A preparation method of in-situ dual-phase reinforced aluminum matrix composite material

A technology for strengthening aluminum matrix and composite materials, applied in the field of aluminum matrix composite materials and their preparation, can solve the problems of low density of AlC reinforced aluminum matrix composite materials, and achieve the promotion of Al liquid infiltration, high elastic modulus, and excellent elasticity. The effect of modulus

Active Publication Date: 2021-07-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the invention is to solve the problem of Ti produced by powder metallurgy 2 The problem of low density of AlC-reinforced aluminum-matrix composites, a method for preparing aluminum-matrix composites with in-situ dual-phase reinforcement

Method used

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  • A preparation method of in-situ dual-phase reinforced aluminum matrix composite material
  • A preparation method of in-situ dual-phase reinforced aluminum matrix composite material

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Experimental program
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specific Embodiment approach 1

[0022] Specific implementation mode 1: In this implementation mode, the preparation method of the in-situ dual-phase reinforced aluminum matrix composite material is carried out according to the following steps:

[0023] 1. Weighing: Weigh Ti 2 AlC powder and aluminum metal as raw materials, Ti in raw materials 2 The volume fraction of AlC powder is 5-45%, and the balance is aluminum metal;

[0024] 2. Prefabricated body molding: the Ti weighed in step 1 2 AlC powder is loaded into a mold for cold pressing to obtain Ti 2 AlC powder preform;

[0025] 3. Preheating: Ti obtained in step 2 2 Move the AlC powder preform with the mold to the heating furnace, raise the temperature of the heating furnace from room temperature to 500-660°C and keep it warm for 6-8 hours to obtain preheated Ti 2 AlC powder preform; under a protective atmosphere, heat the aluminum metal weighed in step 1 to 750-850°C to obtain molten aluminum metal;

[0026] 4. Liquid aluminum impregnation: the pre...

specific Embodiment approach 2

[0033] Specific embodiment two: the difference between this embodiment and specific embodiment one is: Ti described in step one 2 The purity of the AlC powder is greater than 90%, and the particle size is 8-10 μm. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0034] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the aluminum metal in step 1 is pure aluminum or aluminum alloy. Other steps and parameters are the same as those in the first embodiment.

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Abstract

A method for preparing an aluminum-based composite material with in-situ dual-phase reinforcement, relating to an aluminum-based composite material and a preparation method thereof. The purpose is to solve the Ti 2 The problem of low density of AlC reinforced aluminum matrix composites. Method: First weigh the material, then Ti 2 AlC powder was loaded into a mold for cold pressing to obtain Ti 2 AlC powder preform, Ti 2 The AlC powder preform is heated while the aluminum metal is melted, and finally infiltrated with liquid aluminum. The invention realizes the preparation of aluminum-based composite materials with high strength, high hardness and high modulus of elasticity. The invention is suitable for preparing aluminum-based composite materials.

Description

technical field [0001] The invention relates to an aluminum-based composite material and a preparation method thereof. Background technique [0002] Ti 2 AlC has become an ideal reinforcement for composite materials due to its various excellent comprehensive properties and the lowest density and simplest structure in the MAX phase. Currently using Ti 2 There are few literature reports on AlC reinforced aluminum matrix composites. In the literature so far reported, Ti 2 The preparation methods of AlC-Al system composite materials are to reduce the generation of brittle phase in the interface reaction by inhibiting the interface reaction, so as to improve the plasticity of the material. The main preparation method is powder metallurgy, which is low-temperature solid-phase sintering. The density of the material is low, and the density of the prepared composite material is only 96-98% of its theoretical density. Contents of the invention [0003] The purpose of the invent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C1/03C22C21/00C22C32/00
CPCC22C1/1036C22C21/00C22C32/0052C22C1/1073
Inventor 武高辉周畅孙月乔菁赵子民
Owner HARBIN INST OF TECH
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