenium, and for the sub-layer 21, instead of tantalum, other elements such as hafnium, niobium or zirconium.
  • a target for X-ray tubes constituted by a carrier of graphite and an emissive layer made of tungsten covering said carrier and being separated by an intermediate layer, said intermediate layer is constituted by two sublayers one ofwhich is in contact the carrier and is made of an element selected from the group consisting essentially of iridium. osmium and ruthenium, and the other in contact with the emissive layer is made of an element selected from the group consisting essentially of hafnium, niobium. tantalum and zirconium.

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  • Analysing Materials By The Use Of Radiation (AREA)
  • X-Ray Techniques (AREA)
  • Solid Thermionic Cathode (AREA)
US318904A 1971-12-31 1972-12-27 X-ray tube target and X-ray tubes utilising such a target Expired - Lifetime US3890521A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7147766A FR2166625A5 (enrdf_load_stackoverflow) 1971-12-31 1971-12-31

Publications (1)

Publication Number Publication Date
US3890521A true US3890521A (en) 1975-06-17

Family

ID=9088472

Family Applications (1)

Application Number Title Priority Date Filing Date
US318904A Expired - Lifetime US3890521A (en) 1971-12-31 1972-12-27 X-ray tube target and X-ray tubes utilising such a target

Country Status (4)

Country Link
US (1) US3890521A (enrdf_load_stackoverflow)
DE (1) DE2263820A1 (enrdf_load_stackoverflow)
FR (1) FR2166625A5 (enrdf_load_stackoverflow)
GB (1) GB1385350A (enrdf_load_stackoverflow)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4119879A (en) * 1977-04-18 1978-10-10 General Electric Company Graphite disc assembly for a rotating x-ray anode tube
US4145632A (en) * 1977-04-18 1979-03-20 General Electric Company Composite substrate for rotating x-ray anode tube
US4227112A (en) * 1978-11-20 1980-10-07 The Machlett Laboratories, Inc. Gradated target for X-ray tubes
EP0023065A1 (de) * 1979-07-19 1981-01-28 Philips Patentverwaltung GmbH Drehanode für Röntgenröhren
US4266138A (en) * 1978-07-11 1981-05-05 Cornell Research Foundation, Inc. Diamond targets for producing high intensity soft x-rays and a method of exposing x-ray resists
USRE31369E (en) * 1977-04-18 1983-09-06 General Electric Company Method for joining an anode target comprising tungsten to a graphite substrate
USRE31560E (en) * 1977-04-18 1984-04-17 General Electric Company Graphite disc assembly for a rotating x-ray anode tube
USRE31568E (en) * 1977-04-18 1984-04-24 General Electric Company Composite substrate for rotating x-ray anode tube
US4597095A (en) * 1984-04-25 1986-06-24 General Electric Company Composite structure for rotating anode of an X-ray tube
US4641334A (en) * 1985-02-15 1987-02-03 General Electric Company Composite rotary anode for X-ray tube and process for preparing the composite
US4645121A (en) * 1985-02-15 1987-02-24 General Electric Company Composite rotary anode for X-ray tube and process for preparing the composite
US4670895A (en) * 1984-06-29 1987-06-02 Thomson-Cgr X-ray tube with a rotary anode and process for fixing a rotary anode to a support shaft
FR2593324A1 (fr) * 1986-01-17 1987-07-24 Thomson Cgr Anode tournante avec graphite pour tube radiogene
US4689810A (en) * 1985-02-15 1987-08-25 General Electric Company Composite rotary anode for X-ray tube and process for preparing the composite
EP0249141A3 (en) * 1986-06-13 1988-07-13 General Electric Company X-ray tube target
US4777643A (en) * 1985-02-15 1988-10-11 General Electric Company Composite rotary anode for x-ray tube and process for preparing the composite
USH547H (en) 1986-11-13 1988-11-01 General Electric Company X-ray tube target
US5204891A (en) * 1991-10-30 1993-04-20 General Electric Company Focal track structures for X-ray anodes and method of preparation thereof
US5222116A (en) * 1992-07-02 1993-06-22 General Electric Company Metallic alloy for X-ray target
WO1994023458A3 (en) * 1993-04-05 1994-11-10 Wilent Virginia & Hf X-ray detector for a low dosage scanning beam digital x-ray imaging system
US5550378A (en) * 1993-04-05 1996-08-27 Cardiac Mariners, Incorporated X-ray detector
US5610967A (en) * 1993-01-25 1997-03-11 Cardiac Mariners, Incorporated X-ray grid assembly
US5682412A (en) * 1993-04-05 1997-10-28 Cardiac Mariners, Incorporated X-ray source
WO1998011592A1 (en) * 1996-09-13 1998-03-19 Varian Associates, Inc. X-ray target having high z particles imbedded in a matrix
US9053897B2 (en) 2010-12-16 2015-06-09 Koninklijke Philips N.V. Anode disk element with refractory interlayer and VPS focal track

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4073426A (en) * 1977-04-18 1978-02-14 General Electric Company Method for joining an anode target comprising tungsten to a graphite substrate
FR2535344A1 (fr) * 1982-10-29 1984-05-04 Thomson Csf Procede de depot selectif d'une couche de metal refractaire sur une piece en graphite
AT392760B (de) * 1989-05-26 1991-06-10 Plansee Metallwerk Verbundkoerper aus graphit und hochschmelzendem metall
US6118853A (en) * 1998-10-06 2000-09-12 Cardiac Mariners, Inc. X-ray target assembly
DE102009033607A1 (de) * 2009-07-17 2011-01-20 Siemens Aktiengesellschaft Röntgenröhre und Anode für eine Röntgenröhre

