Reinforced intragranular aluminum matrix composites with nano ceramic particles added externally and preparation process thereof

A technology of nano-ceramic particles and aluminum-based composite materials, applied in the field of ceramic particle-reinforced aluminum-based composite materials and its preparation, which can solve the problems of difficult control of particle size, low strength, and low plasticity, and achieve increased strength, uniform distribution, and convenient operation Effect

Inactive Publication Date: 2012-10-24
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem that the particle size of the nanoparticle-reinforced aluminum-based composite material prepared by the existing in-situ method is difficult to control within the nanoscale range and that the nanoparticle-reinforced aluminum-based composite material pre

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  • Reinforced intragranular aluminum matrix composites with nano ceramic particles added externally and preparation process thereof
  • Reinforced intragranular aluminum matrix composites with nano ceramic particles added externally and preparation process thereof

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specific Embodiment approach 1

[0021] Specific embodiment 1: In this embodiment, an intracrystalline aluminum-based composite material reinforced with nano-ceramic particles is composed of 1-10 parts of nano-ceramic particles and 90-99 parts of alloy by volume; wherein, the alloy is aluminum powder or Aluminum alloy powder.

[0022] The method of this embodiment can overcome the limitation of the types of in-situ synthesized particles and the disadvantages that the corresponding size is difficult to control. The size range of the reinforcement can be strictly controlled by the addition of nano-ceramic particles, and the metal-based composite with the addition of nano-ceramic particles can be accurately prepared. material.

specific Embodiment approach 2

[0023] Specific embodiment two: this embodiment is different from specific embodiment one in that the ceramic particles are SiC ceramics, SiO 2 , MgO, TiB 2 , Al 2 O 3 , Si 3 N 4 Or TiC. Others are the same as the first embodiment.

specific Embodiment approach 3

[0024] Specific embodiment three: This embodiment is different from specific embodiment one or two in that the particle size of the ceramic particles is 20-100 nm. Others are the same as the first or second embodiment.

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Abstract

The invention relates to reinforced intragranular aluminum matrix composites with nano ceramic particles added externally and a preparation process thereof. According to composites and the preparation process, the problems that particle sizes of nano particle reinforced aluminum matrix composites prepared by an existing in-situ method is hard to be controlled within the nanoscale range and nano particle reinforced aluminum matrix composites prepared by an existing external addition method are grain-boundary type nano particle reinforced aluminum matrix composites and low in strength and plasticity are solved. The preparation process comprises 1, weighing out constituents, and adding stearic acid which accounts for 0.6-8% of the gross mass to conduct ball milling; 2, conducting vacuum hot pressed sintering to form blocks after ball milling; and 3, conducting hot extrusion deformation on blocks to obtain nano ceramic particle reinforced aluminum matrix composites. Composites prepared bythe process are high in strength and good in plasticity. Composites and the preparation process are applicable to the field of preparation of aluminum matrix composites.

Description

Technical field [0001] The invention relates to a ceramic particle reinforced aluminum-based composite material and a preparation method thereof. Background technique [0002] Nano ceramic particles (such as SiC, SiO 2 , MgO, TiB 2 , Al 2 O 3 , Si 3 N 4 And TiC) reinforced aluminum matrix composite materials are getting extensive attention and research due to their excellent mechanical properties. Generally, the preparation methods of nanoparticle-reinforced aluminum-based composites include in-situ methods and external addition methods. However, although the in-situ method can obtain intragranular reinforcing phases, due to the fast reaction speed and high temperature, it is difficult to control the particle size of the in-situ synthesized particles within the nanometer range, and the in-situ method can only synthesize a limited variety of ceramics. Particles. [0003] Generally speaking, nanoparticles can be distributed inside crystal grains or on grain boundaries. Due to their...

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Application Information

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IPC IPC(8): C22C21/00C22C32/00C22C1/05C22C1/10
Inventor 李爱滨曹国剑李斌玲施虹霞耿林谭振斌
Owner HARBIN INST OF TECH
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