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Magnetic particle reinforced Al matrix composite and preparation method thereof

A composite material, enhanced aluminum-based technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., to achieve the effect of increasing tensile strength, improving strength, and high plastic toughness

Active Publication Date: 2019-03-01
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The main types of existing reinforcement phases are as follows, including (1) oxides, such as alumina; (2) borides, such as TiB 2 and ZrB 2 ; (3) intermetallic compound, such as Al 3 Zr、Al 3 Ti and its mixture Al 3 (Ti 1-x Zr x )(x=0~1), the particle size ranges from a few microns to nanometers, and it still needs to be expanded and deepened

Method used

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  • Magnetic particle reinforced Al matrix composite and preparation method thereof
  • Magnetic particle reinforced Al matrix composite and preparation method thereof
  • Magnetic particle reinforced Al matrix composite and preparation method thereof

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preparation example Construction

[0023] A magnetic particle-reinforced aluminum-based composite material of the present invention and its preparation method are characterized in that the preparation process includes the following steps:

[0024] (a)Nd 2 Fe 14 Treatment of B powder: Nd 2 Fe 14 B powder is heated in a vacuum heating furnace at 640-660°C for 1-3 hours, and then Nd is added 2 Fe 14 B powder mass fraction 4-6% alcohol in a ball mill for 10-12 hours, then dry the ball-milled powder in a vacuum furnace for 1-2 hours at a drying temperature of 100-110°C to fully remove the attached water, and after cooling, use aluminum foil pack ready for use;

[0025] (b) Metal melt preparation: melting aluminum or aluminum alloy in a crucible furnace, refining and degassing when the temperature is raised to 730°C-750°C, and preparing for synthesis when the temperature is lowered to 610-620°C;

[0026] (c) Composite synthesis: Nd wrapped with aluminum foil 2 Fe 14 Add B powder into the molten aluminum, stir...

Embodiment 1

[0027] Example 1 1vol.% Nd 2 Fe 14 Preparation of B Particle Reinforced 2024 Aluminum Matrix Composites

[0028] The main components of 2024 are shown in Table 2. Target Nd 2 Fe 14 B particle volume fraction 1vol.% (mass fraction is 2.8%), initial aluminum amount is 1kg, Nd 2 Fe 14 B 28g.

[0029] Table 2 Chemical composition of 2024 aluminum alloy (wt%)

[0030]

[0031] The preparation process is: according to the amount of aluminum and the principle of ingredients, determine the Nd 2 Fe 14 After mass B, first heat the powder at 650°C under vacuum for 2 hours, then add Nd 2 Fe 14 B The powder mass fraction is 5% alcohol in a ball mill for 10 hours, and then the ball-milled powder is dried in a vacuum furnace for 2 hours at a drying temperature of 110°C to fully remove the attached water, and after cooling, wrap it with aluminum foil for use; Melting 2024 aluminum alloy in medium, refining and degassing when the temperature rises to 750°C, and when the temperatu...

Embodiment 2

[0032] Example 2 1vol.% Nd 2 Fe 14 Preparation of ZL101A Al-Matrix Composite Magnetic Material Reinforced by B Particles

[0033]The main components of ZL101A are listed in Table 1. Target Nd 2 Fe 14 B particle volume fraction 1vol.% (mass fraction 2.8%), initial aluminum amount is 1kg, Nd 2 Fe 14 B 28g.

[0034] Table 1 Chemical composition of ZL101A aluminum alloy (wt%)

[0035]

[0036] The preparation process is: according to the amount of aluminum and the principle of ingredients, determine the Nd 2 Fe 14 After B quality, first put Nd 2 Fe 14 B powder was heated under vacuum at 650°C for 3 hours, then Nd was added 2 Fe 14 The alcohol of B powder mass fraction 5% was ball-milled in ball mill for 10 hours, and the Nd that ball milled was good after that 2 Fe 14 Dry B powder in a vacuum oven for 1 hour at a temperature of 100°C to fully remove the attached water and alcohol. After cooling, wrap the powder with aluminum foil according to the amount of 20-30g ...

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Abstract

The invention provides a magnetic particle reinforced Al matrix composite and a preparation method thereof. The composite is prepared from submicron sized Nd2Fe14B particles as a reinforcing phase with a melt direct synthesis method, that is, submicron Nd-Fe-B powder is added to pure Al or Al alloy melt. The magnetic particle reinforced Al matrix composite has the characteristics of high magnetism, low cost, high strength, high wear resistance, low thermal expansion and low residual stress, and is a novel magnetic function and structure reinforced material. The preparation method is simple andefficient, and is worthy of development and popularization.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a particle-reinforced aluminum-based composite material and a preparation method thereof, belonging to the field of new material preparation. Background technique [0002] Aluminum matrix composites combine the advantages of aluminum matrix and composite phase, and have comprehensive excellent performance such as high strength, high modulus, high wear resistance, and low expansion. They have attracted much attention in the research of new materials. When particles are used as reinforcing phase It has the characteristics of good anisotropy, good particle rounding, uniform dispersion, and uniform stress dispersion when external force is applied. Therefore, research on new particle-reinforced aluminum matrix composites has attracted much attention in the industry. [0003] The main types of existing reinforcement phases are as follows, including (1) oxides, such as alumina; (2) bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03H01F1/057
CPCH01F1/057C22C1/026C22C1/03C22C21/00C22C1/12
Inventor 李桂荣许拓封伟航王宏明解萌蕾
Owner JIANGSU UNIV
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