Method for braze-sealing of Al2O3 ceramic and titanium ring in artificial retina

A retinal and al2o3 technology, applied in welding equipment, manufacturing tools, eye implants, etc., can solve the problems of poor biocompatibility and failure to meet the conditions for the application of artificial retinal structures, and achieve the effect of great application prospects

Active Publication Date: 2016-05-25
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it is widely used to braze Al with Ag-based solder. 2 o 3 Ceramics and titanium alloys, however, the biocompatibility of the brazing interface of Ag-based solder is poor, which cannot meet the conditions for the application of artificial retinal structures, so the development of biocompatible solder to achieve Al 2 o 3 The connection between ceramic and titanium ring is very necessary

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: Al in a kind of artificial retina 2 o 3 Ceramic and titanium ring brazing sealing method, it comprises the following steps:

[0017] (1) Preparation of solder: In a planetary ball mill, mix Ti powder and Ni powder with a particle size of 20-400nm and a mass fraction of 6% and 94%, respectively, at a speed of 100-300 rpm. Next, ball mill for 0.5~2h to get TiNi solder;

[0018] (2), the titanium ring to be welded and Al 2 o 3 Ultrasonic cleaning of ceramics in acetone for 5 minutes;

[0019] (3) Mix the obtained TiNi solder with acetone to form a paste, and evenly coat the paste solder on the Al 2 o 3 On the surface of the ceramic to be connected, place the titanium ring on the coating layer to form the assembly to be welded, wherein the thickness of the paste solder coating layer is 50 μm;

[0020] (4) Place the assembly to be welded in step 3 in a vacuum heating furnace, and when the vacuum degree reaches (1.3~2.0)×10 -3 At Pa, turn on the heating,...

Embodiment 2

[0022] Embodiment 2: Al in a kind of artificial retina 2 o 3 Ceramic and titanium ring brazing sealing method, it comprises the following steps:

[0023] (1) Preparation of solder: In a planetary ball mill, mix Ti powder and Ni powder with a particle size of 20-400nm and a mass fraction of 85% and 15%, respectively, at a speed of 100-300 rpm. Next, ball mill for 0.5~2h to get TiNi solder;

[0024] (2), the titanium ring to be welded and Al 2 o 3 Ultrasonic cleaning of ceramics in acetone for 10 minutes;

[0025] (3) Mix the obtained TiNi solder with acetone to form a paste, and evenly coat the paste solder on the Al 2 o 3 Put the titanium ring on the coating layer on the surface of the ceramic to be connected to form the assembly to be welded, wherein the thickness of the coating layer of paste solder is 100 μm;

[0026] (4) Place the assembly to be welded in step 3 in a vacuum heating furnace, and when the vacuum degree reaches (1.3~2.0)×10 -3 At Pa, turn on the power...

Embodiment 3

[0028] Embodiment 3: Al in a kind of artificial retina 2 o 3 Ceramic and titanium ring brazing sealing method, it comprises the following steps:

[0029] (1) Preparation of solder: In a planetary ball mill, mix Ti powder and Ni powder with a particle size of 20-400nm and a mass fraction of 72% and 28%, respectively, at a speed of 100-300 rpm. Next, ball mill for 0.5~2h to get TiNi solder;

[0030] (2), the titanium ring to be welded and Al 2 o 3 Ceramics were ultrasonically cleaned in acetone for 8 minutes;

[0031] (3) Mix the TiNi solder with acetone to form a paste, and evenly coat the paste solder on the Al 2 o 3 Put the titanium ring on the coating layer on the surface of the ceramic to be connected to form the assembly to be welded, wherein the thickness of the coating layer of paste solder is 80 μm;

[0032] (4) Place the assembly to be welded in step 3 in a vacuum heating furnace, and when the vacuum degree reaches (1.3~2.0)×10 -3 At Pa, turn on the electric he...

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Abstract

The invention relates to a method for braze-sealing of an Al2O3 ceramic and a titanium ring in an artificial retina. Brazing filler metal is composed of, by mass, 6-85% of Ti powder and 15-94% of Ni powder. The granularity of the Ti powder and the Ni powder is 20-400 nm. The brazing filler metal obtained through ball milling is made into paste to be applied to a surface where the titanium ring and the Al2O3 ceramic are to be connected, a part to be welded is placed in a vacuum heating furnace, heating and heat insulation are conducted, and then welding is finished. By the adoption of the method, brazed connection of the titanium ring and the Al2O3 ceramic is achieved, and a reliable connector is obtained. The method is especially suitable for connection of the Al2O3 ceramic and the titanium ring in the artificial retina.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to an Al 2 o 3 Brazing and sealing method of ceramic and titanium rings. Background technique [0002] al 2 o 3 Ceramic has high strength, good wear resistance and corrosion resistance, and good thermal stability, so it is a widely used ceramic material. in Al 2 o 3 During the use of ceramics, it is often necessary to connect them with metal materials to form a ceramic / metal composite structure. Titanium and titanium alloys have the advantages of low density, high specific strength, good corrosion resistance, and good biocompatibility, and are ideal structural materials. [0003] In the artificial retina structure, Al 2 o 3 The ceramic / titanium ring composite structure is one of the important elements. By adding Al 2 o 3 The ceramic is connected with the titanium ring, and combined with other electronic components to realize the functions of stimulating the optic nerve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/008B23K1/20A61F9/08A61F2/14
CPCA61F2/14A61F9/08B23K1/008B23K1/203B23K1/206
Inventor 刘多牛红伟宋晓国冯吉才周英豪
Owner HARBIN INST OF TECH AT WEIHAI
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