Preparation method for uranium molybdenum alloy powder

A technology of molybdenum alloy and powder, which is applied in the field of nuclear material preparation, can solve the problems of unclear mechanism and poor hydrogen absorption effect, and achieve the effect of reducing cost, reducing production cycle and reducing production cost

Active Publication Date: 2013-04-03
SICHUAN INST OF MATERIALS & TECH
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AI Technical Summary

Problems solved by technology

This process ensures that the alloy bulk can be hydrogenated uniformly, but the mechanism is still unclear
The residual stress from the casting process has a great influence on this process, especially in the case of compressive stress on the surface, the hydrogen absorption effect is not good

Method used

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Embodiment Construction

[0025] The preparation method of the uranium-molybdenum alloy powder of the present invention mainly follows the following four steps in the cleaning process: 1) Put the uranium-molybdenum alloy sample in the mixed solution of concentrated nitric acid and concentrated hydrochloric acid (volume ratio 1:3), the purpose of which is to It is to remove the oxide layer on the surface. This step is more critical and directly affects the cleaning quality of the uranium-molybdenum alloy sample, and also affects whether the uranium-molybdenum alloy can absorb hydrogen for activation in the subsequent process; 2) Put the uranium-molybdenum alloy sample after pickling in distilled water 3) Put the deacidified uranium-molybdenum alloy sample in anhydrous ether to remove the surface moisture; The molybdenum alloy sample was placed in absolute ethanol, the purpose of which was to remove the oil on the surface; 5) Under the protection of Ar gas, the uranium-molybdenum alloy sample after deacid...

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Abstract

The invention provides a method for preparing uranium-molybdenum alloy powder, which is used for preparing uranium-molybdenum alloy powder meeting certain particle size requirements, and belongs to the field of nuclear technology application. The preparation method of the invention mainly includes cleaning and activation of the uranium-molybdenum alloy before activation. Cleaning with aqua regia, distilled water, anhydrous ether, and ethanol can effectively remove the oxide layer on the surface of the uranium-molybdenum alloy, so that the uranium-molybdenum alloy has a clean surface before hydrogen absorption; through effective control of the activation process parameters, the uranium-molybdenum alloy can be realized Accurate control of powder particle size. The method for preparing the uranium-molybdenum alloy powder of the invention has the characteristics of few steps, simple process, small investment, etc., and is suitable for popularization in the field of nuclear fuel cycle.

Description

technical field [0001] The invention belongs to the technical field of nuclear material preparation, and in particular relates to a method for preparing uranium-molybdenum alloy powder. The invention is used to prepare uranium-molybdenum alloy powder required for the preparation of mixed reactor porous uranium-molybdenum alloy fuel elements and meeting certain particle size requirements. body. Background technique [0002] Today, as natural fossil energy is increasingly depleted, nuclear energy occupies an increasingly important position. The use technology of fission nuclear fuel is quite mature now, among which the nuclear fuel based on uranium element is the most widely used. However, ordinary metal uranium is in the α phase below 668°C, and its corrosion resistance and radiation resistance are very poor. In order to improve the radiation stability of fuel, a small amount of alloying elements are usually added to metal uranium to form uranium alloy as fuel material. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/04G21C3/60
CPCY02E30/30
Inventor 熊义富陈长安张鹏程陈淼敬文勇吴文清
Owner SICHUAN INST OF MATERIALS & TECH
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