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Method for preparing Fe3Al-Al2O3 composite material

A composite material and mechanical alloying technology, applied in the field of Fe3Al intermetallic compound matrix composite material preparation, can solve the problems of material density and microhardness decrease, achieve uniform distribution, solve room temperature brittleness, and uniform density performance.

Inactive Publication Date: 2011-04-20
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-purity and Al 2 o 3 Fine-grained Fe with a mass fraction of 15-44% 3 Al-Al 2 o 3 Preparation method of composite material using self-propagating reaction to generate Al in mechanical alloying process 2 o 3 , and then obtain the composite material by plasma activation sintering to solve the existing process of adding Al 2 o 3 Defects that reduce material density and microhardness when the content is too large

Method used

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  • Method for preparing Fe3Al-Al2O3 composite material
  • Method for preparing Fe3Al-Al2O3 composite material
  • Method for preparing Fe3Al-Al2O3 composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0023] According to the mass fraction of raw materials: Fe 2 o 3 69.0%, Al31.0% weigh Fe with a purity of 99% 2 o 3 Put 27.6g of powder and 12.4g of Al powder with a purity of 99% into a stainless steel ball mill tank, add 400g of stainless steel balls with a diameter of 10mm, seal the ball mill with an O-ring before the ball mill, and then vacuumize the ball mill tank and fill it with argon. At a speed of 250r·min -1 And ball milling time is to carry out mixed ball milling under 60h, the obtained mixture powder composition is (mass percentage): Al 2 o 3 44%, Fe(Al) solid solution 56%. from figure 1 It can be seen that the obtained Fe-Al solid solution and Al 2 o 3 The mixed powder is a homogeneous mixture.

[0024]Weigh 30 g of the mixture powder prepared in Example 1, put it into a high-strength graphite mold, and sinter in a plasma-activated sintering furnace (Ed-PAS-III) produced by Sumitomo Carboniferous Mining Co., Ltd., Japan. The main sintering process para...

Embodiment 2

[0027] According to the mass fraction of raw materials: Fe 2 o 3 47.1%, Al 25.6% and Fe 27.3% weigh Fe with a purity of 99% 2 o 3 Put 18.8g of Al powder with a purity of 99%, 10.3g of Al powder with a purity of 99%, and 10.9g of Fe powder with a purity of 99% into a stainless steel ball mill jar, add 400g of stainless steel balls with a diameter of 10mm, and seal the ball with an O-ring before the ball mill. The tank is evacuated and filled with argon at a speed of 250r min -1 And ball milling time is to carry out mixed ball milling under 55h, the obtained mixture powder composition is (mass percentage): Al 2 o 3 30%, Fe(Al) solid solution 70%.

[0028] Weigh 30 g of the mixture powder prepared in Example 2, put it into a high-strength graphite mold, and sinter in a plasma-activated sintering furnace (Ed-PAS-III) produced by Sumitomo Carboniferous Mining Co., Ltd., Japan. The main sintering process parameters are: sintering pressure 30MPa, vacuum degree 15Pa, plasma ac...

Embodiment 3

[0030] According to the mass fraction of raw materials: Fe 2 o 3 31.5%, Al 21.5% and Fe 47.0% weigh Fe with a purity of 99% 2 o 3 Put 12.6g of powder, 8.6g of Al powder with a purity of 99%, and 18.8g of Fe powder with a purity of 99% into a stainless steel ball mill tank, add 400g of stainless steel balls with a diameter of 10mm, and seal them with an O-ring before ball milling. The tank is evacuated and filled with argon at a speed of 250r min -1 And ball milling time is to carry out mixed ball milling under 55h, the obtained mixture powder composition is (mass percentage): Al 2 o 3 20%, Fe(Al) solid solution 80%. from image 3 It can be seen that the obtained Fe-Al solid solution and Al 2 o 3 The mixed powder is a homogeneous mixture.

[0031] Weigh 30 g of the mixture powder prepared in Example 2, put it into a high-strength graphite mold, and sinter in a plasma-activated sintering furnace (Ed-PAS-III) produced by Sumitomo Carboniferous Mining Co., Ltd., Japan. ...

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Abstract

The invention discloses a method for preparing a Fe3Al-Al2O3 composite material. The method comprises the following steps of: (1) weighing 23 to 69 mass percent of Fe2O3 powder, 21 to 31 mass percent of Al powder and 0 to 57 mass percent of Fe powder and performing mechanical alloying; (2) controlling a mechanical alloying process, performing self-propagation reaction on the Fe2O3 powder and the Al powder to produce Al2O3 and Fe powder, wherein the Fe powder and the Al powder form Fe(Al) solid solution in the ball milling process so as to obtain a mixture of the Al2O3 and the Fe(Al) solid solution; and (3) filling the mechanically alloyed and ball-milled mixture of the Al2O3 and the Fe(Al) solid solution into a graphite mould, and performing plasma activated sintering to form the required blocky composite material. By the preparation method, the aplitic Fe3Al-Al2O3 composite material with 15 to 44 mass percent of Al2O3 can be obtained; and the method is a preparation method for mechanical alloying and plasma sintering of the Fe3Al-Al2O3 composite material, which has the advantages of short preparation process time, high product purity and compactness and low cost.

Description

technical field [0001] The present invention relates to a kind of Fe 3 Preparation method of Al intermetallic compound matrix composite material, specifically relates to a kind of mechanical alloying-plasma activation sintering forming to prepare Fe 3 Al-Al 2 o 3 Composite approach. Background technique [0002] Fe 3 Al intermetallic compounds are known as "the poor man's stainless steel" because of their excellent high-temperature corrosion resistance and the absence of precious metal elements. However Fe 3 The low tensile plasticity and poor processability of Al intermetallic compounds at room temperature limit their large-scale application as structural materials in industrial production. From the perspective of expanding the application field of intermetallic compounds, under the wear condition where the load is compressive stress, the tensile plasticity of the material becomes a secondary performance index compared with the hardness, toughness and work hardening a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C22C33/02C22C32/00
Inventor 邢建东白亚平王建吴昊亮
Owner XI AN JIAOTONG UNIV
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