A flame spray material for producing a low thermal conductivity ceramic coating is comprised of a homogeneous ceramic composition formed of zirconium oxide, cerium oxide and yttrium oxide. The composition is preferably in the form of composite particles each of which contains a plurality of subparticles of each of the oxide constituents bonded with an organic binder.

Zirconium oxide powder containing cerium oxide and yttrium oxide

An x-ray tube target has improved heat dissipation by applying a layer of diamond between the focal track and the target body. The diamond layer can be applied directly to a graphite target body, a graphite disc covered with silicon carbide or to a disc composed of an molybdenum alloy such as TZM.

X-ray tube target

A method for the diffusion bonding of a graphite member to a metallic surface as part of a composite rotary anode for an X-ray tube is set forth. In the completed structure a compound laminate separating and metallurgically bonded to the graphite member and to the metallic surface consists of, in sequence, a layer comprising carbide of vanadium and of a metal selected from the group consisting of molybdenum and tungsten, a layer of metal selected from the group consisting of vanadium and vanadium alloys, a zone of interdiffused metals comprising platinum and vanadium and then a continuous layer comprising platinum or platinum alloy.

Composite rotary anode for X-ray tube and process for preparing the composite

Device and method are provided for separating images according to material species in nondestructive x-ray or γ-ray imaging. Using the x-ray (or γ-ray) attenuation coefficient of materials as functions of x-ray energy, simultaneous linear equations are set up and solved for obtaining the image for a specific material when multiple x-ray (or γ-ray) energies are used. The device disclosed in this invention features real-time, material-specific image separation. Applications include x-ray security inspection and industrial x-ray or γ-ray noninvasive structural inspection.

Device for material separation using nondestructive inspection imaging

A miniaturized, increased efficiency x-ray source for materials analysis includes a laser source, an optical delivery structure, a laser-driven thermionic cathode ( 108 ), an anode ( 122 ), and a target from the laser source and directs the beam onto a surface of the themionic cathode. The surfaces electrons form an electron beam along a beam path. The target element ( 110 ) is disposed in the beam path, and emits x-rays in response to incident accelerated electrons from the thermionic cathode. The target element includes an inclined surface that forms an angle of inclination ( 113 ) of about 40 degrees with respect to the electon beam path, so that x-rays are emitted from the target substantially at an angle of about 45 degrees with respect to the electron beam path.

X-ray source for materials analysis systems

A graphite target disk for a rotating anode x-ray tube is adapted for mounting it on a rotor stem in a manner which reduces the probability of the target cracking when it is subjected to high magnitude thermal and rotational shocks. The graphite disk has a counterbore in its front and rear faces which are connected with a smaller central bore so the counterbores define annular shoulders. A washer having a slot which serves as a keyway is brazed concentrically onto the shoulder of the front counterbore. The rotor stem has a threaded end which registers complementarily in the slot to effect a driving connection and the stem has a radially extending shoulder which interfaces with the shoulder in the rear counterbore. A nut on the threaded stem end secures the target to the stem.

Attachment means for a graphite x-ray tube target

A high thermal emittance coating for an X-ray tube anode target comprises a high melting point oxide or a mixture of such oxides added to titanium dioxide and another oxide selected from the group consisting of calcium oxide and yttrium oxide.

High thermal emittance coating for X-ray targets

The glass envelope of a rotating anode x-ray tube has a tubular stem sealed into it. A rotor shaft which supports the x-ray target and induction rotor is coaxial with the tubular stem. The front ball bearing for the shaft has its outer race fixed in the end of the tubular stem and its inner race fixed on the shaft. The rear bearing has its inner race fixed on the shaft and its outer race fixed in a bearing retainer sleeve which is axially yieldable in the tubular stem. A coil spring is interposed between one end of the stem and the bearing retainer sleeve to force the outer race, balls and inner race of the bearings into good electric current exchange contact during rotor operation and to accommodate thermal expansion.

Preloaded bearing assembly for rotating anode X-ray tubes

An anode assembly for a stationary anode x-ray tube wherein a tungsten target insert and an anode supporting metal sleeve are brazed simultaneously to the anode body. An axially tapered metal ferrule having a larger diameter than the sleeve is sealed into the end of a cylindrical glass envelope and the sleeve is inserted concentrically into the smaller end of the ferrule. The joint at the coterminous outside ends of the sleeve and ferrule is welded so as to seal and support the anode assembly in the tube envelope.

Robert E. Hueschen

Papers

Attachment means for a graphite x-ray tube target

High thermal emittance coating for X-ray targets

Preloaded bearing assembly for rotating anode X-ray tubes

Method of making stationary anode x-ray tube with brazed anode assembly

Triggered spark gap