Preparation method of metal powder materials

A technology of metal powder and powder materials, which is applied in the field of preparation of metal powder materials, can solve problems such as complex process, high cost, and difficult classification, and achieve the effects of simple operation, low cost, and good application prospects

Active Publication Date: 2020-08-28
赵远云
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the disadvantages of the liquid phase method are low yield, high cost and complicated process, etc.
The disadvantage of the mechanical method is that it is difficult to classify after the powder is prepared, and the purity, fineness and shape of the product are difficult to guarantee
Rotating electrode method and gas atomization method are currently the main methods for preparing high-performance metal and alloy powders, but the production efficiency is low, the yield of ultrafine powder is not high, and the energy consumption is relatively large; jet milling method, hydrogenation dehydrogenation method Suitable for large-scale industrial production, but has strong selectivity for raw metals and alloys

Method used

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preparation example Construction

[0027] The present invention provides a kind of preparation method of metal powder material, it comprises the following steps:

[0028] S1, providing an alloy sheet, wherein the composition of the alloy sheet is M a N b , M is selected from Mg, Ca, Li, Na, K, Ba, Al, Co, Cu, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, At least one of Yb and Lu, N selected from at least one of W, Cr, Mo, V, Ta, Nb, Zr, Hf, Ti, a and b represent the atomic percentage content of the corresponding constituent elements, and 0.1% ≤b≤45%, a+b=100%, the microstructure of the alloy sheet is composed of a matrix phase with a composition of M and a dispersed particle phase with a composition of N;

[0029] S2, reacting the alloy sheet with an acid solution, so that the matrix phase composed of M and the H of the acid solution + The reaction turns metal ions into the solution, and the dispersed particles whose composition is N are separated out, that is, the metal N powder material is obtain...

Embodiment 1

[0049] This embodiment provides a preparation method of submicron V powder, which preparation method comprises the following steps:

[0050] (1) The molecular formula of the selected formula is Ca 98.5 V 1.5 alloy, according to the formula to weigh the raw materials, after arc melting to get Ca 98.5 V 1.5 Alloy, the alloy is heated and remelted by an electric arc and then sucked into a copper mold (cooling rate is about 500K / s) to prepare Ca 98.5 V 1.5 alloy sheet. The alloy structure includes a matrix phase composed of Ca and a submicron (100nm-1μm) dispersed particle phase composed of V.

[0051] (2) At room temperature, 0.2 gram of Ca prepared in step (1) 98.5 V 1.5 The alloy sheet was submerged in 50 mL of sulfuric acid aqueous solution with a concentration of 0.1 mol / L for reaction. During the reaction process, the matrix composed of the active element Ca reacts with the acid and enters the solution, and the submicron-sized near-spherical V particles that do not r...

Embodiment 2

[0053] The present embodiment provides a kind of preparation method of submicron NbV alloy powder, and this preparation method comprises the following steps:

[0054] (1) The molecular formula of the selected formula is Y 98 (Nb 50 V 50 ) 2 Alloy, weigh the raw material according to the formula, and get Y after arc melting 98 (Nb 50 V 50 ) 2 Alloy, the alloy is remelted by arc heating and then sucked into a copper mold (cooling rate is about 500K / s) to prepare a Y with a size of 1mm×2mm×10mm 98 (Nb 50 V 50 ) 2 An alloy thin plate, the alloy structure includes a matrix composed of Y and a submicron (100nm-1μm) dispersed particle phase composed of NbV.

[0055] (2) At room temperature, 0.2 gram of Y prepared in step (1) 98 (Nb 50 V 50 ) 2 The alloy sheet was submerged in 50 mL of sulfuric acid aqueous solution with a concentration of 0.1 mol / L for reaction. During the reaction process, the matrix composed of active element Y reacts with the acid and enters the sol...

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Abstract

The invention relates to a preparation method of metal powder materials. An alloy sheet containing a matrix phase and a dispersion phase with different chemical reactivities is prepared through a rapid solidification technology of an alloy melt. Metal powder is prepared through reaction of the alloy sheet and an acid solution, and the detailed preparation method is shown in the specification. Themethod is simple in process, can be used for preparing various nano-scale, sub-micron-scale and micron-scale metal powder materials with different morphologies, and has a good application prospect inthe fields of catalysis, powder metallurgy, 3D printing and the like.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a method for preparing metal powder materials with micro-nano particle diameters. Background technique [0002] Due to the special surface effect, quantum size effect, quantum tunneling effect and Coulomb blocking effect, metal powders with micro-nano particle size exhibit many unique properties different from traditional materials in terms of optics, electricity, magnetism, and catalysis. , so it is widely used in optoelectronic devices, absorbing materials, high-efficiency catalysts and other fields. [0003] At present, the preparation methods of ultrafine metal powder are divided into solid phase method, liquid phase method and gas phase method according to the state of matter. Solid-phase methods mainly include mechanical pulverization, ultrasonic pulverization, thermal decomposition, explosion and so on. Liquid phase methods mainly include precipitation method, al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/16C22C3/00B22F1/05B22F1/065
CPCB22F9/16C22C3/005B22F1/05B22F1/065C22C3/00B22F9/30B22F2003/244B22F2999/00C22C1/0458B22F1/0545B22F1/056B22F1/142B22F2998/10B22F2202/13B22F2009/048B22F2009/165B22F2301/205
Inventor 刘丽
Owner 赵远云
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