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Method for using rolling vibration mill to prepare nano zirconia/alumina composite powders

A technology of nano-zirconia and composite powder, which is applied in the direction of grain processing, etc., can solve the problems of introducing impurity product powder structure, high energy consumption, complicated preparation process, etc. simple effect

Inactive Publication Date: 2012-02-22
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention discloses a method for preparing nano zirconia / alumina composite material by rolling vibrating mill, the purpose of which is to overcome the shortcomings of traditional alumina zirconia composite powder preparation process, high energy consumption, introduction of impurities and the like. Defects in powder structure; the present invention utilizes rolling vibrating mill to realize compounding of alumina and zirconia under dry method room temperature condition

Method used

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  • Method for using rolling vibration mill to prepare nano zirconia/alumina composite powders
  • Method for using rolling vibration mill to prepare nano zirconia/alumina composite powders
  • Method for using rolling vibration mill to prepare nano zirconia/alumina composite powders

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A. 45-75 micron yttria-stabilized zirconia powder with a mass percentage of 85% particle size is uniformly mixed with 2-10 micron alumina powder with a mass percentage of 15% particle size;

[0022] B. Put the mixed powder into the rolling vibration mill, then put the rolling vibration mill into the glove box, then vacuumize the glove box and fill it with inert gas to balance the pressure in the glove box with the external atmospheric pressure , start running the roller vibration mill.

[0023] C. The rolling vibratory mill stops for one hour after running for 2, 4, 6, 8, 10, 13, 16, 19, 22 hours.

[0024] D. After the rolling vibration mill has been running for 26 hours, take the powder out of the glove box and collect it.

[0025] figure 1 The surface SEM image of the nano-zirconia / alumina composite powder prepared in Example 1, the magnification is 100,000 times, it can be seen from the figure that alumina has been embedded in some pores on the surface of zirconia,...

Embodiment 2

[0027] A. 90% by mass percentage of particle size is 45-75 micron yttria stabilized zirconia powder, and the powder is evenly mixed with 10% by mass percentage of alumina powder with a particle size of 2-10 microns;

[0028] B. Put the mixed powder into the rolling vibration mill, then put the rolling vibration mill into the glove box, then vacuumize the glove box and fill it with inert gas to balance the pressure in the glove box with the external atmospheric pressure , start running the roller vibration mill.

[0029] C. The rolling vibratory mill stops for one hour after running for 2, 4, 6, 8, 10, 13, 16, 19, 22, 26, and 30 hours.

[0030] D. After the rolling vibration mill has been running for 35 hours, take the powder out of the glove box and collect it.

[0031] figure 2 The SEM image of the surface of the nano-zirconia / alumina composite powder prepared in Example 2, the magnification is 100,000 times. Compared with Example 1, it is found that the surface of the pow...

Embodiment 3

[0033] A. 95% by mass percentage of particle size is 45-75 micron yttrium oxide stabilized zirconia powder, and the powder is evenly mixed with 5% by mass percentage of alumina powder with a particle size of 2-10 microns;

[0034] B. Put the mixed powder into the rolling vibration mill, then put the rolling vibration mill into the glove box, then vacuumize the glove box and fill it with inert gas to balance the pressure in the glove box with the external atmospheric pressure , start running the roller vibration mill.

[0035] C. The rolling vibratory mill stops for one hour after running for 2, 4, 6, 8, 10, 13, 16, 19, 22, 26, 30, 35, 40 hours.

[0036] D. After the rolling vibration mill has been running for 45 hours, take the powder out of the glove box and collect it.

[0037] image 3 The SEM image of the surface of the nano-zirconia / alumina composite powder prepared in Example 3, the magnification is 100,000 times. Compared with Example 1, it is found that the surface o...

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Abstract

A method for using a rolling vibration mill to prepare nano zirconia / alumina composite powders, which enables two oxide powder to be composited by using the rolling vibration mill under a dry method room temperature state. The specific steps are: evenly mixing zirconia powders with stable yttria, a mass percent of 85-97% and a grain size of 45-75 micrometers and aluminum oxide powders with a mass percent of 3-15% and a grain size of 2-10 micrometers; enabling the mixing powders to be input in the rolling vibration mill, enabling the rolling vibration mill in a glove box, vacuumizing the glove box and filling with inert gas, enabling the pressure in the glove box to be balanced with outside atmosphere pressure, and beginning to operate the rolling vibration mill; and enabling overall operating time of the rolling vibration mill to be 40-45 hours, operating according to an interval operating mode, and finally collecting products. The nano zirconia / alumina composite powders prepared by using the method can be directly applied to thermal spraying, has the advantages of being high in mechanical strength, excellent in toughness and thermal shock performance, simple in preparation method, low in consumption, green and environmental friendly and convenient in industrialization production.

Description

technical field [0001] The invention relates to a method for preparing nano zirconia / alumina composite powder by means of rolling vibrating mill, and belongs to the technical field of inorganic nonmetal nano powder preparation. Background technique [0002] Ceramic powder is widely used in industry because of its ability to prepare ceramic coatings with excellent properties such as wear resistance, oxidation resistance, and corrosion resistance. The traditional method is to prepare by thermal spraying and laser cladding technology, but most of the particles of traditional ceramic powder are in a completely molten state during spraying or cladding, so the coating has high porosity, high metastable phase content, and large residual stress. , The strength and toughness inside the coating are poor, which can easily lead to peeling and cracking between the ceramic coating and the substrate and inside the ceramic, resulting in failure of the coating, which seriously affects its ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C19/16C04B35/48C04B35/626
Inventor 孙寅章王树林曹德明
Owner UNIV OF SHANGHAI FOR SCI & TECH
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