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Method for preparing metal ceramic composite powder body suitable for hot spraying

A metal-ceramic composite, thermal spraying technology, applied in the direction of coating, can solve the problems of reducing coating hardness, low friction coefficient, low shear strength, etc., to achieve improved surface activity, high bulk density, good wearability Effect

Inactive Publication Date: 2008-07-09
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these non-metallic phases have low hardness, low shear strength and low friction coefficient, and the existence of holes will reduce the hardness of the coating

Method used

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  • Method for preparing metal ceramic composite powder body suitable for hot spraying
  • Method for preparing metal ceramic composite powder body suitable for hot spraying
  • Method for preparing metal ceramic composite powder body suitable for hot spraying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method for producing nickel-coated boron nitride cermet composite powder comprises the following steps: take 26.3g of hexagonal boron nitride powder for pretreatment, add 200ml of 10% NaOH solution to boil for 30 minutes, and then wash several times, Add 200ml of sensitizing solution and stir, sensitize for about 5 minutes, after washing several times, add 5ml of activating solution for about 20 minutes, wash several times, dry and set aside.

[0027] Account for 95% of the total mass of the powder in which nickel metal accounts for 95% of the nickel sulfate solution with a concentration of 50g / l, the ammonium sulfate solution with a concentration of 150g / l, and the ammoniacal liquor according to the ratio of nickel to ammonia 1:2, totally 10L.

[0028] Weigh 2g of anthraquinone as an active agent, put it into a 10L autoclave together with the prepared mixed solution and activated hexagonal boron nitride for coating, capping, exhaust, and heating. When t...

Embodiment 2

[0031] The preparation method for producing nickel-coated boron nitride cermet composite powder comprises the following steps: take 55.6g of hexagonal boron nitride powder, add 200ml of 10% NaOH solution and boil for 30min, then wash several times, add sensitizing 200ml of activating solution and stirred, sensitization treatment for about 5min, after washing several times, add 5ml activation solution for about 20 minutes, wash several times, dry and set aside.

[0032] According to the ratio of metallic nickel accounting for 90% in the total mass of the powder, prepare a nickel sulfate solution with a concentration of 50g / l, an ammonium sulfate solution with a concentration of 150g / l, and ammoniacal liquor according to the ratio of nickel and ammonia 1:2, totally 10L.

[0033] Weigh 2g of anthraquinone as an active agent, put it into a 10L autoclave together with the prepared mixed solution and activated hexagonal boron nitride, seal the lid, exhaust, and heat. When the temper...

Embodiment 3

[0036] The preparation method for producing nickel-coated boron nitride cermet composite powder comprises the following steps: take 88.2g of hexagonal boron nitride powder, add 200ml of 10% NaOH solution and boil for 30min, then wash several times, add sensitizing 200ml of activating solution and stirred, sensitization treatment for about 5min, after washing several times, add 5ml activation solution for about 20 minutes, wash several times, dry and set aside.

[0037] According to the ratio of metallic nickel accounting for 85% in the total mass of the powder, prepare a nickel sulfate solution with a concentration of 50g / l, an ammonium sulfate solution with a concentration of 150g / l, and ammoniacal liquor according to the 1:2 ratio of nickel and ammonia, totally 10L.

[0038]Weigh 2g of anthraquinone, put it into a 10L autoclave together with the prepared mixed solution and activated hexagonal boron nitride, cover, exhaust, and heat. When the temperature rises to 145°C, 4 MPa...

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Abstract

The invention relates to a method for preparing nickel-coated kubonit cermet compound powder body with complete subsphaeroidal topography suitable for plasma spraying, supersonic speed flame spraying and hot spraying. The technical scheme includes the following steps: preparing NaOH liquor, sensitizing liquor and active liquor with a consistency of 1 to 20 percent; (2) carrying through preliminary treatment on hexagonal boron nitride ceramics powder, weighing the hexagonal boron nitride with a certain proportion and using the liquor prepared by step (1) to carry through the preliminary treatment; (3) preparing a reaction liquor;(4) simultaneously adding the hexagonal boron nitride after treated in step (2) and the reaction liquor prepared by step (3) into a high pressure reaction kettle to react, cooling, opening the kettle and discharging after the reaction is finished; (5) carrying through washing, filtering and drying after washing on the acquired powder body to get the nickel-coated kubonit powder body.

Description

technical field [0001] The invention relates to a preparation process and production method of a nickel-coated boron nitride cermet composite powder. The phase structure of the powder material is coated composite powder, which has high bulk density and good fluidity, and is suitable for plasma spraying and supersonic flame spraying. The novel powder material is particularly suitable for preparing the precursor of an abradable sealing and self-lubricating coating material, and can be used alone as an abradable and self-lubricating coating. Background technique [0002] In order to improve the efficiency of aero-engines and reduce fuel consumption, the clearance between the compressor, turbine tip and casing should be reduced as much as possible. Gas path sealing technology is an important means to improve engine performance. The abradable sealing coating has been applied in the aviation industry because of its simple production process, easy repair and adjustment performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02C04B35/5835C04B35/628
Inventor 刘景辉闫世凯杨中元汪礼敏张景怀林锋
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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