U.S. Philips Corporation

Frederik Magendans

Bernhard J Van Rheenen

Gerhardus A Te Raa

Horst H Hubner

Gerhardus Albertus Te Raa

A layer of W or of a W-alloy is provided on a forged supporting member of an X-ray rotary anode by plasma spraying. By carrying out the plasma spraying at reduced pressure, a layer is obtained which is suitable as a target layer for X-ray rotary anodes.

Method of manufacturing a rotary anode for X-ray tubes and anode thus

The invention relates to anodes for X-ray tubes and a method of producing same. Several layers are deposited one after another onto a substrate by means of chemical vapour deposition. The proposed combination of layers results in a proper bond to the substrate. The combination comprises a first layer of molybdenum or a molybdenum alloy; a second layer of a tungsten-molybdenum alloy and a third layer of tungsten or a tungsten alloy. The composition of the second layer varies over its thickness.

Method of producing an anode and anode thus obtained

A laminated rotary anode for use in an X-ray tube is provided having a structure of a first electron target layer being essentially of a first tungsten alloy, a second intermediate layer bonded to the electron target layer and consisting essentially of either tungsten or a second alloy of tungsten and having a yield point lower than that of the first tungsten alloy, and a support layer bonded at a face of the second layer with the support layer consisting essentially of one of molybdenum and molybdenum alloy.

Laminated rotary anode for X-ray tube

In an X-ray tube rotary anode having a supporting body (1) of molybdenum alloy, a target (2) of tungsten alloy, and a rough tungsten layer, applied by flame spraying to the whole surface of the anode except the focal path (4), for improving heat radiation, the rough tungsten layer does not adhere well to the tungsten alloy target, and particles of the rough tungsten layer may become detached in use, degrading the performance of the X-ray tube. To alleviate this problem, the whole surface of the anode, except the focal path (4), is blasted with steel grit, steel grit particles embedded in the anode are removed with acid, and the whole surface of the anode, except the target (2), is coated with a rough tungsten layer (3) by plasma spraying.

Method of improving the heat radiation properties of an X-ray tube

Method of manufacturing laminated rotary anodes for use in x-ray tubes in which in a first step a laminated disc-shaped member is jointed by a single blow to another disc-shaped member, the diameters of the members being increased and their thicknesses decreased. The rotary anode is made from the resulting assembly. The laminated disc-shaped assembly consists at the target area, for example of a tungsten-rhenium alloy and at the other surface of tungsten or an alloy between capable of being shaped than the first mentioned tungsten-rhenium alloy.

Method of manufacturing a laminated rotary anode for use in an x-ray tube

A rotary anode for an X-ray tube in which the surface remote from the electron target area is covered with a metal oxide coating comprising at least 94 percent by weight Al.sub.2 O.sub.3 and at least 2 percent by weight TiO.sub.2.

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Eindhoven, Netherlands

Frederik Magendans