A kind of preparation method of microporous, high-porosity nickel-chromium-molybdenum porous material

A porous material and high porosity technology, applied in the field of porous metal material development, can solve the problems of small porosity, reduced temperature and corrosion resistance of nickel-based metal porous materials, and difficulty in meeting performance requirements, and achieves small pore size and high use. Harsh environmental conditions, easy and convenient removal

Active Publication Date: 2017-12-01
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned process is helpful to improve the performance of nickel-based metal porous materials, the following defects still exist: when the porosity of the porous material can reach 80-98%, its pore diameter is often greater than 0.1 mm; other prepared nickel-based metal porous materials When the average pore size of the material is close to 2 microns, its porosity is less than 60%
Therefore, it is difficult to realize high porosity (greater than 70%) and micropore diameter (less than 2 microns) at the same time for most existing nickel-based metal porous materials.
At the same time, as the pore size becomes smaller, the specific surface is richer and the surface activity is higher, the temperature and corrosion resistance of nickel-based metal porous materials will also decrease, making it difficult to meet the performance requirements under harsh conditions.

Method used

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  • A kind of preparation method of microporous, high-porosity nickel-chromium-molybdenum porous material
  • A kind of preparation method of microporous, high-porosity nickel-chromium-molybdenum porous material
  • A kind of preparation method of microporous, high-porosity nickel-chromium-molybdenum porous material

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Effect test

Embodiment 1

[0033] A nickel-chromium-molybdenum porous material with micropore size and high porosity was prepared, including: 40 nickel powder, 12 chromium powder, 4 molybdenum powder, 40 potassium phosphate, and 4 paraffin powder.

[0034]The preparation process includes the following steps: putting the weighed nickel powder, chromium powder and molybdenum powder into a ball mill container, putting hard alloy balls as ball mills, adding ethanol as a dispersion medium, and making the solvent and The material is fully wetted, according to the process parameters: the ratio of ball to material is 12:1, the speed is 220 rpm, and the time is 36 hours to obtain a uniform mixture with an average particle size of 3-4μm; the mixture is dried in a drying oven at 50°C for 3 hours Dry to obtain a fully dried nickel-chromium-molybdenum mixture. Add materials potassium phosphate powder 40 and paraffin powder 4 into the dry nickel-chromium-molybdenum mixture, put them into the ball mill container, put ...

Embodiment 2

[0037] A nickel-chromium-molybdenum porous material with micropore size and high porosity was prepared, including: 44 nickel powders, 12 chromium powders, 5 molybdenum powders, 36 potassium phosphates, and 3 paraffin powders.

[0038] The preparation process includes the following steps: putting the weighed nickel powder, chromium powder and molybdenum powder into a ball mill container, putting hard alloy balls as ball mills, adding ethanol as a dispersion medium, and making the solvent and The material is fully wetted, according to the process parameters: the ratio of ball to material is 15:1, the rotation speed is 240 rpm, and the time is 48 hours, to obtain a uniform mixture with an average particle size of 1-2 μm; the mixture is dried in a drying oven at 60°C for 4 hours Dry to obtain a fully dried nickel-chromium-molybdenum mixture. Add materials potassium phosphate powder 36 and paraffin powder 3 into the dry nickel-chromium-molybdenum mixture, put them into a ball mill ...

Embodiment 3

[0041] A nickel-chromium-molybdenum porous material with micropore size and high porosity was prepared, including: nickel powder 47, chromium powder 14, molybdenum powder 7, potassium phosphate 30, and paraffin powder 2.

[0042] The preparation process includes the following steps: putting the weighed nickel powder, chromium powder and molybdenum powder into a ball mill container, putting hard alloy balls as ball mills, adding ethanol as a dispersion medium, and making the solvent and The material is fully wetted, according to the process parameters: the ratio of ball to material is 10:1, the speed is 180 rpm, and the time is 24 hours, to obtain a uniform mixture with an average particle size of 4-5μm; the mixture is dried in a drying oven at 40°C for 2 hours Dry to obtain a fully dried nickel-chromium-molybdenum mixture. Add materials potassium phosphate powder 30 and paraffin powder 2 to the dry nickel-chromium-molybdenum mixture, put them into the ball mill container, put ...

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Abstract

The invention discloses a preparation method for a micro-pore-diameter high-porosity nickel-chrome-molybdenum porous material. According to the nickel-chrome-molybdenum porous material designed and prepared through the preparation method, the average pore diameter is 1-2 [mu]m, the porosity is larger than 70%, the permeability is larger than 2*10<-13> m<2>, and the compressive strength is larger than or equal to 30 MPa. The preparation method for the micro-pore-diameter high-porosity nickel-chrome-molybdenum porous material comprises the step of material preparation, the material comprises, by weight, 40%-50% of nickel powder, 12%-18% of chrome powder, 4%-7% of molybdenum powder, 30%-40% of potassium phosphate powder and 2%-4% of paraffin powder, specifically, firstly, nickel, chrome and molybdenum mixed powder is prepared through a ball milling method, added with the potassium phosphate powder and the paraffin powder and then uniformly mixed through ball milling; secondly, a sintered blank body is obtained through pressing sintering; and finally, the nickel-chrome-molybdenum porous material is obtained through pore forming. Compared with other metal porous materials prepared through existing powder metallurgy methods, the nickel-chrome-molybdenum porous material prepared through the preparation method has the characteristics of being small in pore diameter, high in porosity, permeability and mechanical property and excellent in temperature resistance and corrosion resistance and can meet the using requirements for severe conditions.

Description

technical field [0001] The invention relates to a method for preparing a nickel-chromium-molybdenum porous material with micropore diameter and high porosity, and belongs to the technical field of porous metal material development. Background technique [0002] Porous metal materials have obvious pore characteristics, can be welded and processed, and are impact-resistant. They are widely used in gas / liquid filtration, high-temperature gas purification filtration, molten metal filtration, solid catalysis, heat exchange, etc. in chemical industry, metallurgy, environmental protection, aerospace, etc. industrial field. Generally speaking, the smaller the pore size and the higher the porosity of the porous material, the richer the specific surface inside the material, and the better the functional effect produced. [0003] Changing material properties and pore-forming methods can improve the performance of porous metal materials, and nickel-based porous materials are a kind of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C22C19/05B22F3/11B22F9/04
CPCB22F3/1134B22F9/04B22F2009/043C22C1/08C22C19/053C22C19/055C22C19/056
Inventor 刘如铁陈洁熊翔梁雅儒何达
Owner CENT SOUTH UNIV
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