Rotatable anode target for X-ray tube, X-ray tube, and X-ray inspection apparatus
AssigneesKabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.
InventorShinichi Yamamoto
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Abstract
A rotatable anode target for an X-ray tube (1) of the present invention includes a metallic disc (2) which includes a first crystal structure; a metallic cylinder (3) which is joined with the metallic disc and includes a second crystal structure, where a first average aspect ratio of first crystal grains positioning at a first region within 2 mm from an interface between the metallic disc and the metallic cylinder is less than 2, and a second average aspect ratio of second crystal grains positioning at a second region within 2 mm from the interface is 2 or more and 8 or less. It is thereby possible to provide an X-ray tube target which has high heat release performance and where thermal deformation is difficult to occur.
Claims15
A method of manufacturing a rotatable anode target for an X-ray tube, comprising:
- molding a first raw material powder containing at least one metal selected from the group consisting of molybdenum, tungsten, tantalum, niobium, and iron, or an alloy containing the at least one metal to form a first compact, sintering the first compact to form a sintered compact, and processing the sintered compact into a disc shape to form a metallic disc;
- forming an X-ray irradiator on the disc;
- molding a second raw material powder containing at least one metal selected from the group consisting of molybdenum, tungsten, tantalum, niobium, and iron, or an alloy containing the at least one metal of the second raw material powder to form a second compact and processing the second compact into a cylindrical shape to form a metallic cylinder;
- and
- joining the disc and the cylinder,
- wherein the disc has a plurality of first crystal grains in a first region within 2 mm from an interface between the disc and the cylinder, and the cylinder has a plurality of second crystal grains in a second region within 2 mm from the interface, and
- wherein a first average aspect ratio of the first crystal grains is 1.3 or more and 1.8 or less, and a second average aspect ratio of the second crystal grains is 2.4 or more and 6.5 or less.
Dependencies are inferred from the claim text.