ZnO coating aluminum boric acid crystal whisker reinforcing aluminum base composite material and method for producing the same

A technology for coating aluminum borate and aluminum borate whiskers, which is applied in metal material coating process, liquid chemical plating, coating, etc. Poor wetness and other problems, to achieve low deformation resistance, improve floating, and low processing temperature

Inactive Publication Date: 2008-06-11
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of poor wettability between aluminum borate whiskers and the matrix, interfacial reaction with elements in the matrix, complex process for preparing aluminum borate-reinforced aluminum matrix composite materials, high cost and uneven material structure in the existing composite materials , and provide a ZnO-coated aluminum borate whisker-reinforced aluminum-matrix composite material and a preparation method thereof

Method used

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  • ZnO coating aluminum boric acid crystal whisker reinforcing aluminum base composite material and method for producing the same

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specific Embodiment approach 1

[0008] Specific embodiment 1: In this embodiment, the ZnO-coated aluminum borate whisker-reinforced aluminum-based composite material is synthesized by processing ZnO-coated aluminum borate whiskers and an aluminum alloy matrix, wherein the ZnO-coated aluminum borate whiskers account for 1% of the total volume of the composite material. ~15%.

specific Embodiment approach 2

[0009] Embodiment 2: The difference between this embodiment and Embodiment 1 is that ZnO-coated aluminum borate whiskers account for 8% of the total volume of the composite material. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0010] Specific embodiment three: the method for preparing ZnO-coated aluminum borate whisker reinforced aluminum matrix composite material is realized by the following steps: one, the concentration is that the aluminum borate whisker of 100g / L and the concentration are the hydrofluoric acid of 70% by 1: Mix at a molar ratio of 480 to 520, let stand for 5 to 7 hours, wash the precipitate with distilled water to make the pH value 6 to 8, and then dry to obtain pure aluminum borate whiskers; 2. Mix 1 mole of pure aluminum borate Whiskers, 27,600-28,000 moles of distilled water and 45-55 moles of zinc chloride are mixed and stirred, ultrasonically dispersed for 30-60 minutes, filtered and dried, then put into a heating furnace, and heated to 480-520°C at a rate of 20°C / min and calcined for 1-3 hours, and then taken out with furnace cooling; 3. Add distilled water to the calcined product, stir and ultrasonically disperse for 25-35 minutes, then dry, grind and disperse to obtain ZnO...

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Abstract

The invention discloses ZnO coating aluminum borate whisker reinforced aluminum matrix composite material and the preparation method thereof, which relates to composite material and the preparation method thereof. The invention solves the problems that the wettability of the aluminum borate whisker and the matrix in the composite material is poor, the interface reaction is generated between the aluminum borate whisker and elements of the matrix, the process of preparing aluminum borate reinforced aluminum matrix composite material is complex, the cost is high, and the material tissues are not uniform. In the method of the invention, ZnO coating aluminum borate whisker is prepared, then alloy is smelted, the preheating ZnO coating aluminum borate whisker is added into the alloy in the semi-solid state, semi-solid state mechanical stirring is performed to obtain semi-solid state pulp material, and the ZnO coating aluminum borate whisker reinforced aluminum matrix composite material is obtained through semi-solid state extrusion forming. In the invention, the wettability of the aluminum borate whisker and the matrix in the composite material is enhanced, the interface reaction in the elements of the matrix is prevented, the process of preparing aluminum borate reinforced aluminum matrix composite material is simple, the cost is low, and the material tissues are uniform.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof. Background technique [0002] At present, the main preparation processes of aluminum borate reinforced aluminum matrix composites are powder metallurgy and extrusion casting. In the powder metallurgy process, some long whiskers are not easy to homogenize when mixed with metal powder. At the same time, in order not to damage the whiskers, they cannot be fully ball-milled. In fact, the microscopic segregation of whiskers in the matrix is ​​relatively serious. It must be perfected through the subsequent extrusion process. In addition, due to the complexity of the equipment and process, and the hot and cold pressing must be carried out under vacuum or protective atmosphere, the high cost of the powder metallurgy method limits its application. The reaction temperature of the squeeze casting process is high, the reaction intensity is violent, and the preparation of the preform i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/02B22D21/04B22D18/02C23C18/16
Inventor 关丽娜耿林郑镇洙吕奎明李爱滨
Owner HARBIN INST OF TECH
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