Method for improving mechanical property of aluminum borate whisker enhanced aluminum matrix composite materials

A technology of aluminum borate whiskers and composite materials, which is applied in the field of improving the mechanical properties of aluminum-based composite materials, can solve problems such as poor mechanical properties, and achieve the effects of improving mechanical properties, improving interface bonding, and improving interface wettability

Active Publication Date: 2016-02-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem of poor mechanical properties of existing aluminum borate whiskers reinforced

Method used

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Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0016] Specific implementation mode 1: This implementation mode is a method for improving the mechanical properties of aluminum borate whisker-reinforced aluminum-based composite materials, specifically according to the following steps:

[0017] 1. Addition of matrix alloy elements: heat and melt pure aluminum at a temperature of 700°C to 800°C to obtain molten pure aluminum, and add pure aluminum to the molten pure aluminum at a temperature of 700°C to 800°C Magnesium block to obtain a binary alloy melt; the mass fraction of the pure magnesium block in the binary alloy melt is 2.5% to 10%;

[0018] 2. Preparation of aluminum-magnesium alloy ingots: add a degasser to the binary alloy melt at a temperature of 700°C to 800°C, refine at a temperature of 750°C until no bubbles are generated, and stir for 10s to 20s to obtain a degassed binary alloy melt, and then add an aluminum-magnesium alloy covering agent at a temperature of 700°C to 800°C until the surface of the degassed bin...

specific Embodiment approach 2

[0021] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mass fraction of the pure magnesium block in the binary alloy solution in Step 1 is 6%. Others are the same as the first embodiment.

specific Embodiment approach 3

[0022] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the degassing agent described in step 2 is hexachloroethane. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a method for improving the mechanical property of aluminum matrix composite materials, in particular to a method for improving the mechanical property of aluminum borate whisker enhanced aluminum matrix composite materials. The technical problem that the mechanical property of existing aluminum borate whisker enhanced aluminum matrix composite materials is poor is solved. The method comprises the first step of adding of matrix alloy elements, the second step of preparing of aluminum magnesium alloy cast ingots, the third step of preparing of aluminum borate whisker prefabricated members and the fourth step of squeeze casting. Alloying element zinc or magnesium is added into pure aluminum, and a formed binary alloy is adopted as a matrix of the composite materials. In the preparing process of the composite materials, by means of the change and the content change of the matrix alloy elements, the interface structure and state of the composite materials are changed, and interfacial wettability is improved; and interface bonding of whiskers and the matrix is improved, and the mechanical property of the composite materials is remarkably improved. The method is applied to preparing of the aluminum matrix composite materials.

Description

Technical field: [0001] The invention relates to a method for improving the mechanical properties of aluminum-based composite materials. Background technique: [0002] Metal matrix composites have many excellent properties. In the past few decades, they have developed into an important class of structural materials, especially the high degree of designability of their properties. Composite materials are widely used in the fields of aerospace, automobile industry and sports equipment. [0003] The low price of aluminum borate whiskers solves the major problem that restricts the application of whiskers / aluminum matrix composites due to the high cost of whiskers, and lays a solid foundation for the large-area application of aluminum borate whiskers reinforced aluminum matrix composites. However, the poor wettability and severe interfacial reaction between aluminum borate whiskers and aluminum alloy seriously affect its mechanical properties, which become the biggest obstacle t...

Claims

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Application Information

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IPC IPC(8): C22C47/12C22C49/06C22C49/14C22C101/08
CPCC22C47/12C22C49/06C22C49/14
Inventor 胡津于玉城唐莎巍
Owner HARBIN INST OF TECH
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