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High-temperature-resistant cermet material and preparation method thereof

A cermet, high-temperature-resistant technology, applied in the field of cermet materials, can solve the problems of low high-temperature resistance, poor heat-resistant strength, shortened service life, etc., and achieve the effect of improving performance and good high-temperature resistance

Inactive Publication Date: 2015-03-04
佛山市三水华纳陶瓷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Technical problem to be solved: In some equipment or machinery that are often exposed to high temperatures, such as engines and spark plugs, there are some cermet materials. The heat resistance of these cermet materials has a greater effect on its normal use, and the The high heat resistance strength will shorten its service life, and the high temperature resistant temperature of conventional cermet materials is low, so it is necessary to develop new high temperature resistant cermet materials and their preparation methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Take 22Kg of nickel oxide, 11Kg of magnesium oxide, 7Kg of zirconium diboride, 2Kg of thorium dioxide, 4Kg of bismuth oxide, 9Kg of zinc, 13Kg of copper, 4Kg of germanium, and 4Kg of iron by weight. 17Kg, mix the above metal and ceramic materials with high-speed mixing until uniform; (2) Mill the uniformly mixed materials with a ball mill, the ball-to-material ratio is 25:1, and the speed of the ball mill is 300r / min. The ball milling time is 5 hours; (3) After the ball milling, the cermet material will be pressed in a hot-pressed furnace at a high temperature, the heating rate is 70°C / min, the temperature in the furnace is raised to 780°C, and the temperature is kept at this temperature for 30min. After heat preservation, change the heating rate to 30°C / min, continue to increase the temperature in the hot-press furnace to 1610°C, the sintering time is 4.5h, the pressure of the hot-press furnace is 70MPa, and then cool down at a cooling rate of 50°C / min. It is prepa...

Embodiment 2

[0049] (1) Take 11Kg of nickel trioxide, 5Kg of magnesium oxide, 11Kg of zirconium diboride, 4Kg of thorium dioxide, 7Kg of bismuth oxide, 5Kg of zinc, 7Kg of copper, 2Kg of germanium and 2Kg of iron by weight. 12Kg, quickly mix the above metal and ceramic materials with high-speed mixing until uniform; (2) Mill the uniformly mixed materials with a ball mill, the ball-to-material ratio is 40:1, and the speed of the ball mill is 250r / min. The ball milling time is 3 hours; (3) After ball milling, the cermet material will be pressed in a hot-pressed furnace at a high temperature, the heating rate is 45°C / min, and the temperature in the furnace is raised to 720°C, and kept at this temperature for 15 minutes. After heat preservation, change the heating rate to 40°C / min, continue to increase the temperature in the hot-press furnace to 1520°C, sintering time is 2h, and the pressure in the hot-press furnace is 55MPa, and then cool at a cooling rate of 35°C / min. It is a high temperatur...

Embodiment 3

[0052] (1) Take 17Kg of nickel trioxide, 8Kg of magnesium oxide, 9Kg of zirconium diboride, 4Kg of thorium dioxide, 5Kg of bismuth oxide, 7Kg of zinc, 9Kg of copper, 3Kg of germanium and 3Kg of iron by weight. 14Kg, quickly mix the above metal and ceramic materials with high-speed mixing until uniform; (2) Mill the uniformly mixed materials with a ball mill, the ball-to-material ratio is 35:1, and the speed of the ball mill is 270r / min. The ball milling time is 4 hours; (3) After the ball milling, the cermet material will be pressed in a hot-pressed furnace at a high temperature. The heating rate is 60°C / min, and the temperature in the furnace is raised to 740°C, and kept at this temperature for 20 minutes. After heat preservation, change the heating rate to 35°C / min, continue to increase the temperature in the hot-press furnace to 1570°C, sintering time is 3h, and the pressure in the hot-press furnace is 65MPa, and then cool at a cooling rate of 40°C / min. It is a high tempera...

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Abstract

The invention belongs to the field of cermet materials, and discloses a high-temperature-resistant cermet material and a preparation method thereof. The high-temperature-resistant cermet material comprises 11-22 parts of nickel sesquioxide, 5-11 parts of magnesium oxide, 7-11 parts of zirconium diboride, 2-4 parts of thorium dioxide, 4-7 parts of bismuth oxide, 5-9 parts of zinc, 7-13 parts of copper, 2-4 parts of germanium and 12-17 parts of iron. The preparation method comprises the following steps: (1) quickly mixing metals and a ceramic material at high speed; (2) carrying out ball milling on the uniform mixture with a ball mill; (3) carrying out high-temperature press fitting on the cermet material subjected to ball milling in a hot-pressing furnace, heating the furnace to 720-780 DEG C, keeping the temperature, continuing heating the hot-pressing furnace to 1520-1610 DEG C, sintering, and cooling to obtain the high-temperature-resistant cermet material.

Description

technical field [0001] The invention belongs to the field of cermet materials, and relates to a cermet material and a preparation method thereof, in particular to a high temperature resistant cermet material and a preparation method thereof. Background technique [0002] In order to make ceramics resistant to high temperature and not easy to break, people added some metal powder to the clay for making ceramics, thus making cermets. Metal-based cermets are made by adding oxide fine powder to the metal matrix, also known as dispersion-reinforced materials. There are mainly sintered aluminum (aluminum-alumina), sintered beryllium (beryllium-beryllium oxide), TD nickel (nickel-thorium oxide) and other composite materials composed of one or several ceramic phases and metal phases or alloys. The generalized cermets also include refractory compound alloys, hard alloys, and metal-bonded diamond tool materials. The ceramic phase in cermet is an oxide or refractory compound with hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/00
CPCC22C29/12
Inventor 刘莉王爽邱晶
Owner 佛山市三水华纳陶瓷有限公司
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