Ceramic particle coating method and composite material preparation method

A technology of ceramic particles and composite materials, which is applied in metal material coating process, transportation and packaging, liquid chemical plating, etc. It can solve the problems of rapid volatilization and shedding of adhesives, affecting the integrity and uniformity of coating layers, etc. , to achieve good bonding performance and improve bonding strength

Pending Publication Date: 2022-08-05
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can obtain such core-shell materials in large quantities, but during the preparation of ceramic / metal matrix composites, the coating powders that are simply mechanically combined are in direct contact with the flowing high-temperature metal, resulting in the coating powders on the surface being washed away; In addition, due to the long-term high-temperature conditions, the binder in the inner layer will quickly volatilize, and even fall off from the surface of the ceramic particles into the molten metal, which will affect the integrity and uniformity of the coating layer formed by the coating powder to varying degrees. sex

Method used

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  • Ceramic particle coating method and composite material preparation method
  • Ceramic particle coating method and composite material preparation method
  • Ceramic particle coating method and composite material preparation method

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preparation example Construction

[0031] Another aspect of the present invention provides a method for preparing a composite material. In an exemplary embodiment of the composite material preparation method of the present invention, the following steps may be included:

[0032] S100, the ceramic particles are mixed with the binder, the coating powder is added, and after stirring, the ceramic particles coated by the coating powder are obtained.

[0033] S101, the ceramic particles coated with the coating powder are mixed with polyvinyl alcohol, and after drying, the ceramic particles coated with the coating powder and the polyvinyl alcohol are obtained.

[0034] S102 , activating the ceramic particles coated with the coating powder and polyvinyl alcohol, and performing electroless plating with a metal-containing plating solution to obtain ceramic particles coated by the coating powder-metal coating.

[0035] S103 , casting the ceramic particles and the metal matrix coated with the coating powder-metal coating ...

example 1

[0041] Step 1, the ZTA pellets (ZTA p ) and water glass binder, add Ti powder with a particle size of 4 μm, and mechanically stir to obtain ZTA particles coated with coated powder Ti, namely ZTA p -Ti.

[0042] Step 2, place the ZTA p -Ti was mixed with PVA with a mass concentration of 3%, and dried at 60 °C for 1 min to obtain coated powder Ti and PVA coated ZTA p , namely ZTA p -Ti / PVA.

[0043] Step 3, place the ZTA p -Ti / PVA and Ni(Ac) 2 The activation solution was mixed and activated at 170 °C for 25 min to obtain activated ceramic particles ZTA p -Ti / PVA / Ni 2+ , where Ni(Ac) 2 The activation solution is Ni(Ac) 2 , NaH 2 PO 2 , C 2 H 6 O and H 2 O mass concentration ratio of 1:1:15:2 activation solution.

[0044] Step 4, configure CuNi plating solution. Nickel sulfate (NiSO 4 ·6H 2 The concentration of O) is 30g / L, copper sulfate (CuSO 4 ·5H 2 O) concentration can be 30g / L, sodium citrate (C 6 H 5 Na 3 O 7 • 2H 2 O) concentration can be 30g / L, sod...

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Abstract

The invention provides a method for coating ceramic particles and a preparation method of a composite material. The coating method comprises the following steps: mixing ceramic particles with an adhesive, adding coating powder, and stirring to obtain ceramic particles coated with the coating powder; mixing the ceramic particles coated with the coating powder with polyvinyl alcohol, and drying to obtain ceramic particles with the coating powder and the polyvinyl alcohol attached to the surfaces; and activating the ceramic particles of which the surfaces are attached with the coating powder and the polyvinyl alcohol, and carrying out chemical plating by using a plating solution after activation to obtain the ceramic particles coated with the coating powder-metal coating. The preparation method of the composite material comprises the following steps: preparing coating powder-metal coating coated ceramic particles; and carrying out pressureless infiltration treatment on the ceramic particles coated with the coating powder-metal coating and the metal matrix to obtain the composite material. According to the method, the surfaces of the ceramic particles can be better coated with the coating powder through the protection layer formed by the polyvinyl alcohol, a reaction type interface can be better formed in the compounding process of the ceramic particles and a metal matrix, and the bonding performance is better.

Description

technical field [0001] The invention relates to the technical field of ceramic composite materials, in particular to a method for coating ceramic particles and a method for preparing composite materials. Background technique [0002] Ceramic particles have the advantages of low density, high strength, wear resistance and corrosion resistance, and metal materials have good plasticity and toughness. Combining ceramic particles with metal materials will produce both the advantages of metal and the characteristics of ceramics. , ceramic / metal matrix composites with high toughness, high hardness and high oxidation resistance. [0003] However, the preparation of ceramic / metal matrix composites becomes quite difficult due to the poor wettability between ceramic particles and metal matrix. Attempts have been made to surface-treat the ceramic particles and then compound them with the metal matrix to enhance their wettability. Due to the advantages of simple process, uniform coatin...

Claims

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Application Information

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IPC IPC(8): B22F1/18B22F1/102C23C18/32C23C18/38C22C1/10C22C33/04C04B41/90C04B35/10C22C14/00C22C9/00C22C32/00
CPCB22F1/18B22F1/102C23C18/32C23C18/38C22C1/101C22C1/1036C22C33/04C04B41/90C04B41/52C04B41/009C22C14/00C22C9/00C22C32/00C22C1/1047C04B35/10C04B41/4545C04B41/5133C04B41/4535C04B41/4869C04B41/51
Inventor 蒋业华贺涵汝娟坚周荣
Owner KUNMING UNIV OF SCI & TECH
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