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A kind of YSZ ceramic granulation powder for plasma spraying and preparation method thereof

A granulated powder and plasma technology, which is applied in the field of YSZ ceramic granulated powder for ion spraying and its preparation, can solve the problems of uneven service life of thermal barrier coatings, affecting the stability of powder performance, and increasing the cost of wastewater treatment. , to achieve the effect of improving batch performance stability, uniform service life and stable structure

Active Publication Date: 2020-07-28
INNER MONGOLIA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the co-precipitation method will introduce a large amount of polluting ions. The washing process not only requires a large amount of deionized water, but also causes environmental pollution and increases the cost of wastewater treatment. Moreover, some acid ions will inevitably remain in the powder prepared by the co-precipitation method. It will seriously affect the performance stability of the powder, which will make the service life of the prepared thermal barrier coating uneven

Method used

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  • A kind of YSZ ceramic granulation powder for plasma spraying and preparation method thereof
  • A kind of YSZ ceramic granulation powder for plasma spraying and preparation method thereof
  • A kind of YSZ ceramic granulation powder for plasma spraying and preparation method thereof

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preparation example Construction

[0035] The invention provides a preparation method of YSZ ceramic granulation powder for plasma spraying, comprising the following steps:

[0036] (1) providing a mixed raw meal comprising yttrium oxide and zirconia; the particle size of the mixed raw meal is 0.5-4 μm;

[0037] (2) mixing the mixed raw meal with starch, and performing high-temperature roasting to obtain YSZ clinker; the temperature of the high-temperature roasting is 1350-1550°C;

[0038] (3) the YSZ clinker that described step (2) is obtained is mixed with dispersant and water, carries out ball milling treatment, obtains ball milling slurry;

[0039] (4) Sand milling the ball mill slurry obtained in the step (3) to obtain a sand mill slurry;

[0040] (5) Mix the sand mill slurry obtained in the step (4) with a binder, and granulate to obtain YSZ ceramic granulation powder for plasma spraying.

[0041] In the mixed raw meal comprising yttrium oxide and zirconia provided by the present invention, the mass rat...

Embodiment 1

[0074] Based on the total mass of zirconia and yttrium oxide as 1000 parts, accurately weigh 940 parts of zirconia, 60 parts of yttrium oxide, and 2 parts of dispersant ammonium methacrylate, add deionized water to adjust the oxidation ratio in the mixed slurry The mass sum of zirconium and yttrium oxide is 55% of the total mass of zirconia, yttrium oxide and deionized water. The material is ball milled for 2 hours through a stirring ball mill. The grinding body is a zirconia ball with a particle size of 3-4mm, and the ball milling speed is 160r / min .

[0075] The slurry after stirring ball milling was spray-dried, the atomization frequency was adjusted to 45 Hz, the air inlet temperature was 240° C., and the air outlet temperature was 90° C. to obtain yttrium oxide zirconia mixed raw meal.

[0076] Accurately weigh 1,000 parts of yttrium oxide and zirconia mixed raw material and 20 parts of starch, mix them thoroughly, and then sinter at 1350°C for 6 hours to obtain YSZ clink...

Embodiment 2

[0082] Calculate with the total mass of zirconia and yttrium oxide as 1000 parts, accurately weigh 930 parts of zirconia, 70 parts of yttrium oxide, and 4 parts of dispersant ammonium polyacrylate, add deionized water, and adjust the zirconia and yttrium in the mixed slurry. The mass sum of yttrium oxide is 58% of the total mass of zirconia, yttrium oxide and deionized water. The material is milled for 3 hours by a stirring ball mill. The grinding body is a zirconia ball with a particle size of 4-5mm. The milling speed is 150r / min.

[0083] The slurry after stirring ball milling was directly dried in an electric oven at 90° C. for 12 hours to obtain a mixed raw meal of yttrium oxide and zirconia oxide.

[0084] Accurately weigh 1,000 parts of yttrium oxide and zirconia mixed raw material and 30 parts of starch, mix them thoroughly, and then sinter at 1400°C for 5 hours to obtain YSZ clinker. The XRD analysis of the obtained YSZ clinker shows that the YSZ clinker obtained by hi...

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Abstract

The invention provides YSZ ceramic pelleting powder used for plasma spraying and a preparing method thereof. A mixed raw material containing yttrium oxide and zirconium oxide and starch are mixed androasted at the high temperature of 1350-1550 DEG C to obtain YSZ chamotte; the obtained YSZ chamotte, dispersant and water are mixed, ball-milling treatment is conducted on the mixed material to obtain ball milling slurry; sanding treatment is conducted on the obtained chamotte slurry, the obtained sanding slurry is mixed with binder, the mixed material is pelleted to obtain the YSZ ceramic pelleting powder used for plasma spraying. Zirconium oxide and yttrium oxide solid-phase reaction is achieved in the high-temperature roasting process to obtain YSZ with partially stable yttrium oxide, andYSZ is stable in performance; acid radical ions are not introduced, the high-temperature roasting temperature is high, micro acid radical ions can be burnt out while solid-phase reaction is conductedfully, and the batch performance of the power is improved.

Description

technical field [0001] The invention relates to the technical field of ceramic powder, in particular to a YSZ ceramic granulated powder for plasma spraying and a preparation method thereof. Background technique [0002] Plasma sprayed thermal barrier coatings are widely used in aviation, aerospace, machinery, military and other fields, among which Y 2 o 3 Partially stabilized ZrO 2 (YSZ) has become the most popular ceramic material for thermal barrier coatings today due to its high melting point, low thermal conductivity, relatively high thermal expansion coefficient, and good corrosion resistance. [0003] With the rapid development of science and technology, the working conditions on the surface of high-temperature components such as turbine blades, steam turbine combustors, and hot-end components of weaponry propulsion systems are becoming more and more harsh. The thermal barrier obtained by plasma spraying conventional micron-sized ceramic powders The performance of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/626
CPCC04B35/48C04B35/6269C04B35/62695C04B2235/3225C04B2235/5427C04B2235/5436
Inventor 宋希文谢敏包金小周芬郜建全张永和郭文荣
Owner INNER MONGOLIA UNIV OF SCI & TECH
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