A kind of alcrfenisiti high entropy alloy porous material and preparation method thereof

A technology of porous materials and high-entropy alloys, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of poor compaction performance, removal and emission, and high cost of pre-alloyed powders, and achieve good compaction performance, low cost, and low cost. cost effect

Active Publication Date: 2020-08-28
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the compaction performance of the pre-alloyed powder is poor, and a large amount of forming agent is often required to be added during the compaction process, resulting in the problem of a large amount of emission during the removal process
At the same time, in the process of preparing porous materials by this method, the formation of pores can only come from the interstitial space between powder particles, so it is often necessary to add pore-forming agents during the preparation process, and there is a problem of subsequent removal, which has a long process and higher cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Using Al, Cr, Fe, Ni, Si, Ti element powders as raw materials, according to the following composition ratio mixing (according to atomic percentage), Al: 14%, Cr: 18%, Fe: 20%, Ni: 19%, Si: 12%, Ti: 17%. The particle size range of Al and Ti is -200 mesh; the particle size range of Cr and Si is -325 mesh; the particle size range of Fe and Ni is -400 mesh. Put the main element powders into a V-type mixer for mixing, the mixing atmosphere is protected by inert gas, and the mixing time is 24 hours. Add stearic acid with a mass percentage of 2% in the mixed powder as a lubricant, and add it in the form of stearic acid alcohol solution. After adding, dry it in a vacuum oven at a drying temperature of 70° C. for 120 minutes. Compressed by molding, the pressure is 150MPa. Vacuum sintering is used for sintering, and four-stage sintering process is used for heating. The temperature in the first stage is 150°C, the holding time is 30 minutes, the heating rate is controlled at 20...

Embodiment 2

[0036] Using Al, Cr, Fe, Ni, Si, Ti element powders as raw materials, according to the following composition ratio mixing (according to atomic percentage), Al: 10%, Cr: 20%, Fe: 15%, Ni: 15%, Si: 20%, Ti: 20%. The particle size range of Al and Ti is -200 mesh; the particle size range of Cr and Si is -325 mesh; the particle size range of Fe and Ni is -400 mesh. Put the main element powders into a V-type mixer for mixing, the mixing atmosphere is protected by inert gas, and the mixing time is 24 hours. Add stearic acid with a mass percentage of 2% in the mixed powder as a lubricant, and add it in the form of stearic acid alcohol solution. After adding, dry it in a vacuum oven at a drying temperature of 70° C. for 120 minutes. Compressed by molding, the pressure is 150MPa. Vacuum sintering is used for sintering, and four-stage sintering process is used for heating. The temperature in the first stage is 150°C, the holding time is 30 minutes, the heating rate is controlled at 20...

Embodiment 3

[0038] Use Al, Cr, Fe, Ni, Si, Ti element powders as raw materials, mix according to the following composition ratio (according to atomic percentage), Al: 15%, Cr: 15%, Fe: 18%, Ni: 20%, Si: 15%, Ti: 17%. The particle size range of Al and Ti is -200 mesh; the particle size range of Cr and Si is -325 mesh; the particle size range of Fe and Ni is -400 mesh. Put the main element powders into a V-type mixer for mixing, the mixing atmosphere is protected by inert gas, and the mixing time is 24 hours. Add stearic acid with a mass percentage of 2% in the mixed powder as a lubricant, and add it in the form of stearic acid alcohol solution. After adding, dry it in a vacuum oven at a drying temperature of 70° C. for 120 minutes. Compressed by molding, the pressure is 150MPa. Vacuum sintering is used for sintering, and four-stage sintering process is used for heating. The temperature of the first stage is 150°C, the holding time is 30 minutes, the heating rate is controlled at 20°C / mi...

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PUM

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Abstract

The invention belongs to the field of high-entropy alloy materials, and discloses an AlCrFeNiSiTi high-entropy alloy porous material and a preparation method thereof. The AlCrFeNiSiTi high-entropy alloy porous material of the present invention comprises Al: 10%-20%, Cr: 10%-20%, Fe: 10%-20%, Ni: 10%-20%, Si: 10%-20% according to atomic percentage 20%, Ti: 10%-20%, using the reaction synthesis method of element powder to prepare AlCrFeNiSiTi high-entropy alloy porous material, using the element powder of each principal element as raw material, only a small amount of lubricant needs to be added during the preparation process, which can Low consumption and low cost; make full use of the Kirkendall effect caused by partial diffusion between elements to generate pores, the controllability of the pore structure is good, and there is no need to add pore-forming agents, and there is no problem of subsequent removal of pore-forming agents. It has the characteristics of short process and high performance.

Description

technical field [0001] The invention relates to the field of high-entropy alloy materials, in particular to an AlCrFeNiSiTi high-entropy alloy porous material and a preparation method thereof. Background technique [0002] Metal porous materials are currently widely used inorganic porous materials, mainly including FeNiCr stainless steel porous materials, FeCrAl alloy high temperature resistant porous materials, Ni-based alloy porous materials and Ti-based alloy porous materials. These traditional metal porous materials adopt the material design method of single principal element + alloying components, such as FeNiCr stainless steel and FeCrAl alloy with Fe as the main element, and other elements as alloying components. [0003] Compared with traditional metal materials, High Entropy Alloy (HEA) has obvious material advantages. Different from the material design method of single principal element + alloying component of traditional metal materials, high-entropy alloy adopts...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/08B22F1/00B22F3/02B22F3/10B22F3/11
CPCC22C19/058C22C30/00C22C1/08B22F3/02B22F3/1017B22F3/11B22F2999/00B22F1/052B22F1/10B22F2201/20
Inventor 江垚贺跃辉高海燕王重贺沈波涛干庆展
Owner CENT SOUTH UNIV
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