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Method for preparing SiC3D/Al composite material through squeezing impregnation method

A technology of composite material and impregnation method, which is applied in the field of composite material preparation, can solve the problems of low-carbon steel auxiliary mold demoulding difficulties, large machining volume, etc., and achieve low price, improved demoulding efficiency, and mature and stable preparation process Effect

Active Publication Date: 2019-05-31
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved in the present invention is to prepare SiC 3D / Al composite materials, the low-carbon steel auxiliary mold used is difficult to demould, and the follow-up machining volume is insufficient. The soluble ceramic mold is used to replace the existing low-carbon steel auxiliary mold to provide a convenient demoulding and relatively simple process. extrusion infiltration

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  • Method for preparing SiC3D/Al composite material through squeezing impregnation method
  • Method for preparing SiC3D/Al composite material through squeezing impregnation method
  • Method for preparing SiC3D/Al composite material through squeezing impregnation method

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Embodiment 1

[0041] Preparation of SiC 3D / Al composite material (in this embodiment, Al is ZL102, i.e. SiC 3D / Al composite material is SiC 3D / ZL102).

[0042] SiC 3D / Al composites were prepared according to the following steps:

[0043] S1. According to the required SiC 3D / Al composite workpiece structure and dimensions, respectively design the structure and size of soluble ceramic auxiliary mold and steel mold, process and prepare soluble ceramic auxiliary mold and steel mold.

[0044] In order to ensure that the porous SiC preform can be placed smoothly, a gap of 0.5-1.0mm is left between the inner wall of the soluble ceramic auxiliary mold and the porous SiC preform; Drainage holes are designed in the seepage direction, and the drainage holes occupy 20% to 30% of the area of ​​the panel. A gap of 0.5-1.0 mm is reserved between the cavity of the steel mold and the auxiliary mold.

[0045] S2. After the porous SiC prefabricated body is placed in the soluble ceramic auxiliary m...

Embodiment 2

[0057] Preparation of SiC 3D / Al composite material (in this embodiment, Al is ZL201, i.e. SiC 3D / Al composite material is SiC 3D / ZL201).

[0058] SiC 3D / Al composites were prepared according to the following steps:

[0059] S1. According to the required SiC 3D / Al composite workpiece structure and dimensions, respectively design the structure and size of soluble ceramic auxiliary mold and steel mold, process and prepare soluble ceramic auxiliary mold and steel mold.

[0060] In order to ensure that the porous SiC preform can be placed smoothly, a gap of 0.5-1.0mm is left between the inner wall of the soluble ceramic auxiliary mold and the porous SiC preform; Drainage holes are designed in the seepage direction, and the drainage holes occupy 20% to 30% of the area of ​​the panel. A gap of 0.5-1.0 mm is reserved between the cavity of the steel mold and the auxiliary mold.

[0061] S2. After the porous SiC prefabricated body is placed in the soluble ceramic auxiliary m...

Embodiment 3

[0073] Preparation of SiC 3D / Al composite material (in this embodiment, Al is ZL101, that is, SiC 3D / Al composite material is SiC 3D / ZL101).

[0074] SiC 3D / Al composites were prepared according to the following steps:

[0075] S1. According to the required SiC 3D / Al composite workpiece structure and dimensions, respectively design the structure and size of soluble ceramic auxiliary mold and steel mold, process and prepare soluble ceramic auxiliary mold and steel mold.

[0076] In order to ensure that the porous SiC preform can be placed smoothly, a gap of 0.5-1.0mm is left between the inner wall of the soluble ceramic auxiliary mold and the porous SiC preform; Drainage holes are designed in the seepage direction, and the drainage holes occupy 20% to 30% of the area of ​​the panel. A gap of 0.5-1.0 mm is reserved between the cavity of the steel mold and the auxiliary mold.

[0077] S2. After the porous SiC prefabricated body is placed in the soluble ceramic auxilia...

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Abstract

The invention provides a method for preparing a SiC3D / Al composite material through a squeezing impregnation method. The method comprises the steps that soluble ceramic is taken as an auxiliary mold for preparing the composite material, a squeezing impregnation technology is utilized to rapidly fill pores of a porous SiC preform with molten Al, higher mechanical pressure is exerted, the liquid Alis condensed and cooled to the room temperature before being put into sufficient hot water to be mechanically vibrated, demolding is completed by using the characteristic that the soluble ceramic auxiliary mold easily diffuse in water, and finally an excessive Al material is removed to obtain the SiC3D / Al composite material. The method has the advantages that the production efficiency of the SiC3D / Al composite material can be improved, the problems of difficult auxiliary mold demolding, higher cost and the need of a large amount of machine processing in the composite material taking process are solved by the application of the soluble ceramic auxiliary mold. The invention provides an efficient method for SiC3D / Al composite material industrial production.

Description

technical field [0001] The invention relates to the technical field of preparation of composite materials, more specifically, to a method of extrusion and infiltration 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] Currently, SiC 3D The preparation of Al / Al composite materials mainly adopts the melt infiltration method. According to the presence or absence of pressure and the length of infiltration time in the melt SiC infiltration process, this preparation method can be divided into three categories, namely, pressureless infiltration method, Vacuum pressure infiltration method and squeeze infiltration method, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D23/04B22D18/02B22C1/00B22D29/04
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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