Low-temperature quick welding method for zirconia or zirconia-based composite materials

A zirconia-based, composite material technology, used in welding equipment, welding/welding/cutting items, resistance welding equipment, etc., and can solve problems such as low current/voltage

Inactive Publication Date: 2016-03-02
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The document "Electricfield assisted bonding of ceramics [J]. Materials Science and Engineering A, 2000, 287: 159–170." uses electric field assisted welding, but due to the small current / voltage it uses, it does not reach the critical value, so its welding behavior is different from that of ordinary welding without electric field. Auxiliary welding is similar and still needs to be performed at a higher temperature (≥1200°C) and for a longer time (≥1 hour)

Method used

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  • Low-temperature quick welding method for zirconia or zirconia-based composite materials
  • Low-temperature quick welding method for zirconia or zirconia-based composite materials
  • Low-temperature quick welding method for zirconia or zirconia-based composite materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1: Polishing the surface of the sintered dense zirconia or zirconia-based composite material to below 1 μm;

[0024] Step 2: Closely stick the surfaces of zirconia or zirconia-based composite materials to be welded together, and apply a pressure of 3MPa, that is, the applied pressure is equal to the compressive strength multiplied by the welding area;

[0025] Step 3: Heating until the welding temperature is 700°C; the heating method adopts radiation heating, laser heating or sintering furnace heating, or other heating methods

[0026] Step 4: Apply a current density of 350mA / mm to the welded part 2 and keep it for 10 minutes to complete the welding of zirconia or zirconia-based composite materials; the current of the current density not less than the critical value is: the current density not less than the critical value multiplied by the area to be welded is equal to the applied during operation current value.

Embodiment 2

[0028] Step 1: Polishing the surface of the sintered dense zirconia or zirconia-based composite material to below 1 μm;

[0029] Step 2: Closely stick the surfaces of zirconia or zirconia-based composite materials to be welded together, and apply a pressure of 0.5 MPa, that is, the applied pressure is equal to the compressive strength multiplied by the welding area;

[0030] Step 3: Heating until the welding temperature is 700°C; the heating method adopts radiation heating, laser heating or sintering furnace heating, or other heating methods

[0031] Step 4: Apply a current density of 450mA / mm to the welded part 2 and keep it for 10 minutes to complete the welding of zirconia or zirconia-based composite materials; the current of the current density not less than the critical value is: the current density not less than the critical value multiplied by the area to be welded is equal to the applied during operation current value.

Embodiment 3

[0033] Step 1: Polishing the surface of the sintered dense zirconia or zirconia-based composite material to below 1 μm;

[0034] Step 2: Closely stick the surfaces of zirconia or zirconia-based composite materials to be welded together, and apply a pressure of 1 MPa, that is, the applied pressure is equal to the compressive strength multiplied by the welding area;

[0035] Step 3: heating until the welding temperature is 600°C; the heating method adopts radiation heating, laser heating or sintering furnace heating, or adopts other heating methods

[0036] Step 4: Apply a current density of 450mA / mm to the welded part 2 and keep it for 5 minutes to complete the welding of zirconia or zirconia-based composite materials; the current of the current density not less than the critical value is: the current density not less than the critical value multiplied by the area to be welded is equal to the applied during operation current value.

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Abstract

The invention relates to a low-temperature quick welding method for zirconia or zirconia-based composite materials. According to the facts that zirconia or zirconia-based composite materials can perform mass transfer through spreading, and then diffusion bonding between the materials is formed, quick mass transfer can be achieved in the zirconia or zirconia-based composite materials when the density of current passing the materials is larger than a critical value. The critical electric field assisting method is adopted, and quick welding between zirconia materials or between zirconia and zirconia-based composite materials or between the zirconia-based composite materials is achieved by applying preset pressure at the temperature of 500-1200 DEG C and with the density larger than the critical current density.

Description

technical field [0001] The invention belongs to the welding technology of zirconia or zirconia-based composite materials, and specifically relates to a low-temperature rapid welding method for zirconia or zirconia-based composite materials. A method to achieve rapid welding between materials with the aid of the minimum current density required for rapid welding. Background technique [0002] For nearly half a century, with the deepening and development of theoretical research on ceramic materials, ZrO 2 High-performance structural ceramics, one of the representatives of ceramics, are getting more and more attention in the field of engineering technology. Zirconia (ZrO 2 ) Ceramics are a new type of structural ceramics developed in the 1970s with great application prospects. Because of their excellent mechanical properties, high temperature resistance, and corrosion resistance, they have attracted much attention from scholars at home and abroad. At the same time, although ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/02B23K11/16B23K11/34B23K103/16
CPCB23K11/02B23K11/16B23K11/34B23K2103/16
Inventor 王一光刘金铃夏军波刘佃光
Owner NORTHWESTERN POLYTECHNICAL UNIV
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