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Preparation of FeAl intermetallic compound porous material

A technology of intermetallic compounds and porous materials, which is applied in the field of preparation of FeAl intermetallic compound porous materials, can solve the problems of poor controllability of pore structure, small controllability of pore structure, high energy consumption of sintering, etc., and achieve good high temperature mechanical properties , Expand the scope of the use of the environment, the effect of a large control range

Active Publication Date: 2009-05-27
CHENGDU INTERMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods usually require pre-preparation of raw material powders. During the preparation process, high-temperature heating is used to remove a large amount of organic matter such as pre-added forming agents and pore-forming agents. The removal cycle is long and causes serious environmental pollution.
At the same time, the sintering energy consumption of ceramic porous materials is high, while the controllability of the pore structure of metal porous materials is poor
In particular, the preparation of porous materials by raw material powder metallurgy sintering is based on the pore formation of stacked powder gaps, the controllability of the pore structure is small, and the tortuosity factor is large.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 Preparation of FeAl intermetallic compound porous material by the method of the present invention

[0019] The ratio of Fe and Al element powders is Fe-30at% Al, and the particle size is selected as Fe powder with an average particle size of 100 μm and Al powder with an average particle size of 90 μm. After mechanical mixing, the flake blank is pressed under a pressure of 240 MPa by common molding method. Sintering is carried out in a vacuum atmosphere, and the vacuum degree is controlled at 1.0×10 -1 ~1.0×10 -2 Pa. First, sinter at 130°C for 45 minutes to remove the adsorbed moisture. Subsequently, medium-temperature solid phase diffusion was carried out at a temperature of 520° C. for 60 minutes. The final high-temperature component homogenization and structural stabilization treatment temperature is 1050° C., and the treatment time is 120 minutes to obtain a FeAl intermetallic compound porous support.

[0020] Select the proportion of Fe-30at% Al, the ...

Embodiment 2

[0023] Example 2 Preparation of FeAl intermetallic compound porous material by the method of the present invention

[0024] The ratio of Fe and Al element powders is Fe-60at% Al, and the particle size is selected as Fe powder with an average particle size of 5 μm and Al powder with an average particle size of 10 μm. After the mechanical mixing is uniform, it is pressed into a sheet blank under a pressure of 150 MPa by a common molding method. Sintering is carried out in a vacuum atmosphere, and the vacuum degree is controlled at 1.0 to 1.0×10 -1 Pa. First, heat at 150°C for 50 minutes; then, carry out medium-temperature solid phase diffusion at 560°C for 120 minutes. The final high-temperature component homogenization and tissue structure stabilization treatment temperature is 1100° C., and the time is 30 minutes. A FeAl intermetallic compound porous support is prepared.

[0025] Select the proportion of Fe-60at% Al, the average particle size of 1.0 μm Fe and Al ultrafine ...

Embodiment 3

[0028] Example 3 Preparation of FeAl intermetallic compound porous material by the method of the present invention

[0029] The proportion of Fe and Al element powders is Fe-40at% Al, and the particle size is selected as Fe powder with an average particle size of 40 μm and Al powder with an average particle size of 30 μm. After the mechanical mixing is uniform, it is pressed under a pressure of 180MPa by cold isostatic pressing, and the taper of the pressed core rod is 1.8o. After manual demoulding, a tubular shaped blank with a slightly tapered inner diameter is obtained. Sintering is carried out in a vacuum atmosphere, and the vacuum degree is controlled at 1.0×10 -1 ~1.0×10 -2 Pa. First, heat at 120°C for 30 minutes to remove the adsorbed water; then, carry out medium-temperature solid-phase diffusion at 600°C for 120 minutes. The final temperature of high-temperature component homogenization and structural stabilization treatment is 1200° C., and the time is 90 minutes....

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Abstract

The invention relates to a preparation method for FeAl intermetallic compound porous material, which belongs to the field of inorganic porous material. The technical problem solved by the invention is to provide the preparation method for the FeAl intermetallic compound porous material with a pore structure having higher controllability. The method comprises the following steps: firstly preparing a porous supporting body and composite slurry; then coating the surface of the porous supporting body with the composite slurry; and sintering and cooling down the porous supporting body in the vacuum atmosphere to obtain the FeAl intermetallic compound porous material. The method capable of regulating the porous structure of the porous material is characterized by a short flow, low cost and low energy consumption. The porous material has excellent resistance to high temperature sulfurization, resistance to high temperature oxidation and thermal shock, good mechanical performance at a high temperature, good processability and solderability, and the like. Therefore, the FeAl intermetallic compound porous material has bright application prospect.

Description

technical field [0001] The invention relates to a preparation method of a FeAl intermetallic compound porous material, belonging to the field of inorganic porous materials. Background technique [0002] Inorganic porous materials are mainly divided into two categories according to the type of material: ceramic porous materials, such as porous bodies of alumina, zirconia, silicon carbide and silicon dioxide; and metal porous materials, such as metal nickel, stainless steel, titanium, copper, etc. and porous bodies of materials such as aluminum. At present, the preparation methods of inorganic porous materials widely used in industry mainly include: powder metallurgy sintering method of raw material powder and synthesis method using organic matter such as polyurethane as template. These methods usually require pre-preparation of raw material powders. During the preparation process, high-temperature heating is used to remove a large amount of organic substances such as pre-add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G57/00C01G99/00
Inventor 高麟贺跃辉徐进辉汪涛
Owner CHENGDU INTERMENT TECH
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