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Al-Mg alloy porous material and preparation method thereof

A technology of porous materials and metal materials, which is applied in the field of Al-Mg alloy porous materials and its preparation, can solve the problems that the research of porous materials has not been paid attention to, and achieve excellent chloride corrosion resistance, high open porosity, and abundant connected pores Effect

Inactive Publication Date: 2015-12-30
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the research on Al-Mg intermetallic compounds is mainly focused on their use as structural materials for the automotive industry and surface corrosion protection coatings for magnesium alloys, but research on porous materials has not received much attention

Method used

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  • Al-Mg alloy porous material and preparation method thereof
  • Al-Mg alloy porous material and preparation method thereof
  • Al-Mg alloy porous material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Mix Al powder with a particle size of 100-150 mesh and Mg powder with a particle size of 100-150 mesh for 10 hours at a mass ratio of 6.25:3.75; press-form the mixed powder of the above-mentioned Al powder and Mg powder, Hold the pressure for 90 seconds under a molding pressure of 50MPa, and obtain a compact after pressing; place the compact in a vacuum sintering furnace for sintering, and the vacuum degree is 10 -3 Pa, the sintering process consists of three stages: the first stage, the sintering temperature is raised from room temperature to 120°C, the heating rate is controlled at 10°C / min, and the temperature is kept at 120°C for 30min; the second stage, the sintering temperature is raised to 350°C ℃, the heating rate is controlled at 10 °C / min, and the temperature is kept at 350 °C for 90 min; in the third stage, the sintering temperature is raised to 435 °C, the heating rate is controlled at 5 °C / min, and the temperature is kept at 435 °C for 240 min; after sinteri...

Embodiment 2

[0029] Mix Al powder with a particle size of 100-150 mesh and Mg powder with a particle size of 100-150 mesh at a mass ratio of 4.4:5.6 for 10 hours; press-form the mixed powder of the above-mentioned Al powder and Mg powder, Hold the pressure for 90 seconds under a molding pressure of 50MPa, and obtain a compact after pressing; place the compact in a vacuum sintering furnace for sintering, and the vacuum degree is 10 -3 Pa, the sintering process consists of three stages: the first stage, the sintering temperature is raised from room temperature to 120°C, the heating rate is controlled at 10°C / min, and the temperature is kept at 120°C for 30min; the second stage, the sintering temperature is raised to 350°C ℃, the heating rate is controlled at 10 °C / min, and the temperature is kept at 350 °C for 90 min; in the third stage, the sintering temperature is raised to 435 °C, the heating rate is controlled at 5 °C / min, and the temperature is kept at 435 °C for 240 min; after sintering...

Embodiment 3

[0031] Mix Al powder with a particle size of 200-250 mesh and Mg powder with a particle size of 200-250 mesh at a mass ratio of 6.25:3.75 for 10 hours; press-form the mixed powder of the above-mentioned Al powder and Mg powder, Hold the pressure for 90 seconds under a molding pressure of 50MPa, and obtain a compact after pressing; place the compact in a vacuum sintering furnace for sintering, and the vacuum degree is 10 -3 Pa, the sintering process consists of three stages: the first stage, the sintering temperature is raised from room temperature to 120°C, the heating rate is controlled at 10°C / min, and the temperature is kept at 120°C for 30min; the second stage, the sintering temperature is raised to 350°C ℃, the heating rate is controlled at 10°C / min, and kept at 350°C for 60 minutes; in the third stage, the sintering temperature is raised to 425°C, the heating rate is controlled at 5°C / min, and kept at 425°C for 210 minutes; after sintering The sintered Al-Mg alloy porous...

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Abstract

The invention discloses an Al-Mg alloy porous material and a preparation method thereof. The Al-Mg alloy porous material is formed through sintering of an Al metal material and an Mg metal material, wherein the weight of Al accounts for 30%-70% of the weight of the material, and the balance is Mg. The material comprises one or more of four phases including alpha (Al), beta (Al3Mg2), gamma (Al12Mg17) and delta (Mg). The preparation method comprises main steps: firstly, 30%-70% of Al powder with grain sizes of 100-300 meshes and the balance of Mg powder with grain sizes of 100-300 meshes are mixed for 10 hours; the mixed powder of the Al powder and the Mg powder is subjected to pressure forming and kept at the forming pressure of 30-150 MPa for 20-120 seconds, and a pressed blank is obtained through pressing forming; finally, the pressed blank is placed in a vacuum sintering furnace to be sintered, and the vacuum degree is 1-10<-3> Pa. The alloy porous material has higher strength and excellent chloride corrosion resistance and has higher porosity and rich communication pores.

Description

technical field [0001] The invention belongs to the technical field of inorganic porous materials, and in particular relates to an Al-Mg alloy porous material prepared by a powder metallurgy method and a preparation method thereof. Background technique [0002] Inorganic porous materials include ceramic porous materials and metal porous materials, which are mainly used in filtration, throttling, heat insulation, sound insulation, catalysis and other fields. Ceramic porous materials have excellent properties such as high temperature resistance and corrosion resistance, and are widely used in chemical and petrochemical industries. However, the brittleness, difficulty in welding and poor sealing of ceramic materials restrict the expansion of their application fields; Mechanical properties and welding sealing performance, but the acid and alkali corrosion resistance and high temperature oxidation resistance of metal materials are poor, and it is difficult to apply to high temper...

Claims

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Application Information

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IPC IPC(8): C22C21/06C22C23/02C22C30/00C22C1/08
Inventor 肖逸锋何文远曾凡检吴靓许艳飞刘艳汤智
Owner XIANGTAN UNIV
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