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A cold spray in situ generation preparation method of ti2alc phase ceramic coating

An in-situ generation, ceramic coating technology, applied in pressure inorganic powder coating and other directions, can solve the problems of limited coating thickness, limited component size, high equipment requirements, short heating time, anti-oxidation and anti-corrosion performance Improve the effect of good coating quality

Active Publication Date: 2018-07-10
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of Ti 2 The cold spray in situ generation preparation method of AlC phase ceramic coating, in order to solve the existing vapor deposition method to prepare Ti 2 AlC coating has the problems of high equipment requirements, low production efficiency, limited size of protected parts, and limited coating thickness.

Method used

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  • A cold spray in situ generation preparation method of ti2alc phase ceramic coating
  • A cold spray in situ generation preparation method of ti2alc phase ceramic coating
  • A cold spray in situ generation preparation method of ti2alc phase ceramic coating

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Embodiment 1

[0032] TiH 2 , Al, TiC powder raw materials are n(TiH 2 ):n(Al):n(TiC)=1:1.1:1 ratio ingredients. TiH 2 Powder average particle size 800nm, purity 99.9wt%, Al powder average particle size 1 micron, purity 99.9wt%, TiC average particle size 500nm, purity 99.8wt%, raw material weight total 1Kg, stir with a mixer for 30min and mix well.

[0033]Add 15g of polyethylene glycol into 1.5Kg of absolute ethanol, heat and stir in a water bath to form a mixed solution. Add the uniformly mixed powder into the absolute ethanol-polyethylene glycol solution, and put it into a 3L stirring ball mill. In the ball mill mixing stage, the stirring speed is 300r / min, and the time is 30min. In the granulation stage, remove the grinding balls, adjust the stirring speed to 50 r / min, and maintain it until the atomization granulation process stops. The slurry is atomized and dried into a spherical composite powder of about 10 microns with an organic solvent-based laboratory spray dryer with an iner...

Embodiment 2

[0036] TiH 2 , Al, TiC powder raw materials are n(TiH 2 ):n(Al):n(TiC)=1:1.1:1 ratio ingredients. TiH 2 Powder average particle size 800nm, purity 99.9wt%, Al powder average particle size 1 micron, purity 99.9wt%, TiC average particle size 500nm, purity 99.8wt%, raw material weight total 1Kg, stir with a mixer for 30min and mix well.

[0037] Add 10g of polyethylene glycol into 1.5Kg of absolute ethanol, heat and stir in a water bath to form a mixed solution. Add the uniformly mixed powder into an anhydrous ethanol-polyethylene glycol solution, and put it into a 3L vibratory ball milling device with a vibration frequency of 50 Hz, an amplitude of 5 mm, and a ball milling time of 30 minutes. Pour out the ball-milled slurry and put it into a 5L beaker while stirring with a stirrer at a stirring speed of 50r / min, and maintain it until the atomization and granulation process stops. Dry the slurry with a centrifugal atomizing dryer with a closed-cycle function. A centrifugal at...

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Abstract

The invention relates to the field of ceramic coating and surface engineering, in particular to a method for preparing a Ti2AlC phase ceramic coating through cold spraying in-situ formation. The preparation method can be applied to an MAX phase material system capable of being synthesized through pressureless sintering and is specifically explained through the preparation method for the Ti2AlC phase ceramic coating. The preparation method comprises the steps that firstly, raw material powder for sintering and preparing the coating is mixed according to the required proportion; secondly, an organic solvent and an adhesive are added into the mixed powder to form slurry through wet ball grinding; thirdly, the slurry is dried into spherical raw material powder through a spray drying granulation method; fourthly, the spherical raw material powder is deposited on a base material where the coating needs to be prepared through a cold gas dynamic spraying device; and fifthly, the deposited base material and the coating are sintered under a vacuum atmosphere, and an in-situ formation MAX phase ceramic coating can be obtained. The method for preparing the MAX phase ceramic coating through cold spraying in-situ formation has the characteristics that the prepared coating is large in thickness and good in quality, the powder deposition speed is high, no MAX phase decomposition reaction occurs in the process, using is convenient, and the method is suitable for large scale application.

Description

technical field [0001] The invention relates to the field of ceramic coating and surface engineering, specifically a Ti 2 Cold spraying in situ generation preparation method of AlC phase ceramic coating. Background technique [0002] The MAX phase is a ternary machinable ceramic with a nano-layered structure. This ceramic has covalent bonds, metal bonds, and ionic bonds at the same time, so it has both the properties of ceramics and metals. Such as: high melting point, anti-oxidation and corrosion resistance of ceramic materials, metal conductivity, machinability, damage capacitance, thermal shock resistance and other properties, the above characteristics make MAX phase coatings expected to be used in high-temperature service parts, protective coatings, etc. Layers, conductive elements and other fields have been applied. However, in order to use the film structure material of MAX phase as a protective coating, the coating must have good quality and suitable thickness at th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/04
CPCC23C24/04
Inventor 柏春光谢曦崔玉友李铁藩熊天英杨锐
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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