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Method for preparing FeAl intermetallic compound flexible film through activated sintering of pre-alloyed powder

A technology of intermetallic compounds and pre-alloyed powders, which is applied in the field of FeAl intermetallic compound flexible membranes prepared by activation and sintering of pre-alloyed powders, which can solve the problems of insufficient toughness and thermal shock resistance, high temperature resistance, and corrosion resistance of ceramic filter materials. Common tubular filter materials have problems such as large thickness, and achieve the effects of good high temperature oxidation resistance and corrosion resistance, good mechanical properties and fatigue resistance, and good powder composition uniformity.

Active Publication Date: 2020-11-17
向双清
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the lack of high temperature resistance and corrosion resistance of existing metal high-temperature filter materials, the lack of toughness and thermal shock resistance of ceramic filter materials, and the lack of ordinary pipes Due to the defects of large thickness of filter material and high filtration resistance, the present invention provides a method for preparing FeAl intermetallic compound flexible film by activation and sintering of pre-alloyed powder
[0007](2) Significantly improve the traditional FeAl pre-alloyed powder direct spraying and sintering problems of weak bonding and easy cracking between the film layer and the screen matrix

Method used

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  • Method for preparing FeAl intermetallic compound flexible film through activated sintering of pre-alloyed powder
  • Method for preparing FeAl intermetallic compound flexible film through activated sintering of pre-alloyed powder
  • Method for preparing FeAl intermetallic compound flexible film through activated sintering of pre-alloyed powder

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Embodiment 1

[0043] A method for preparing FeAl intermetallic compound flexible film by pre-alloy powder sintering method:

[0044] 1. Powder blending: add 5g of thermoplastic phenolic resin to 30mL of ethanol, then add 100g of FeAl aerosolized spherical alloy powder (in which the aluminum content is 10wt.%, and the balance is Fe), then add a sintering activator (calculated by element, Contains 0.5g of boron, added in the form of elemental boron and ferroboron powder); it is prepared into a uniform slurry of suspended particles by mechanical stirring.

[0045] 2. Ball milling: place the suspended particle slurry prepared in step 1 in a planetary ball mill for mechanical ball milling, the ball-to-material ratio is 3:1, and the ball milling time is 24 hours to obtain a uniform composite of activator and FeAl-based alloy powder. Irregular energy storage powder.

[0046] 3. Sizing: Spray a layer of uniform FeAl pre-alloyed powder composite slurry on the 310S stainless steel mesh (the mesh dia...

Embodiment 2

[0050] A method for preparing FeAl intermetallic compound flexible film by pre-alloy powder sintering method:

[0051] 1. Powder blending: add 8g of thermoplastic phenolic resin to 35mL of ethanol, then add 100g of FeAl aerosolized spherical alloy powder (wherein the aluminum content is 20wt.%, the balance is Fe), and then add a sintering activator (calculated by element, It contains 0.2g of boron, 0.3g of yttrium, and is added in the form of metal yttrium and yttrium boride); it is prepared into a uniform suspended particle slurry by mechanical stirring.

[0052] 2. Ball milling: place the suspended particle slurry prepared in step 1 in a planetary ball mill for mechanical ball milling, the ball-to-material ratio is 3:1, and the ball milling time is 30 hours to obtain a uniform composite of activator and FeAl-based alloy powder. Irregular energy storage powder.

[0053] 3. Sizing: Spray a layer of uniform FeAl pre-alloyed powder composite slurry on the 310S stainless steel m...

Embodiment 3

[0057] A method for preparing FeAl intermetallic compound flexible film by pre-alloy powder sintering method:

[0058] 1. Powder blending: add 10g of thermoplastic phenolic resin to 40mL of ethanol, then add 100g of FeAl aerosolized spherical alloy powder (wherein the aluminum content is 25wt.%, the balance is Fe), and then add a sintering activator (calculated by element, It contains 0.3g of boron and 0.3g of yttrium, added in the form of iron boron powder and yttrium boride); it is prepared into a uniform suspended particle slurry by mechanical stirring.

[0059] 2. Ball milling: Place the suspended particle slurry prepared in step 1 in a planetary ball mill for mechanical ball milling. The ball-to-material ratio is 3:1, and the ball milling time is 36 hours to obtain a uniform composite of activator and FeAl-based alloy powder. Irregular energy storage powder.

[0060] 3. Sizing: Spray a layer of uniform FeAl pre-alloyed powder composite slurry on the 310S stainless steel ...

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Abstract

The invention discloses a method for preparing a FeAl intermetallic compound flexible film through activated sintering of pre-alloyed powder. The method comprises the following steps: a, powder blending is conducted, specifically, gas-atomized FeAl-based alloy powder is added, then a wet grinding medium, an adhesive and a sintering activator are added, and uniform mixing is conducted to form powder slurry; b, ball milling is conducted, specifically, mechanical ball milling is conducted on the powder slurry; c, slurry coating is conducted, specifically, a 310S stainless steel wire mesh is takenas a base body, the ball-milled powder slurry is sprayed on the wire mesh for full drying, and a powder / wire mesh composite body is obtained; and d, sintering is conducted, specifically, the powder / wire mesh composite body is placed into a sintering furnace for low-temperature degreasing and high-temperature sintering, and then cooling is conducted, and the FeAl intermetallic compound flexible film is obtained. The prepared FeAl intermetallic compound flexible membrane is uniform in component, high in porosity, good in high-temperature-oxidation resistance and vulcanization resistance and meanwhile good in mechanical property and filtering property.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic porous membrane materials, and in particular relates to a method for preparing flexible membranes of FeAl intermetallic compounds by activating and sintering prealloyed powders. Background technique [0002] High-temperature filtration is to use the specific pore structure of membrane materials to filter and separate high-temperature gases. It has the advantages of high efficiency, energy saving, simplicity, and low pollution. It has been widely used in various industrial fields, especially for steel, coal chemical industry, thermal power, garbage, etc. Purification treatment of industrial high-temperature flue gas such as incineration. At present, high-temperature filter materials are mainly metal membrane materials and ceramic membrane materials. Among them, metal porous membrane materials have the disadvantages of high temperature resistance and poor corrosion resistance, while...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F3/10
CPCB22F9/04B22F3/1003B22F3/1007B22F2009/043
Inventor 唐伟力向双清
Owner 向双清
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