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Connecting method for titanized Al2O3 ceramic and Ti ring in manmade retina

A connection method and retinal technology, which can be used in manufacturing tools, welding equipment, metal processing equipment, etc., can solve problems such as difficulty in realization, and achieve the effects of good connection strength, dense interface organization, and great application prospects.

Active Publication Date: 2017-01-04
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the titanium-coated Al in the artificial retina structure 2 o 3 The connection structure of ceramics and titanium rings must not only ensure that the brazing material is biocompatible, that is, non-toxic and harmless to the human body, but also realize the brazing process at a relatively low temperature, which is difficult to achieve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: Titanium Al plating in an artificial retina 2 o 3 The connection method of ceramic and titanium ring, it comprises the following steps:

[0020] (1), the titanium-plated Al to be connected 2 o 3 Ultrasonic cleaning of ceramic and titanium rings in acetone for 10 minutes;

[0021] (2) Put the Ti foil on the titanium-plated Al to be connected 2 o 3 Between the connecting surface of the ceramic and the titanium ring, it is assembled into a titanium-plated Al 2 o 3 Ceramic / Ti foil / titanium ring assembly, where the Ti foil is 50 μm thick and 99.99% pure;

[0022] (3), place the assembly obtained in step (2) in a vacuum heating furnace, apply a pressure of 4MPa, and when the vacuum degree reaches 1.5×10 -3 At Pa, turn on the heating, control the heating rate to 20°C / min, raise the temperature to 950°C, then keep it warm for 60 minutes, then control the cooling rate to 5°C / min, cool to 300°C, and then cool with the furnace to complete the titanium plating...

Embodiment 2

[0024] Embodiment 2: Titanium Al plating in an artificial retina 2 o 3 The connection method of ceramic and titanium ring, it comprises the following steps:

[0025] (1), the titanium-plated Al to be connected 2 o 3 Ultrasonic cleaning of ceramic and titanium rings in acetone for 5 minutes;

[0026] (2) Put the Ti foil on the titanium-plated Al to be connected 2 o 3 Between the connecting surface of the ceramic and the titanium ring, it is assembled into a titanium-plated Al 2 o 3 Ceramic / Ti foil / titanium ring assembly, where the Ti foil is 10 μm thick and 99.99% pure;

[0027] (3), place the assembly obtained in step (2) in a vacuum heating furnace, apply a pressure of 1MPa, and when the vacuum degree reaches 2.0×10 -3At Pa, turn on the heating, control the heating rate to 30°C / min, raise the temperature to 850°C, then keep it warm for 120min, then control the cooling rate to 3°C / min, cool to 300°C, and then cool with the furnace to complete the titanium plating al ...

Embodiment 3

[0029] Embodiment 3: Coating titanium Al in an artificial retina 2 o 3 The connection method of ceramic and titanium ring, it comprises the following steps:

[0030] (1), the titanium-plated Al to be connected 2 o 3 Ultrasonic cleaning of ceramic and titanium rings in acetone for 8 minutes;

[0031] (2) Put the Ti foil on the titanium-plated Al to be connected 2 o 3 Between the connecting surface of the ceramic and the titanium ring, it is assembled into a titanium-plated Al 2 o 3 Ceramic / Ti foil / titanium ring assembly, where the Ti foil has a thickness of 120 μm and a purity of 99.99%;

[0032] (3), place the assembly obtained in step (2) in a vacuum heating furnace, apply a pressure of 10MPa, and when the vacuum degree reaches 1.3×10 -3 At Pa, turn on the heating, control the heating rate to 10°C / min, raise the temperature to 1150°C, then keep it warm for 30 minutes, then control the cooling rate to 10°C / min, cool to 300°C, and then cool with the furnace to complete ...

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Abstract

The invention relates to a connecting method for titanized Al2O3 ceramic and a Ti ring in a manmade retina. The to-be-connected titanized Al2O3 ceramic and the to-be-connected Ti ring are placed in acetone to be subjected to ultrasonic cleaning for 5 min -10 min; then, a Ti foil piece is arranged between connecting faces of the to-be-connected titanized Al2O3 ceramic and the to-be-connected Ti ring, a titanized Al2O3 ceramic / Ti foil piece / Ti ring assembling piece is assembled, the obtained assembling piece is placed in a vacuum heating furnace, the exerted pressure ranges from 1 MPa to 10 MPa, when the vacuum degree reaches (1.3-2.0)*10-3 Pa, the temperature rise speed is controlled to range from 10 DEG C / min to 30 DEG C / min, the temperature is increased to range from 850 DEG C to 1,150 DEG C, then heat preservation is conducted for 30 min to 120 min, then the cooling speed is controlled to range from 3 DEG C / min to 10 DEG C / min, cooling is conducted to 300 DEG C, furnace cooling is conducted later, and then connection of the titanized Al2O3 ceramic with the Ti ring is finished. An obtained titanized Al2O3 ceramic / Ti ring connector is dense in structure, and air tightness is good.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to an artificial retina coated with titanium Al 2 o 3 The connection method of ceramic and titanium ring. Background technique [0002] Titanium and titanium alloys are widely used in various fields because of their high strength, good corrosion resistance and heat resistance. Al 2 o 3 Ceramics have good mechanical strength, high temperature resistance and stable chemical properties, making Al 2 o 3 Ceramics have become a kind of ceramics that are widely used in medicine, chemical industry, electronic components, vacuum devices and other fields. Titanium and titanium alloys and Al 2 o 3 Ceramic connecting structural parts are also often used in some important structures. [0003] The artificial retina uses electronic devices to replace the non-functional retina, and uses electric current to stimulate the optic nerve that is still intact to help users obtain basic vision. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/008B23K1/20
CPCB23K1/0008B23K1/008B23K1/206
Inventor 刘多宋晓国冯吉才曹健牛红伟张丽霞
Owner HARBIN INST OF TECH AT WEIHAI
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