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Method for preparing coated Al2O3/Al composite powder through hydrothermal method

A composite powder and packaged technology, which is applied in transportation and packaging, metal processing equipment, etc., can solve the problems of uneven distribution of reinforcement phase and performance degradation, and achieve the effects of easy control, low energy consumption and simple operation

Inactive Publication Date: 2016-07-20
JIUJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of performance degradation of aluminum matrix composites due to uneven distribution of reinforcement phases, surface-treat Al powder raw materials, introduce one-phase or multi-phase reinforcement phases with excellent performance, and prepare wrapped Al 2 o 3 / Al composite powder

Method used

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  • Method for preparing coated Al2O3/Al composite powder through hydrothermal method
  • Method for preparing coated Al2O3/Al composite powder through hydrothermal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] First add 10 grams of aluminum powder into the beaker, add 10 ml of distilled water, stir to form a slurry, drop 0.01mol / L aluminum nitrate solution and ammonia solution into the aluminum powder slurry at the same time, let the pH of the slurry Keep the value at 7, continue to stir for 0.5 hours, pour the slurry in the beaker into the reactor, put the reactor into the oven, raise the temperature of the oven to 100°C and keep it warm for 1 hour, and wash the slurry 3 times with distilled water , then washed once with absolute ethanol, and dried to obtain the wrapped Al 2 o 3 / Al composite powder.

Embodiment 2

[0016] First add 10 grams of aluminum powder into the beaker, add 50 ml of distilled water, stir to form a slurry, drop 1mol / L aluminum nitrate solution and ammonia solution into the aluminum powder slurry at the same time, let the pH of the slurry Keep at 11, continue to stir for 3 hours, pour the slurry in the beaker into the reactor, put the reactor into the oven, raise the temperature of the oven to 300°C and keep it warm for 200 hours, wash the slurry 3 times with distilled water, Then wash with absolute ethanol once, and then dry to obtain the wrapped Al 2 o 3 / Al composite powder.

Embodiment 3

[0018] First add 10 grams of aluminum powder into the beaker, add 30 ml of distilled water, stir to form a slurry, drop 0.5 mol / L aluminum nitrate solution and ammonia solution into the aluminum powder slurry at the same time, let the pH of the slurry Keep the value at 9, continue to stir for 1 hour, pour the slurry in the beaker into the reaction kettle, put the reaction kettle into the oven, raise the temperature of the oven to 200°C and keep it warm for 100 hours, and wash the slurry with distilled water for 3 times , then washed once with absolute ethanol, and dried to obtain the wrapped Al 2 o 3 / Al composite powder, such as figure 2 shown. In the figure (a) is aluminum powder (b) is wrapped Al 2 o 3 / Al composite powder.

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Abstract

The invention discloses a method for preparing coated Al2O3 / Al composite powder through a hydrothermal method. The method specifically includes the steps that aluminum powder is added into a beaker firstly, distilled water is added into the beaker, and the mass ratio of the aluminum powder to the distilled water is 1:1-1:5; stirring is conducted, and slurry is formed; an aluminum nitrate solution with the concentration being0.01 mol / L to 1 mol / L and an ammonia water solution are dripped into the aluminum powder slurry at the same time, the pH of the slurry is kept between 7 to 11, stirring is conducted for 0.5 h to 3 h continuously, the slurry in the beaker is poured into a reaction kettle, the reaction kettle is put into an oven, the temperature of the oven is increased to 100 DEG C to 300 DEG C, and heat insulation is conducted for 1-200 hours; the obtained slurry is cleaned three times with distilled water and then cleaned one time with absolute ethyl alcohol; and the coated Al2O3 / Al composite powder can be prepared after drying. The method has the beneficial effects of being easy and convenient to operate, easy to control, low in energy consumption and the like.

Description

technical field [0001] The invention belongs to ultrafine materials and a preparation method thereof, and relates to an inorganic powder and a preparation method thereof, in particular to a method for preparing alumina-wrapped aluminum powder by a hydrothermal method. Background technique [0002] Cermet is a heterogeneous composite material composed of metal or alloy and one or more ceramic phases, of which the latter accounts for about 15% to 85% of the volume of the material. At the preparation temperature, the gap between the metal phase and the ceramic phase The dissolution is very weak. Cermet not only maintains the high hardness, wear resistance, corrosion resistance, high temperature resistance, oxidation resistance and chemical stability of ceramic materials, but also has the high strength, high toughness and high thermal conductivity and electrical conductivity of metal materials. The composition makes the ceramic-metal composite material have high hardness, therm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02
CPCB22F1/16
Inventor 宋杰光李世斌王秀琴王芳王瑞花杨超
Owner JIUJIANG UNIVERSITY
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