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3504327A (en) * 1965-06-14 1970-03-31 Sfec Heater element
US3649355A (en) * 1968-08-12 1972-03-14 Schwarzopf Dev Corp Process for production of rotary anodes for roentgen tubes
US3731128A (en) * 1972-03-08 1973-05-01 Siemens Ag X-ray tube with rotary anodes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3504327A (en) * 1965-06-14 1970-03-31 Sfec Heater element
US3649355A (en) * 1968-08-12 1972-03-14 Schwarzopf Dev Corp Process for production of rotary anodes for roentgen tubes
US3731128A (en) * 1972-03-08 1973-05-01 Siemens Ag X-ray tube with rotary anodes

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE31369E (en) * 1977-04-18 1983-09-06 General Electric Company Method for joining an anode target comprising tungsten to a graphite substrate
US4145632A (en) * 1977-04-18 1979-03-20 General Electric Company Composite substrate for rotating x-ray anode tube
US4119879A (en) * 1977-04-18 1978-10-10 General Electric Company Graphite disc assembly for a rotating x-ray anode tube
USRE31568E (en) * 1977-04-18 1984-04-24 General Electric Company Composite substrate for rotating x-ray anode tube
USRE31560E (en) * 1977-04-18 1984-04-17 General Electric Company Graphite disc assembly for a rotating x-ray anode tube
US4266138A (en) * 1978-07-11 1981-05-05 Cornell Research Foundation, Inc. Diamond targets for producing high intensity soft x-rays and a method of exposing x-ray resists
US4227112A (en) * 1978-11-20 1980-10-07 The Machlett Laboratories, Inc. Gradated target for X-ray tubes
US4352041A (en) * 1979-07-19 1982-09-28 U.S. Philips Corporation Rotary anodes for X-ray tubes
EP0023065A1 (de) * 1979-07-19 1981-01-28 Philips Patentverwaltung GmbH Drehanode für Röntgenröhren
US4597095A (en) * 1984-04-25 1986-06-24 General Electric Company Composite structure for rotating anode of an X-ray tube
US4670895A (en) * 1984-06-29 1987-06-02 Thomson-Cgr X-ray tube with a rotary anode and process for fixing a rotary anode to a support shaft
US4641334A (en) * 1985-02-15 1987-02-03 General Electric Company Composite rotary anode for X-ray tube and process for preparing the composite
US4645121A (en) * 1985-02-15 1987-02-24 General Electric Company Composite rotary anode for X-ray tube and process for preparing the composite
US4689810A (en) * 1985-02-15 1987-08-25 General Electric Company Composite rotary anode for X-ray tube and process for preparing the composite
US4777643A (en) * 1985-02-15 1988-10-11 General Electric Company Composite rotary anode for x-ray tube and process for preparing the composite
US4799250A (en) * 1986-01-17 1989-01-17 Thomson-Cgr Rotating anode with graphite for X-ray tube
FR2593324A1 (fr) * 1986-01-17 1987-07-24 Thomson Cgr Anode tournante avec graphite pour tube radiogene
EP0234967A1 (fr) * 1986-01-17 1987-09-02 General Electric Cgr S.A. Anode tournante avec graphite pour tube radiogène
EP0249141A3 (en) * 1986-06-13 1988-07-13 General Electric Company X-ray tube target
USH547H (en) 1986-11-13 1988-11-01 General Electric Company X-ray tube target
US5204891A (en) * 1991-10-30 1993-04-20 General Electric Company Focal track structures for X-ray anodes and method of preparation thereof
US5222116A (en) * 1992-07-02 1993-06-22 General Electric Company Metallic alloy for X-ray target
US5729584A (en) * 1993-01-25 1998-03-17 Cardiac Mariners, Inc. Scanning-beam X-ray imaging system
US5610967A (en) * 1993-01-25 1997-03-11 Cardiac Mariners, Incorporated X-ray grid assembly
US5644612A (en) * 1993-01-25 1997-07-01 Cardiac Mariners, Inc. Image reconstruction methods
US5651047A (en) * 1993-01-25 1997-07-22 Cardiac Mariners, Incorporated Maneuverable and locateable catheters
US5751785A (en) * 1993-01-25 1998-05-12 Cardiac Mariners, Inc. Image reconstruction methods
US5835561A (en) * 1993-01-25 1998-11-10 Cardiac Mariners, Incorporated Scanning beam x-ray imaging system
US5859893A (en) * 1993-01-25 1999-01-12 Cardiac Mariners, Inc. X-ray collimation assembly
US5550378A (en) * 1993-04-05 1996-08-27 Cardiac Mariners, Incorporated X-ray detector
US5682412A (en) * 1993-04-05 1997-10-28 Cardiac Mariners, Incorporated X-ray source
WO1994023458A3 (en) * 1993-04-05 1994-11-10 Wilent Virginia & Hf X-ray detector for a low dosage scanning beam digital x-ray imaging system
WO1998011592A1 (en) * 1996-09-13 1998-03-19 Varian Associates, Inc. X-ray target having high z particles imbedded in a matrix
US9053897B2 (en) 2010-12-16 2015-06-09 Koninklijke Philips N.V. Anode disk element with refractory interlayer and VPS focal track

Also Published As

Publication number Publication date
DE2263820A1 (de) 1973-07-05
GB1385350A (en) 1975-02-26
FR2166625A5 (enrdf_load_stackoverflow) 1973-08-17

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