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Preparation method of high wear-resistant eutectic ceramic

A technology of eutectic ceramics and high wear resistance, which is applied in the field of preparation of high wear resistance eutectic ceramics, can solve the problems of low production efficiency, high equipment requirements, and difficulty in preparing larger-sized materials, and achieves good structure and stable performance. Sex, combined with good effect

Inactive Publication Date: 2010-12-08
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both of the above two methods require special directional solidification equipment, electron beam melting equipment or lasers, etc., and both have disadvantages such as low production efficiency, high requirements for equipment, and difficulty in preparing larger-sized materials.

Method used

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  • Preparation method of high wear-resistant eutectic ceramic
  • Preparation method of high wear-resistant eutectic ceramic

Examples

Experimental program
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Embodiment 1

[0020] This embodiment provides a method for preparing high wear-resistant eutectic ceramics. Using commercially available Al 2 o 3 and ZrO 2 (3Y) Nanopowders, the average particle diameter of each powder is less than 100 nanometers. The proportion of the sintered body obtained after sintering is Al 2 o 3 : ZrO 2 (3Y)=40:60, the proportion is the molar ratio; the two powders are mixed evenly in proportion to obtain the binary composite powder. The obtained composite powder was vacuum hot-pressed sintered in a ZRY-100 vacuum hot-pressed sintering furnace. During the sintering process, high-strength graphite was used as the mold material. The sintering temperature was 1500 ° C, the sintering pressure was 30 MPa, and the hot-pressing holding time was 30 minutes. That is, a cylindrical nanocomposite ceramic sintered body is obtained, which is used as the ceramic blank 5 in the next step.

[0021] The fusion forming process provided in this embodiment is as follows: put the ...

Embodiment 2

[0023] This embodiment provides a method for preparing binary eutectic multiphase ceramics. Using commercially available Al 2 o 3 and ZrO 2 (3Y) nano powder, the average particle size of each powder is less than 100 nanometers, and its proportion meets the requirement that the composition of the sintered body after sintering is Al 2 o 3 : ZrO 2 (3Y)=49:51, and the proportioning ratio is molar ratio. The two powders are uniformly mixed in proportion, and then dried and ground to obtain a binary nanocomposite powder. The obtained composite powder was subjected to cold isostatic pressing treatment in a cold isostatic pressing machine, the pressure of the isostatic pressing treatment was 200MPa, and the holding time was 5min; then it was sintered without pressure in a box-type resistance furnace, and the sintering temperature was 1550°C , holding time 60min. That is, a sheet-shaped multiphase ceramic sintered body with a thickness of 3 mm and a diameter of 30 mm was obtaine...

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Abstract

The invention provides a preparation method of high wear-resistant eutectic ceramic, belonging to the technical field of new material preparation, wherein the eutectic ceramic comprises Al2O3-ZrO2(3Y). The preparation method of the eutectic ceramic comprises the following steps: firstly acquiring a ceramic sintered body with a certain shape as a blank for preparing the eutectic ceramic, and finally obtaining the high wear-resistant eutectic ceramic by a high-temperature melting method under the condition of vacuum. In the method, mol content of Al2O3 in the eutectic ceramic is 40%-49%, mol content of ZrO2(3Y) is 51%-60%, and average particle size of the original powder is less than 100 nanometers; and sintering temperature of the eutectic ceramic is 1400-1550 DEG C, melting temperature is 1850-1950 DEG C, and melting holding time is 30-60min. The effect and benefit of the invention is that the preparation method of the eutectic ceramic is simple. The preparation method of the invention has the advantages of low price of main equipment, easy implementation, simplicity and capability of producing large-sized materials; and the obtained eutectic ceramic has high-temperature resistance and high wear resistance.

Description

technical field [0001] The invention belongs to the technical field of new material preparation and relates to a preparation method of high wear-resistant eutectic ceramics. Background technique [0002] With the development of science and technology, some high-end equipment put forward higher requirements on the wear resistance of materials, especially in harsh environments, such as: high temperature, strong corrosion and other environments, such as the nozzle of an aero-engine , Throat lining, diaphragm, combustion chamber, etc. Binary eutectic ceramics have the characteristics of high hardness, high wear resistance, and high temperature resistance. Long-term service in strong alkaline environment. [0003] Binary eutectic ceramics is a kind of artificial synthetic material with excellent performance. Since the material with eutectic composition grows through melting and becomes a worm-like or fibrous three-dimensional network eutectic structure, eutectic self-generated ...

Claims

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Application Information

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IPC IPC(8): C04B35/653C04B35/10C04B35/48
Inventor 陈国清祖宇飞付雪松周文龙
Owner DALIAN UNIV OF TECH
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