Composite powder and preparing method thereof

A technology of composite powder and mixed gas, applied in the direction of coating, etc., can solve the problems of poor bonding force between oxide and metal matrix, non-uniformity, non-dense, etc., and achieve the effect of dense structure, controllable thickness and high sphericity
CN103752822AInactive Publication Date: 2014-04-30XIHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIHUA UNIV
Publication Date
2014-04-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a composite powder and a preparing method thereof and belongs to the field of material engineering. The composite powder is prepared with the method which includes the following steps that metal or alloy is smelted to obtain metal liquid or alloy liquid; in the time of smelting, the degree of superheat is controlled between 50 DEG C and 200 DEG C and the metal liquid or the alloy liquid naturally flows downwards; meanwhile, blended gases are used for spraying and atomizing the metal liquid or the alloy liquid and the composite powder is obtained after cooling is carried out. The inner core and the shell of the powder obtained in the method can form metallurgical bonding, coverage is compact, bonding force is strong, texture is compact and the degree of sphericity is high. As no chemical agents do not need to be used in preparing, the environment will not be polluted; in addition, in the time of preparing, the thickness of the shell of an oxide can be controlled by controlling the oxygen concentration in the blended gases, the thickness is controllable, the technological process is stable and controllable and processing in a batched mode can be carried out with high efficiency.
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Description

technical field

[0001] The invention relates to the field of material engineering, in particular to a composite powder and a preparation method thereof. Background technique

[0002] Ultrafine powder usually refers to particles with a particle size of micron or even nanometer. Compared with bulk conventional materials, these particles have larger specific surface area, surface activity and higher surface energy, and usually exhibit special optical, electrical, magnetic and other physical properties. However, due to the unique small size effect and surface effect of ultrafine powder, it will cause agglomeration and dispersion problems, making it lose many excellent properties it should have. The solution is usually to modify the surface of the ultrafine powder to obtain new physical and chemical properties and even new functions on the surface of the particles.

[0003] Metal oxide coating modification is carried out on the surface of the ultrafine powder, that is, the core...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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