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Preparation method of YSZ ceramic powder for plasma spraying

A technology of ceramic powder and plasma, which is applied in the field of ceramic powder processing, can solve the problems of uneven distribution of powder and coating, and achieve the effects of uniform distribution, simple equipment and low production cost

Active Publication Date: 2014-10-08
XIAN AEROSPACE COMPOSITE MATERIALS INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can eliminate the traditional process factor Y 2 o 3 Non-uniform distribution leading to monoclinic phase problems in powders and coatings

Method used

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  • Preparation method of YSZ ceramic powder for plasma spraying
  • Preparation method of YSZ ceramic powder for plasma spraying
  • Preparation method of YSZ ceramic powder for plasma spraying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation method of the present embodiment plasma spraying YSZ ceramic powder comprises the following steps:

[0035] Step 1. Mix the yttrium salt and the zirconium salt uniformly according to the molar ratio of Y:(Y+Zr)=8:100, then add deionized water and stir until the yttrium salt and the zirconium salt are completely dissolved to obtain a mixed solution; the yttrium salt It is a water-soluble trivalent yttrium salt, preferably yttrium chloride or yttrium nitrate; the zirconium salt is a water-soluble tetravalent zirconium salt, preferably zirconium tetrachloride, zirconium nitrate or zirconium oxychloride; the yttrium in the mixed solution The sum of the molar concentration of the substance of the salt and that of the zirconium salt is 0.5mol / L; the yttrium salt adopted in the present embodiment is yttrium chloride; the zirconium salt adopted is zirconium tetrachloride;

[0036] Step 2, using ammonia water with a mass percentage concentration of 28% as a preci...

Embodiment 2

[0045] The preparation method of the present embodiment plasma spraying YSZ ceramic powder comprises the following steps:

[0046] Step 1. Mix the yttrium salt and zirconium salt according to the molar ratio of Y:(Y+Zr)=7.5:100, and then add deionized water and stir until the yttrium salt and zirconium salt are completely dissolved to obtain a mixed solution; the yttrium salt It is a water-soluble trivalent yttrium salt, preferably yttrium chloride or yttrium nitrate; the zirconium salt is a water-soluble tetravalent zirconium salt, preferably zirconium tetrachloride, zirconium nitrate or zirconium oxychloride; the yttrium in the mixed solution The sum of the molar concentration of the substance of the salt and that of the zirconium salt is 0.8mol / L; the yttrium salt adopted in the present embodiment is yttrium nitrate; the zirconium salt adopted is zirconium nitrate;

[0047] Step 2, using ammonia water with a mass percentage concentration of 25% as a precipitating agent to c...

Embodiment 3

[0054] The preparation method of the present embodiment plasma spraying YSZ ceramic powder comprises the following steps:

[0055] Step 1. Mix the yttrium salt and zirconium salt according to the molar ratio of Y:(Y+Zr)=8.5:100, and then add deionized water and stir until the yttrium salt and zirconium salt are completely dissolved to obtain a mixed solution; the yttrium salt It is a water-soluble trivalent yttrium salt, preferably yttrium chloride or yttrium nitrate; the zirconium salt is a water-soluble tetravalent zirconium salt, preferably zirconium tetrachloride, zirconium nitrate or zirconium oxychloride; the yttrium in the mixed solution The sum of the molar concentration of the salt and the molar concentration of the zirconium salt is 0.1mol / L; the yttrium salt adopted in the present embodiment is yttrium nitrate; the zirconium salt adopted is zirconium oxychloride;

[0056] Step 2, using ammonia water with a mass percentage concentration of 30% as a precipitating agen...

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Abstract

The invention provides a preparation method of YSZ ceramic powder for plasma spraying, which comprises the following steps: 1. proportionally adding yttrium salt and zirconium salt into deionized water, and stirring to completely dissolve the yttrium salt and zirconium salt, thereby obtaining a mixed solution; 2. carrying out coprecipitation treatment, filtering and drying to obtain a solid mixture; 3. carrying out hydrothermal reaction on the solid mixture to obtain a hydrothermal reaction product; 4. filtering the hydrothermal reaction product, washing, drying, and uniformly mixing deionized water and an adhesive to obtain a slurry; 5. carrying out spray drying treatment to obtain granules; and 6. sintering the granules, and screening to obtain the YSZ ceramic powder for plasma spraying. The YSZ ceramic powder prepared by the method is a complete square phase structure, has the characteristics of uniform distribution of yttrium oxide, high solid solution alloying of yttrium oxide and zirconium dioxide, and the like, is simple in equipment in the technical process, is not related to high temperature and mechanical crushing in the whole production process, and is low in production cost.

Description

technical field [0001] The invention belongs to the technical field of ceramic powder processing, and in particular relates to a preparation method of YSZ ceramic powder for plasma spraying. Background technique [0002] Zirconia (ZrO 2 ) has a high melting point (~2700°C), high creep temperature (~2400°C), excellent high-temperature thermal stability and extremely low thermal conductivity (~1w / m·k), and is widely used in rocket engines Nozzles, aero-engine and gas turbine combustion chambers, blades and other parts of the thermal insulation protective coating. Use ZrO 2 The coating can not only reduce the working temperature of the components and prolong the service life of the components, but also increase the working temperature of the aero-engine or gas turbine on the basis of ensuring the service life of the components, thereby improving the thrust-to-weight ratio of the aero-engine or the thermal efficiency of the gas turbine. [0003] Depending on the temperature, ...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/626
Inventor 李飞崔红刘勇琼张智高勇王政高波
Owner XIAN AEROSPACE COMPOSITE MATERIALS INST
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