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 PDFInfo
- 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
- Authority
- US
- 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
Links
Images
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
- 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.
Landscapes
- Analysing Materials By The Use Of Radiation (AREA)
- Solid Thermionic Cathode (AREA)
- X-Ray Techniques (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7147766A FR2166625A5 (de) | 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 (de) |
DE (1) | DE2263820A1 (de) |
FR (1) | FR2166625A5 (de) |
GB (1) | GB1385350A (de) |
Cited By (24)
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 |
EP0249141A2 (de) * | 1986-06-13 | 1987-12-16 | General Electric Company | Röntgenröhren-Treffplatte |
US4777643A (en) * | 1985-02-15 | 1988-10-11 | General Electric Company | Composite rotary anode for x-ray tube and process for preparing the composite |
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 |
WO1994023458A2 (en) * | 1993-04-05 | 1994-10-13 | Cardiac Mariners, Inc. | 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)
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)
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 |
-
1971
- 1971-12-31 FR FR7147766A patent/FR2166625A5/fr not_active Expired
-
1972
- 1972-12-27 US US318904A patent/US3890521A/en not_active Expired - Lifetime
- 1972-12-28 DE DE2263820A patent/DE2263820A1/de active Pending
- 1972-12-28 GB GB5992772A patent/GB1385350A/en not_active Expired
Patent Citations (3)
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 (35)
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 |
US4777643A (en) * | 1985-02-15 | 1988-10-11 | General Electric Company | Composite rotary anode for x-ray tube and process for preparing the composite |
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 |
FR2593324A1 (fr) * | 1986-01-17 | 1987-07-24 | Thomson Cgr | Anode tournante avec graphite pour tube radiogene |
EP0234967A1 (de) * | 1986-01-17 | 1987-09-02 | General Electric Cgr S.A. | Drehanode aus Graphit für Röntgenröhre |
US4799250A (en) * | 1986-01-17 | 1989-01-17 | Thomson-Cgr | Rotating anode with graphite for X-ray tube |
EP0249141A2 (de) * | 1986-06-13 | 1987-12-16 | General Electric Company | Röntgenröhren-Treffplatte |
EP0249141A3 (de) * | 1986-06-13 | 1988-07-13 | General Electric Company | Röntgenröhren-Treffplatte |
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 |
US5751785A (en) * | 1993-01-25 | 1998-05-12 | Cardiac Mariners, Inc. | Image reconstruction methods |
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 |
US5729584A (en) * | 1993-01-25 | 1998-03-17 | Cardiac Mariners, Inc. | Scanning-beam X-ray imaging system |
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 |
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 |
US5682412A (en) * | 1993-04-05 | 1997-10-28 | Cardiac Mariners, Incorporated | X-ray source |
WO1994023458A2 (en) * | 1993-04-05 | 1994-10-13 | Cardiac Mariners, Inc. | 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 |
---|---|
GB1385350A (en) | 1975-02-26 |
DE2263820A1 (de) | 1973-07-05 |
FR2166625A5 (de) | 1973-08-17 |
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