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Method for preparing SiC3D/Al composite through vacuum pressure infiltration positive-pressure method

A vacuum pressure impregnation and composite material technology, which is applied in the field of composite material preparation, can solve the problems of difficult demoulding of molds and high manufacturing costs, reduce manufacturing costs, improve demoulding efficiency, and facilitate quality control and mechanical and physical properties Effect

Active Publication Date: 2019-04-30
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to prepare SiC for the existing vacuum pressure impregnation positive pressure method. 3D / Al composite materials are difficult to demould and the preparation cost is too high. To provide a convenient vacuum pressure impregnation and positive pressure method for preparing SiC 3D / Al Composite Method

Method used

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  • Method for preparing SiC3D/Al composite through vacuum pressure infiltration positive-pressure method
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  • Method for preparing SiC3D/Al composite through vacuum pressure infiltration positive-pressure method

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Experimental program
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Effect test

Embodiment 1

[0032] Such as figure 1 As shown, the vacuum pressure positive pressure impregnation method is used to prepare the composite material, specifically, the SiC is prepared according to the following steps 3D / Al composites.

[0033] S1. According to the prepared SiC 3D Design molds for the shape and size of / Al composite materials, and prepare soluble ceramic molds;

[0034] The raw materials and proportions of the soluble ceramic mold are: fused corundum powder, quartz powder, zircon sand, binder (anhydrous sodium phosphate), plasticizer (polyethylene glycol, molecular weight 600), mineralizer ( Calcium oxide) mass ratio is 85:5:3:10:12:3.

[0035] The soluble ceramic mold is prepared by pressing and sintering, the sintering pressure is 1.0MPa, the sintering temperature is 1673K, and the sintering time is 30min.

[0036] The surface of the prepared soluble ceramic mold is smooth, and its apparent bulk density is 3.0g / cm 3 , moderate shrinkage, small deformation, the three-p...

Embodiment 2

[0047] Follow the steps below to prepare SiC 3D / ZL202 composite material.

[0048] S1. According to the prepared SiC 3D / ZL202 composite material shape design mold, preparation of soluble ceramic mold;

[0049] Soluble ceramic mold raw materials and their proportions are: fused corundum powder, quartz powder, zircon sand, binder (anhydrous sodium phosphate), plasticizer (polyethylene glycol, molecular weight 600), mineralizer (oxidizer Calcium) mass ratio is 85:5:3:10:12:3.

[0050] The soluble ceramic mold is prepared by pressing sintering method, the sintering pressure is 1.0MPa, the sintering temperature is 1573K, and the sintering time is 30min.

[0051] The surface of the prepared soluble ceramic mold is smooth, and its apparent bulk density is 3.0g / cm 3 , moderate shrinkage, small deformation, the three-point bending strength of the tested soluble ceramic mold is 22MPa, which can meet the requirements of the vacuum pressure positive pressure infiltration method.

...

Embodiment 3

[0062] Follow the steps below to prepare SiC 3D / ZL101 composite material.

[0063] S1. Design a mold according to the external dimensions of the prepared composite material, and prepare a soluble ceramic mold.

[0064] Soluble ceramic mold raw materials and their proportions are: fused corundum powder, quartz powder, zircon sand, binder (anhydrous sodium phosphate), plasticizer (polyethylene glycol, molecular weight 600), mineralizer (oxidizer Calcium) mass ratio is 85:5:3:10:12:3.

[0065] The soluble ceramic mold is prepared by pressing and sintering, the sintering pressure is 3MPa, the sintering temperature is 1673K, and the sintering time is 40min.

[0066] The prepared soluble ceramic mold has a smooth surface, an apparent bulk density of 3.2g / cm3, moderate shrinkage, and small deformation. The tested three-point bending strength of the soluble ceramic mold is 31.5MPa, which can meet the requirements of vacuum pressure and positive pressure impregnation. legal needs. ...

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Abstract

The invention discloses a method for preparing a SiC3D / Al composite through a vacuum pressure infiltration positive-pressure method for the first time. The method comprises the steps that soluble ceramic is adopted as a mold material to prepare a soluble ceramic mold, then, a three-dimensional continuous porous SiC perform is placed in the soluble ceramic mold, the soluble ceramic mold, to-be-infiltrated Al or an to-be-infiltrated alloy are placed in a crucible to be heated, subjected to heat preservation and cooled, in the preparation process, molten liquid Al is infiltrated into pores of theSiC preform under the action of external gas pressure and then subjected to cooling solidification at certain pressure, and finally the corresponding SiC3D / Al composite is formed. According to the method, the problems of difficult stripping of an existing graphite or alloy steel mold and excessively-high machining cost after the SiC3D / Al composite is prepared are solved, and thus the production cost of the SiC3D / Al composite is greatly lowered.

Description

technical field [0001] The invention relates to the technical field of preparation of composite materials, more specifically, to a vacuum pressure impregnation positive pressure method to prepare SiC 3D / Al composite method. Background technique [0002] Three-dimensional continuous network structure SiC / Al composite material (referred to as SiC 3D / Al composite material) has good application prospects in important fields such as the automobile industry, electronic packaging, and military industry due to its light weight, good wear resistance, and low thermal expansion coefficient. [0003] Current SiC 3D The preparation of / Al composite materials mainly adopts the melt infiltration method, and the vacuum pressure infiltration method is usually used. Preparation of SiC by Vacuum Pressure Impregnation 3D Al alloy steel or graphite is usually used as the mold material for Al composite materials. For alloy steel moulds, due to the long contact time between molten liquid Al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D23/04C04B35/10C04B35/622C04B35/63C04B35/634
CPCB22D23/04C04B35/10C04B35/622C04B35/6303C04B35/6313C04B35/63404C04B2235/3248C04B2235/3418
Inventor 朱静波王扬卫陈盛贵孙振忠卢秉恒
Owner DONGGUAN UNIV OF TECH
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