Ceramic cladding powder and preparation method thereof

A technology of coated powder and ceramic powder, which is applied in the field of ceramic coated powder and its preparation, can solve the problems of increasing the aggregation and growth of ceramic phase grains, poor quality and performance of ceramic materials, and low service life, achieving low cost, And the effect of improving the service life and improving the yield

Inactive Publication Date: 2009-05-06
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the difference in density and particle size of the mixture prepared by this method, it is difficult for the cobalt or nickel powder to mix evenly with the ceramic powder, which makes it easier to produce a cobalt pool or a nickel pool during the sintering process, with a large porosity and increased ceramic phase crystals. The tendency of particles to aggregate and grow up, resulting in poor quality and performance of ceramic materials, and low service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The processing steps of the present embodiment are as follows:

[0031] (1) Pretreatment of ceramic powder

[0032] The ceramic powder is titanium carbonitride (Ti(C, N)) of Fisherman's mean particle size 800nm, and dispersant is dehydrated alcohol, and titanium carbonitride powder 85g, dehydrated alcohol 110mL (87g) are placed in the beaker, then Disperse with ultrasonic vibration for 2 hours;

[0033] (2) Preparation of plating solution

[0034] Prepare 500mL of plating solution with cobalt sulfate, ammoniacal liquor, alkylpolyglycoside (APG) and deionized water, in the plating solution, the concentration of cobalt sulfate is 0.4mol / L, and the concentration of ammoniacal liquor is 0.8mol / L, and alkylpolyglycoside ( APG) concentration is 0.1mol / L;

[0035] (3) Liquid phase reduction reaction

[0036] Under normal pressure, the 500mL plating solution prepared in step (2) was heated with a water bath to keep the temperature of the plating solution at 85°C, and the pH...

Embodiment 2

[0040] The processing steps of the present embodiment are as follows:

[0041] (1) Pretreatment of ceramic powder

[0042] The ceramic powder is tungsten carbide (WC) with a Fischer average particle size of 700nm, and the dispersant is acetone. Put 80g of tungsten carbide powder and 110mL (87g) of acetone in a beaker, and then disperse with ultrasonic vibration for 2 hours;

[0043] (2) Preparation of plating solution

[0044] Prepare 500 mL of plating solution with cobalt nitrate, ammonia, polyvinylpyrrolidone (PVP) and distilled water. In the plating solution, the concentration of cobalt nitrate is 0.1mol / L, the concentration of ammonia is 1.0mol / L, and the concentration of polyvinylpyrrolidone (PVP) 0.3mol / L;

[0045] (3) Liquid phase reduction reaction

[0046]Under normal pressure, the 500mL plating solution prepared in step (2) was heated with a water bath to keep the temperature of the plating solution at 80°C, and the pH value of the plating solution was adjusted to...

Embodiment 3

[0050] The processing steps of the present embodiment are as follows:

[0051] (1) Pretreatment of ceramic powder

[0052] The ceramic powder is titanium carbonitride (Ti(C,N)), tungsten carbide (WC) and tantalum carbide (TaC) with an average Fischer particle size of 1-5 μm. The dispersant is absolute ethanol. 800g of titanium carbonitride powder Put 60g of tungsten carbide powder, 10g of tantalum carbide powder, and 1500mL (1185g) of absolute ethanol in a beaker, and then disperse with ultrasonic vibration for 3 hours;

[0053] (2) Preparation of plating solution

[0054] Prepare 10000 mL of plating solution with cobalt chloride, ammonia, Tween 80 and deionized water. In the plating solution, the concentration of cobalt chloride is 1.0 mol / L, the concentration of ammonia is 2.0 mol / L, and the concentration of Tween 80 is 1.0 mol / L;

[0055] (3) Liquid phase reduction reaction

[0056] Under normal pressure, the 10000mL plating solution prepared in step (2) was heated with...

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Abstract

The invention relates to ceramic coating powder the ceramic phase of which is coated by a metallic phase cobalt or/and a metallic phase nickel. The metallic phase cobalt and the metallic phase nickel are obtained by means of a liquid phase reduction method; and the ceramic phase is at least one of titanium carbonitride, titanium carbide, titanium nitride, tungsten carbide, silicon carbide, niobium carbide, tantalum carbide, aluminum oxide, zirconium oxide, magnesium oxide, boron nitride and silicon nitride. A method for preparing the ceramic coating powder is the liquid phase reduction method to carry out a reduction reaction between cobalt or/and nickel ions in a plating solution to generate the metallic phase cobalt or/and nickel which is deposited on the surface of a ceramic core to form the ceramic coating powder; and the process steps are as follows: (1) pre-treatment of the ceramic powder; (2) preparation of the plating solution; (3) liquid-phase reduction reaction; and (4) plating post treatment.

Description

technical field [0001] The invention belongs to the field of composite ceramic materials, in particular to a ceramic coating powder and a preparation method thereof. Background technique [0002] A heterogeneous composite ceramic material composed of metal or alloy and one or several ceramic phases, it not only has the toughness, high thermal conductivity and good thermal stability of metal, but also has the high temperature resistance, corrosion resistance and resistance of ceramics. properties such as wear and tear. Therefore, its use is extremely extensive, involving almost all sectors of the national economy and various fields of modern technology, and plays an important role in the development of industry and the improvement of productivity. With the development of various thermal spraying technologies, coated composite powders are used as raw materials, and thermal spraying technology is used to prepare anti-corrosion, thermal barrier and sealing, corrosion resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/628
Inventor 刘颖叶金文廖立姜中涛涂铭旌
Owner SICHUAN UNIV
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