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A preparation method of aluminum oxide/aluminum composite powder with flake crosslinked structure

A cross-linked structure, alumina technology, used in metal processing equipment, transportation and packaging, etc., can solve the problems of poor wettability, complex process, not widely popularized and applied, and achieve improved wettability, good wettability, Simple and environmentally friendly preparation method

Active Publication Date: 2018-05-25
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The wettability of alumina and aluminum matrix is ​​also an important factor affecting the performance of composite materials. Poor wettability makes it difficult for alumina / aluminum composites to reach theoretical targets.
Researchers in Iran used high-energy ball milling technology to modify the surface of alumina particles to obtain inclusions of alumina and aluminum, and added the inclusions as the second phase to the aluminum liquid matrix to prepare aluminum-based composite materials, thereby improving the composite material. The wettability between medium alumina and aluminum matrix, this method is complex and has not been widely applied

Method used

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  • A preparation method of aluminum oxide/aluminum composite powder with flake crosslinked structure
  • A preparation method of aluminum oxide/aluminum composite powder with flake crosslinked structure
  • A preparation method of aluminum oxide/aluminum composite powder with flake crosslinked structure

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Embodiment 1

[0021] The preparation method of the aluminum oxide / aluminum composite powder with flake crosslinked structure in this embodiment, the specific steps are as follows:

[0022] (1) Alumina particles and aluminum powder are mixed uniformly according to the mass ratio of 5:2, and used as raw materials;

[0023] (2) Put the raw material of step (1) in the high-purity alumina crucible 5, place the high-purity alumina crucible 5 in the working area of ​​the vacuum reaction furnace, and place a high-purity alumina condensation plate on the high-purity alumina crucible 5 6. When the pressure in the furnace is lower than 1Pa, the air is pumped from the vacuum exhaust port 7, and the current is passed through the water-cooled electrode 1 to the graphite electrode base 2, so that the graphite electrode heating element 3 connected to the heating element base 2 generates heat and heats the working area. The high-purity alumina crucible 5, the heat insulation layer 4 reduces the loss of heat...

Embodiment 2

[0028] The preparation method of the aluminum oxide / aluminum composite powder with flake crosslinked structure in this embodiment, the specific steps are as follows:

[0029] (1) Alumina particles and aluminum powder are mixed uniformly according to the mass ratio of 5:1.5 as raw materials;

[0030] (2) Put the raw material of step (1) in the high-purity alumina crucible 5, place the high-purity alumina crucible 5 in the working area of ​​the vacuum reaction furnace, and place a high-purity alumina condensation plate on the high-purity alumina crucible 5 6. When the pressure in the furnace is lower than 1Pa, the air is pumped from the vacuum exhaust port 7, and the current is passed through the water-cooled electrode 1 to the graphite electrode base 2, so that the graphite electrode heating element 3 connected to the heating element base 2 generates heat and heats the working area. The high-purity alumina crucible 5, the heat insulation layer 4 reduces the loss of heat, and th...

Embodiment 3

[0038] The preparation method of the aluminum oxide / aluminum composite powder with flake crosslinked structure in this embodiment, the specific steps are as follows:

[0039] (1) Alumina particles and aluminum powder are mixed uniformly according to the mass ratio of 5:1, and used as raw materials;

[0040] (2) Put the raw material of step (1) in the high-purity alumina crucible 5, place the high-purity alumina crucible 5 in the working area of ​​the vacuum reaction furnace, and place a high-purity alumina condensation plate on the high-purity alumina crucible 5 6. When the pressure in the furnace is lower than 1Pa, the air is pumped from the vacuum exhaust port 7, and the current is passed through the water-cooled electrode 1 to the graphite electrode base 2, so that the graphite electrode heating element 3 connected to the heating element base 2 generates heat and heats the working area. The high-purity alumina crucible 5, the heat insulation layer 4 reduces the loss of heat...

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Abstract

The invention discloses a method for preparing alumina / aluminum composite powder with a sheet-shaped crosslinked structure, which uses high-purity alumina particles and aluminum powder as raw materials to generate sub-oxide under the conditions of 1300°C-1500°C in a vacuum. Aluminum gas, as the reaction progresses, the alumina particles in the reaction vessel are etched into a sheet-like cross-linked structure, and metallic aluminum is wrapped on the surface of the alumina particles to form a sheet-like cross-linked aluminum oxide / aluminum composite powder; The alumina / aluminum composite powder with flake crosslinked structure prepared by the invention has good wettability between aluminum and alumina, and the composite powder is added to the aluminum matrix as the second phase to prepare alumina / aluminum composite material , can improve the wettability between the reinforcing body and the matrix; the process of the invention is simple, environmentally friendly, no waste gas and waste liquid are generated, and the alumina / aluminum composite powder obtained on the condensation device can be recycled as a by-product.

Description

technical field [0001] The invention relates to a method for preparing a flaky crosslinked aluminum oxide / aluminum composite powder, which belongs to the field of composite materials. Background technique [0002] Alumina / aluminum composite materials have a series of excellent properties such as high specific strength, high specific stiffness, high wear resistance and low thermal expansion coefficient. The morphology of alumina reinforcement has an important influence on the performance of composite materials. As the reinforcement phase of metal matrix composites, flake alumina can improve the toughness and strength of composite materials. [0003] The wettability of alumina and aluminum matrix is ​​also an important factor affecting the performance of composite materials. Poor wettability makes it difficult for alumina / aluminum composites to reach theoretical targets. Researchers in Iran used high-energy ball milling technology to modify the surface of alumina particles to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/16B22F1/00
CPCB22F9/16B22F1/068
Inventor 冯月斌张笑杨保民陈阵
Owner KUNMING UNIV OF SCI & TECH