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Method for bonding zirconium oxide sintered body

A sintered body and zirconia technology, which is applied in the field of bonding zirconia ceramic sintered bodies by using microwave local heating effect, can solve the problems of low joint strength, poor heat resistance, and long time consumption, and achieve high joint strength and good heat resistance , time-consuming effect

Inactive Publication Date: 2010-04-07
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional methods such as metal brazing and ceramic mesophase reaction sintering require overall heating of the entire processed component, which makes it almost impossible in practice if the processed component is of a super-large size, because in bonding During the process, the furnace size of the heating furnace used must be larger than the component to be processed, and the heating must be uniform in such a large space, and the entire bonding process takes a very long time, generally not less than 6 hours, so Such harsh conditions are difficult to achieve in production practice
[0003] Although the bonding method using polymer materials as the bonding phase has the characteristics of simple process, high efficiency and good formability, the joint obtained by bonding has relatively low strength and poor heat resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The bonded member is a cuboid of 20×20×5 mm, and the material is 85 zirconia sintered body. The configured mesophase is SiC: 60wt%; ZrO 2 : 40wt%. After ball milling for 2 hours, dry and grind into powder, pass through a 160-mesh sieve, and disperse with absolute ethanol to adjust the solid phase content to 45 wt%. The above-mentioned intermediate phase is evenly coated on the surface to be bonded of the zirconia ceramics, and the two bonding surfaces are connected and dried in the air. Apply 100g pressure to the dried component and carry out microwave treatment: irradiate with 1000W power of microwave for 20min, then switch to 2000W power and continue to irradiate for 20min, finally irradiate at 3000W for 15min, and cool down to room temperature naturally.

[0017] The scanning electron microscope observation of the bonding interface shows that the bonding interface is tightly bonded, and the mesophase and the matrix particles are interwoven and mosaic to form a good...

Embodiment 2

[0019] The bonded member is a cylinder with a diameter of 25 mm and a thickness of 7 mm, and the material is 95 zirconia sintered body. The configured mesophase is SiC: 80wt%; ZrO 2 : 20wt%. After ball milling for 2 hours, dry and grind into powder, pass through a 160-mesh sieve, disperse with absolute ethanol and adjust the solid phase content to 25 wt%. The above-mentioned intermediate phase is evenly coated on the zirconia surface to be bonded, and the two bonded surfaces are connected and dried in the air. Apply 150g pressure to the dried component and carry out microwave treatment: irradiate with 1000W power of microwave for 20min, then switch to 2000W power and continue to irradiate for 20min, finally irradiate at 3000W for 20min, and cool naturally to room temperature.

[0020] The scanning electron microscope observation of the bonded interface shows that the bonded interface is closely bonded, the thickness of the mesophase is almost 0 and it is difficult to identif...

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Abstract

The invention discloses a method for bonding sintered zirconium oxide. The method comprises the following steps: (1) preparing an intermediate phase by mixing 50-70wt% of SiC and 30-50wt% of ZrO2 as raw materials; (2) coating the intermediate phase on the bonding surface of zirconium oxide ceramic; and (3) performing microwave treatment. The bonding method of zirconium oxide ceramics has the advantages of simple process, high bonding strength, good heat resistance and high bonding efficiency. The bonding temperature is controlled by changing the formulation of the intermediate phase. Additionally, the method also has the advantages of short bonding process, high efficiency, low energy consumption and no strict requirement for equipment.

Description

technical field [0001] The invention relates to a method for bonding a zirconia sintered body, in particular to a method for bonding a zirconia ceramic sintered body by using microwave local heating effect. Background technique [0002] Zirconia ceramic products need an efficient and reliable ceramic bonding technology when preparing large-scale components, but there is still a lack of such a simple and feasible ceramic bonding technology. Traditional methods such as metal brazing and ceramic mesophase reaction sintering require overall heating of the entire processed component, which makes it almost impossible in practice if the processed component is of a super-large size, because in bonding During the process, the furnace size of the heating furnace used must be larger than the component to be processed, and the heating must be uniform in such a large space, and the entire bonding process takes a very long time, generally not less than 6 hours, so Such harsh conditions a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B37/00C04B35/48
Inventor 刘家臣何欣张鹏宇范巍
Owner TIANJIN UNIV