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Preparation method of alloy powder material

A technology of solid materials and alloy powder, which is applied in the field of preparation of alloy powder materials, can solve the problems of complex process, high cost and low production efficiency, and achieve good application prospects, simple operation and low cost

Active Publication Date: 2020-11-17
赵远云
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 th

Method used

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  • Preparation method of alloy powder material
  • Preparation method of alloy powder material
  • Preparation method of alloy powder material

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preparation example Construction

[0027] The preparation method of the alloy powder material provided by the invention comprises the following steps:

[0028] S1, providing (M x T y ) a RE b Alloy, wherein, M is selected from at least one of Fe, Co, Ni, T is selected from at least one of W, Cr, Mo, V, Ta, Nb, Zr, Hf, Ti, RE is selected from Y, La , Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu at least one, x, y and a, b represent the atomic percentage content of the corresponding composition, respectively, And 33%≤x≤75%, x+y=100%; 0.1%≤a≤40%, a+b=100%, said (MxTy) a RE b The solidification structure of the alloy is composed of M x T y The dispersed particle phase and the matrix phase mainly composed of RE;

[0029] S2, the (M x T y ) a RE b The alloy is mixed with the acid solution, so that the matrix phase reacts with the acid solution to become ions into the solution, and the dispersed particle phase is separated, that is, the M x T y Composed of alloy powder materials.

[0030] In s...

Embodiment 1

[0050] This embodiment provides a preparation method of micron-sized CoTi powder, comprising the following steps:

[0051] (1) The molecular formula of the selected formula is (Co 50 Ti 50 ) 25 Gd 75 alloy, according to the formula to weigh raw materials, in 10 -2 Fully smelted under Pa vacuum (Co 50 Ti 50 ) 25 Gd 75 alloy, the alloy melt is poured into a copper mold with a cavity cross-sectional size of 4mm x 6mm, and cast at a cooling rate of about 75K / s to prepare a size of 4mm x 6mm x 30mm (Co 50 Ti 50 ) 25 Gd 75 The alloy thin plate, the alloy solidification structure includes dispersed dendrite particles composed of CoTi and a matrix phase composed of Gd, and the size range of the CoTi dendrite particles is 2 μm to 40 μm.

[0052] (2) At room temperature, 0.5 gram of (Co 50 Ti 50 ) 25 Gd 75 The alloy sheet was immersed in 300mL of dilute hydrochloric acid aqueous solution with a concentration of 0.2mol / L for reaction. During the reaction process, the matr...

Embodiment 2

[0056] This embodiment provides a method for preparing spherical micron-sized CoTi powder, comprising the following steps:

[0057] (1) The molecular formula of the selected formula is (Co 50 Ti 50 ) 25 Gd 75 alloy, according to the formula to weigh raw materials, in 10 -2 Fully smelted under Pa vacuum (Co 50 Ti 50 ) 25 Gd 75 alloy, the alloy melt is poured into a copper mold with a cavity cross-sectional size of 4mm x 6mm, and cast at a cooling rate of about 75K / s to prepare a size of 4mm x 6mm x 30mm (Co 50 Ti 50 ) 25 Gd 75 The alloy thin plate, the alloy solidification structure includes dispersed dendrite particles composed of CoTi and a matrix phase composed of Gd, and the size range of the CoTi dendrite particles is 2 μm to 40 μm.

[0058] (2) At room temperature, 0.5 gram of (Co 50 Ti 50 ) 25 Gd 75 The alloy sheet was immersed in 300mL of dilute hydrochloric acid aqueous solution with a concentration of 0.2mol / L for reaction. During the reaction process,...

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Abstract

The invention relates to a preparation method of an alloy powder material. By utilizing the characteristic that an alloy solidification structure contains a matrix phase and an inert dispersion particle phase, the matrix phase is removed through reaction of an acid solution, so that the dispersion particle phase is separated out, and the alloy powder material is obtained. The method is simple in process, can be used for preparing various alloy powder materials with different morphologies including nanoscale, submicron-scale, micron-scale and millimeter-scale alloy powder materials, and has good application prospects in the fields including 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 alloy powder materials. Background technique [0002] Alloy powders with micro-nano particle size, due to their special surface effect, quantum size effect, quantum tunneling effect and Coulomb blocking effect, etc., 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 alloy 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, alkoxide method, carbonyl me...

Claims

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Application Information

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IPC IPC(8): B22F9/16C22C3/00B22F1/00
CPCB22F9/16C22C3/005B22F1/00C22C3/00C22C28/00
Inventor 刘丽
Owner 赵远云
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