Al2O3/TiO2 precursor composite thermal spraying powder and preparation method thereof

A technology for thermal spraying powder and precursor, applied in the field of new Al2O3/TiO2 precursor composite thermal spraying powder and its preparation, can solve the problems of inability to obtain uniform powder, poor powder uniformity, poor fluidity, etc. Micro-hardness, good uniformity, uniform and pure product

Inactive Publication Date: 2018-08-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The melt crushing method can be used to prepare powders of brittle materials. The prepared powders have better uniformity and compactness, but the raw materials must be heated to a molten state, which consumes a lot of energy, and the prepared powders have many edges and corners, resulting in poor fluidity; In actual operation, the powder agglomeration method cannot obtain a uniform powder only by mechanical stirring, and the powder after granulation needs further heat treatment, which makes the method have problems such as poor powder uniformity and high energy consumption.

Method used

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  • Al2O3/TiO2 precursor composite thermal spraying powder and preparation method thereof
  • Al2O3/TiO2 precursor composite thermal spraying powder and preparation method thereof
  • Al2O3/TiO2 precursor composite thermal spraying powder and preparation method thereof

Examples

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Effect test

Embodiment 1

[0030] A new type of Al 2 o 3 / TiO 2 The preparation method of precursor composite thermal spraying powder comprises the steps:

[0031] (1) Weigh 1535.3g of absolute ethanol and 460.6g of deionized water, and use a magnetic stirrer to prepare a mixed solution; after weighing 174g of aluminum isopropoxide, slowly add it to the above mixed solution in a water bath at 90°C, Until the organic salt is completely dissolved and the solution is clear; configure 0.1mol / L dilute nitric acid solution, and slowly add it to the salt solution until the pH value of the solution is 5.5; continue to open and stir for 3 hours to evaporate the hydrolyzate, then condense and reflux for 12 hours, the alumina sol precursor obtained after natural cooling;

[0032] (2) Weigh 121.875g of absolute ethanol and 13.8125g of tetrabutyl titanate, slowly add tetrabutyl titanate into ethanol, shake evenly and put it into a separatory funnel; take the above-mentioned alumina sol precursor, and 1000r·min ...

Embodiment 2

[0037] A new type of Al 2 o 3 / TiO 2 The preparation method of precursor composite thermal spraying powder comprises the steps:

[0038] (1) Weigh 1535.3g of absolute ethanol and 460.6g of deionized water, and use a magnetic stirrer to prepare a mixed solution; after weighing 174g of aluminum isopropoxide, slowly add it to the above mixed solution in a 70°C water bath, Until the organic salt is completely dissolved and the solution is clear; configure 0.1mol / L dilute nitric acid solution, and slowly add it to the salt solution until the pH value of the solution is 5.5; continue to open and stir for 3 hours to evaporate the hydrolyzate, then condense and reflux for 12 hours, the alumina sol precursor obtained after natural cooling;

[0039] (2) Weigh 121.875g of absolute ethanol and 13.8125g of tetrabutyl titanate, slowly add tetrabutyl titanate into ethanol, shake evenly and put it into a separatory funnel; take the above-mentioned alumina sol precursor, and 1000r·min -1 ...

Embodiment 3

[0044] A new type of Al 2 o 3 / TiO 2 The preparation method of precursor composite thermal spraying powder comprises the steps:

[0045] (1) Weigh 1535.3g of absolute ethanol and 460.6g of deionized water, and use a magnetic stirrer to prepare a mixed solution; after weighing 174g of aluminum isopropoxide, slowly add it to the above mixed solution in a water bath at 90°C, Until the organic salt is completely dissolved and the solution is clear; configure 0.1mol / L dilute nitric acid solution, and slowly add it to the salt solution until the pH value of the solution is 4.5; continue to open and stir for 3 hours to evaporate the hydrolyzate, then condense and reflux for 12 hours, the alumina sol precursor obtained after natural cooling;

[0046] (2) Weigh 121.875g of absolute ethanol and 13.8125g of tetrabutyl titanate, slowly add tetrabutyl titanate into ethanol, shake evenly and put it into a separatory funnel; take the above-mentioned alumina sol precursor, and 1000r·min ...

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Abstract

The invention belongs to the field of thermal spraying preparation of functional coating layers, and in particular, relates to a novel Al2O3 / TiO2 precursor composite thermal spraying powder and a preparation method thereof. An Al2O3 / TiO2 precursor comprises AlOOH and Ti(OH)4 respectively with a mass ratio of 6.52:1 to 2.27:1; the particle size of the thermal spraying powder is 20-70 [mu]m, and themedian particle size D50 is 40 [mu]m. A sol-gel method is adopted, and organic metal salts are made into sols and then are compounded, so the uniformity of all components in the powder is effectivelyimproved; the method is applied to the preparation of an Al2O3 / TiO2 composite ceramic coating layer, TiO2 components are uniformly distributed, and thus the microhardness of the ceramic coating layeris effectively improved.

Description

technical field [0001] The invention belongs to the field of functional coatings prepared by thermal spraying, in particular to a novel Al 2 o 3 / TiO 2 Precursor composite thermal spray powder and preparation method thereof. Background technique [0002] With the further development of modern industrial technology, the performance and functional requirements of materials are facing increasingly stringent challenges. The material surface is an important carrier of material performance and function, and the use of thermal spraying technology to modify and protect its surface has become a key development direction that has attracted much attention in the field of equipment manufacturing today. In the face of increasingly complex wear and corrosion resistance conditions, a single metal or ceramic thermal spray coating can no longer meet the demand. Thermal sprayed Al 2 o 3 / TiO 2 (AT) composite ceramic coating is widely used in shipbuilding, textile, machinery, printing a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/626C04B35/624C04B35/622
CPCC04B35/10C04B35/62222C04B35/624C04B35/6261C04B35/62695C04B2235/3232C04B2235/96
Inventor 程旭东毛家玮丁思宇李永甲曾鲜
Owner WUHAN UNIV OF TECH
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