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Preparation method for metal-matrix composite enhanced by porous Si3N4/SiC multiphase ceramic

A technology of composite ceramics and composite materials, applied in ceramic products, applications, household appliances, etc., can solve the problems affecting the uniformity of composite materials, easy to agglomerate, etc., achieve the effect of low thermal expansion coefficient and improve mechanical properties

Active Publication Date: 2017-02-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, nanoparticle and nanowire reinforced metal matrix composites have received extensive attention. Due to the extremely high mechanical properties of nanoscale reinforcements, only a small amount (<10vol.%) can be added to greatly improve the comprehensive mechanical properties of the material, but nano Particles and nanowires are prone to agglomeration during the mixing process of raw materials, which affects the uniformity of the composite material

Method used

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  • Preparation method for metal-matrix composite enhanced by porous Si3N4/SiC multiphase ceramic
  • Preparation method for metal-matrix composite enhanced by porous Si3N4/SiC multiphase ceramic
  • Preparation method for metal-matrix composite enhanced by porous Si3N4/SiC multiphase ceramic

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specific Embodiment approach 1

[0035] Specific embodiment one: this embodiment is a kind of porous Si 3 N 4 The preparation method of SiC multiphase ceramic reinforced metal matrix composite material is specifically carried out according to the following steps:

[0036] 1. Preparation of slurry: Mix organic solvent and water evenly to obtain a mixed solution, add ceramic powder, sintering aid, dispersant, monomer and crosslinking agent, and use Al 2 o 3 Ball milling and mixing for 11h-13h to obtain a slurry; the volume ratio of the water and the organic solution is 1:(3-5); the ceramic powder is Si 3 N 4 Mixed powder with SiC, Si 3 N 4 The mass ratio to SiC is 1:(4~6); the volume ratio of the ceramic powder to the mixed solution is 1:(1.67~10); the mass ratio of the sintering aid to the ceramic powder is 1: (23~25); The mass ratio of described dispersant and ceramic powder is 1:(200~400); The mass ratio of described monomer and ceramic powder is 1:(5~7); The mass ratio of joint agent to ceramic powde...

specific Embodiment approach 2

[0040] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the organic solvent in step 1 is isopropanol. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0041] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the sintering aid described in step one is Y 2 o 3 and Al 2 o 3 mixed powder, Y 2 o 3 and Al 2 o 3 The mass ratio is 3:2. Others are the same as in the first embodiment.

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Abstract

The invention provides a preparation method for a metal-matrix composite enhanced by porous Si3N4 / SiC multiphase ceramic, and relates to a preparation method for a ceramic-enhanced metal-matrix composite. By adoption of the preparation method for the metal-matrix composite enhanced by the porous Si3N4 / SiC multiphase ceramic, the technical problems that an existing ceramic-enhanced metal-matrix composite is high in thermal expansion coefficient, and reinforcement bodies are prone to agglomeration and cannot be dispersed evenly are solved. The preparation method for the metal-matrix composite enhanced by the porous Si3N4 / SiC multiphase ceramic comprises the steps that firstly, slurry is prepared; secondly, the porous Si3N4 / SiC multiphase ceramic is prepared; thirdly, surface modification of the porous multiphase ceramic is conducted; and fourthly, the composite is prepared. According to the preparation method for the metal-matrix composite enhanced by the porous Si3N4 / SiC multiphase ceramic, the pore diameter of the porous multiphase ceramic is small, growth of metal grains in the composite is restrained, and the comprehensive mechanical property of the composite is effectively improved through fine crystal enhancement; Si3N4 / SiC nanowires in the porous multiphase ceramic are evenly distributed; ceramic enhancement bodies in the metal-matrix composite are distributed continuously, so that the metal-matrix composite has a low thermal expansion coefficient; and the metal content is high, so that the composite has high thermal conductivity.

Description

technical field [0001] The invention relates to a preparation method of a ceramic reinforced metal matrix composite material. Background technique [0002] Ceramic reinforced metal matrix composites have low density, high strength, high elastic modulus, high thermal conductivity, low thermal expansion coefficient and good wear resistance, and have a wide range of applications in aerospace, electronic packaging, machinery manufacturing, wear resistance and other fields. Application prospects. [0003] The morphology of reinforcements in ceramic reinforced metal matrix composites mainly includes the following categories: particles, sheets, fibers, whiskers and continuous phases. Among them, ceramic particle-reinforced metal matrix composites are the most studied type. Due to their low cost of raw materials and simple process, they have been widely used in industrial production, but their strength is lower than that of fiber and whisker reinforced composites. Ceramic particle...

Claims

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Application Information

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IPC IPC(8): C22C1/08C04B35/565C04B38/00C04B41/00C04B41/50C04B41/85
CPCB22F3/11C04B35/565C04B38/00C04B41/009C04B41/5031C04B41/85C04B2235/3873C04B2235/658C22C1/08C04B38/0074C04B38/007C04B41/4537C04B41/0072
Inventor 叶枫金义程丁俊杰马杰杨春萍高晔刘强张标
Owner HARBIN INST OF TECH
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