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Preparing method of WMo mineral carbon composited anode target material for X ray tube with great power

A composite anode and high-power technology, applied in X-ray tube electrodes, X-ray tube parts, X-ray equipment, etc., can solve the problem of low heat dissipation efficiency, and achieve the effect of strong heat dissipation capacity, high density, and high melting point

Active Publication Date: 2008-10-22
JIANGSU JINSHENGYUAN SPECIAL VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the condition of alternating heat load, the anode target mainly relies on heat radiation to dissipate heat, and the heat dissipation efficiency is low. As a result, the temperature of the entire anode target body can exceed 1300°C under continuous load.

Method used

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  • Preparing method of WMo mineral carbon composited anode target material for X ray tube with great power

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Prepare a W / Mo / graphite composite target with a diameter of 20mm and a height of 48mm, in which the thickness of the tungsten layer is 2mm, the thickness of the molybdenum layer is 6mm, and the thickness of the graphite layer is 40mm (including a bonding layer thickness of 0.1mm).

[0051] According to the formula m=ρπr 2 h, respectively calculate the mass of tungsten powder and molybdenum powder. Take 16.16 grams of tungsten powder with a purity of 99.5% and a particle size of 1 μm to 6 μm, calculate and take 0.10 ml of glycerol of analytical purity according to the mass volume ratio of tungsten powder 5ml / kg, and put the above raw materials into the mixer Within 6 hours, after mixing evenly, sieve with a 40-mesh sieve to obtain tungsten powder. Take 19.26 grams of molybdenum powder with a purity of 99.5% and a particle size of 1 μm to 6 μm, calculate and take 0.08 ml of glycerol with analytical purity according to the mass volume ratio of 5 ml / kg to the molybdenum po...

Embodiment 2

[0053] Prepare a W / Mo / graphite composite anode target with a diameter of 60mm and a height of 40mm, wherein the thickness of the tungsten layer is 1.5mm, the thickness of the molybdenum layer is 5.5mm, and the thickness of the graphite layer is 33mm (including the bonding layer thickness of 0.1mm) .

[0054] According to the formula m=ρπr 2 h, respectively calculate the mass of tungsten powder and molybdenum powder. Take 81.86 grams of tungsten powder with a purity of 99.7% and a particle size of 1 μm to 6 μm, calculate and take 0.41 ml of glycerol with analytical purity according to the mass volume ratio of tungsten powder at 5 ml / kg, and put the above raw materials into the mixer After mixing for 8 hours, sieve with a 50-mesh sieve to obtain tungsten powder. Take 158.93 grams of molybdenum powder with a purity of 99.7% and a particle size of 1 μm to 6 μm, calculate and take 0.80 ml of glycerol of analytical purity according to the mass-volume ratio of molybdenum powder 5ml...

Embodiment 3

[0056] Prepare a W / Mo / graphite composite anode target with a diameter of 100mm and a height of 60mm, in which the thickness of the tungsten layer is 2mm, the thickness of the molybdenum layer is 6mm, and the thickness of the graphite layer is 52mm (including a bonding layer thickness of 0.1mm).

[0057] According to the formula m=ρπr 2 h, respectively calculate the mass of tungsten powder and molybdenum powder. Take 303.17 grams of tungsten powder with a purity of 99.8% and a particle size of 1 μm to 6 μm, calculate and take 1.51 ml of glycerol of analytical purity according to the mass volume ratio of tungsten powder and 5 ml / kg, and put the above raw materials into the mixer Within 9 hours, after mixing evenly, sieve with a 55-mesh sieve to obtain tungsten powder. Take 481.61 grams of molybdenum powder with a purity of 99.8% and a particle size of 1 μm to 6 μm, calculate and take 2.4 ml of glycerol with analytical purity according to the mass-volume ratio of the molybdenum ...

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Abstract

The invention discloses a method for preparing a WMo graphite composite rotating-anode target material used for a large-power X-ray tube. Tungsten powder, molybdenum powder and adhesive with the certain mass are subject to the cold press to form a composite green compact, isostatic pressing formed graphites with the same diameter and the composite green compact are orderly placed into a graphite mold, a bonding layer of the composite green compact contacts the graphites, the mixture is placed into a vacuum hot pressure sintering furnace to perform hot pressure sintering molding, a sintered W / Mo / graphite composite material is implemented with dynamic balance adjustment and is subject to the cutting process, and the W / Mo / graphite composite target material can be obtained. A ply laminating technology is adopted to obtain a tungsten-molybdenum composite layer which has thin tungsten layers and thick molybdenum layers and has even and consistent density distribution, and a braze welding technology and a diffusion welding technology are combined to obtain the connection of metal molybdenum and the high-performance graphites by adding a transition layer. The method effectively solves the problem of premature failure of an anode target material caused by bad heat dissipation in the vacuum environment and under the using condition of alternating thermal load, and improves the service life of the anode target material.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and relates to the preparation of a refractory metal-based composite material and a new medical material, in particular to a preparation method of a WMo graphite composite anode target material for a high-power X-ray tube used in a medical CT machine. Background technique [0002] When the X-ray tube of medical CT machine is working, when the anode target in the vacuum environment is bombarded by electrons to generate X-rays, more than 98% of the energy is converted into heat energy, and the heat energy is concentrated on the anode. Under the condition of alternating heat load, the anode target mainly relies on heat radiation to dissipate heat, and the heat dissipation efficiency is low. As a result, the temperature of the entire anode target body can exceed 1300°C under continuous load. [0003] For the anode target bombarded by high-speed energetic particles in the X-ray tube of high-...

Claims

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Application Information

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IPC IPC(8): H01J9/02H01J35/08H05G1/02A61B6/03
Inventor 陈文革高丽娜
Owner JIANGSU JINSHENGYUAN SPECIAL VALVE
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