Preparation method for aluminum base composite materials
A sintering method and technology of aluminum powder, which is applied in the field of aluminum-based composite materials, can solve problems such as the difficulty of realizing assembly line production, the inability to fuse aluminum powder, and harsh production conditions, and achieve the effects of fluffy particle size, increased conversion rate, and reduced roasting temperature
Inactive Publication Date: 2019-12-10
CENT SOUTH UNIV
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Problems solved by technology
At present, for aluminum powder sintering in the manufacturing industry, vacuum furnace sintering is generally used, which has the following disadvantages: harsh production conditions, difficult to achieve assembly line production, low production efficiency and high energy consumption; aluminum powder is easy to oxidize during production, and the surface is covered with a very The dense and stable oxide film makes sintering difficult, and the aluminum powder cannot be fused into the desired structure in the end
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0022] Select borax with a particle size of 500-700nm, graphite with a particle size of 300-500nm, molybdenum dioxide powder with a particle size of 500-600nm and aluminum powder with a particle size of 1μm, and mix them at a weight ratio of 100:10:10:5 And use a universal testing machine to press into a green body under 50Mpa. The particle diameter of described borax is 700nm. The particle size of the graphite is 500nm. The particle size of the molybdenum dioxide powder is 600nm.
[0023] Put the green body into a microwave sintering furnace filled with a hydrogen-nitrogen protective atmosphere, set the temperature of the fourth zone of the sintering furnace at 600°C, and sinter at normal pressure for about 1 hour.
[0024] The finished aluminum matrix composite material obtained by sintering according to the above steps has a thickness of 0.8mm and a porosity of 60-65%.
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Abstract
The invention provides an aluminum powder sintering method. The aluminum powder sintering method comprises the following steps: (1) aluminum powder, borax, graphite and molybdenum dioxide powder are mixed and pressed as blanks; and (2) the blanks prepared in the step (1) are sintered by microwaves under a protective atmosphere to obtain finished products.
Description
technical field [0001] The invention belongs to the technical field of aluminum-based composite materials, and in particular relates to a preparation method of aluminum-based composite materials. Background technique [0002] Because aluminum powder sintered materials have good mechanical properties and thermal conductivity, they are gradually and widely used in capacitors. At present, the manufacturing industry generally adopts vacuum furnace sintering for aluminum powder sintering, which has the following disadvantages: harsh production conditions, difficult to achieve assembly line production, low production efficiency and high energy consumption; aluminum powder is easy to oxidize during production, and the surface is covered with a very The dense and stable oxide film makes sintering difficult, and the aluminum powder cannot be fused into the required structure in the end. Contents of the invention [0003] The purpose of the present invention is to provide a method ...
Claims
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IPC IPC(8): C22C21/00C22C1/08C22C32/00
CPCB22F3/11C22C21/00C22C32/0084C22C32/0089
Inventor 刘芳洋艾亮贾明蒋良兴
Owner CENT SOUTH UNIV