CN105598542A - Method for braze-sealing of Al2O3 ceramic and titanium ring in artificial retina - Google Patents
Method for braze-sealing of Al2O3 ceramic and titanium ring in artificial retina Download PDFInfo
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- CN105598542A CN105598542A CN201610039480.1A CN201610039480A CN105598542A CN 105598542 A CN105598542 A CN 105598542A CN 201610039480 A CN201610039480 A CN 201610039480A CN 105598542 A CN105598542 A CN 105598542A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 57
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 210000001525 retina Anatomy 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000007789 sealing Methods 0.000 title claims abstract description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 229910052593 corundum Inorganic materials 0.000 title claims abstract description 13
- 229910001845 yogo sapphire Inorganic materials 0.000 title claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000005219 brazing Methods 0.000 claims abstract description 17
- 239000010936 titanium Substances 0.000 claims abstract description 12
- 238000000498 ball milling Methods 0.000 claims abstract description 3
- 229910000679 solder Inorganic materials 0.000 claims description 47
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 39
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 28
- 229910010380 TiNi Inorganic materials 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 14
- 239000011247 coating layer Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 8
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 238000005485 electric heating Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 238000003466 welding Methods 0.000 abstract description 2
- 239000000945 filler Substances 0.000 abstract 2
- 238000009413 insulation Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 5
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 210000001328 optic nerve Anatomy 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002207 retinal effect Effects 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/008—Soldering within a furnace
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/14—Eye parts, e.g. lenses or corneal implants; Artificial eyes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting in contact-lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/08—Devices or methods enabling eye-patients to replace direct visual perception by another kind of perception
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
- B23K1/203—Fluxing, i.e. applying flux onto surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
- B23K1/206—Cleaning
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Ophthalmology & Optometry (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- General Health & Medical Sciences (AREA)
- Cardiology (AREA)
- Transplantation (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Prostheses (AREA)
- Materials For Medical Uses (AREA)
Abstract
Description
技术领域 technical field
本发明属于焊接技术领域，具体涉及一种Al2O3陶瓷与钛环的钎焊封接方法。 The invention belongs to the field of welding technology, and in particular relates to a brazing and sealing method of Al2O3 ceramics and titanium rings.
背景技术 Background technique
Al2O3陶瓷的强度高、耐磨性和耐腐蚀性好，并且热稳定性能好，是一种应用广泛的陶瓷材料。在Al2O3陶瓷的使用过程中，常需要将其与金属材料连接，形成陶瓷/金属复合结构使用。钛及钛合金具有密度低、比强度高、抗腐蚀性能好、生物兼容性好等优点，是较为理想的结构材料。 Al 2 O 3 ceramics have high strength, good wear resistance and corrosion resistance, and good thermal stability, and are widely used ceramic materials. During the use of Al 2 O 3 ceramics, it is often necessary to connect it 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.
在人造视网膜结构中，Al2O3陶瓷/钛环复合结构是重要元件之一。通过将Al2O3陶瓷与钛环连接，并复合其他电子元器件共同实现刺激视神经、帮助使用者获得基本的视觉的功能。因此，将Al2O3陶瓷与钛环可靠连接，并获得组织致密、气密性好的连接接头具有重要意义。 In the artificial retina structure, Al 2 O 3 ceramic/titanium ring composite structure is one of the important elements. By connecting the Al 2 O 3 ceramics with the titanium ring, and compounding other electronic components, the functions of stimulating the optic nerve and helping users obtain basic vision are realized. Therefore, it is of great significance to reliably connect Al 2 O 3 ceramics to titanium rings, and to obtain joints with dense tissue and good airtightness.
目前，钎焊仍是连接陶瓷与金属的最有效方法之一。针对人造视网膜结构中Al2O3陶瓷与钛环的连接，既要选择合适的钎料实现连接，又要使接头满足生物兼容性的需求。目前广泛应用的是采用Ag基钎料钎焊Al2O3陶瓷与钛合金，然而Ag基钎料的钎焊界面的生物相容性较差，不能满足人造视网膜结构应用的条件，因此开发具有生物兼容性的钎料实现Al2O3陶瓷与钛环的连接是十分必要的。 At present, brazing is still one of the most effective methods for joining ceramics and metals. For the connection of Al 2 O 3 ceramics and titanium ring in the artificial retina structure, it is necessary to select the appropriate solder to realize the connection, and to make the joint meet the requirements of biocompatibility. At present, Ag-based solder is widely used to braze Al 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. Therefore, the development of It is very necessary to realize the connection of Al 2 O 3 ceramics and titanium ring with biocompatible solder.
发明内容 Contents of the invention
本发明所要解决的技术问题是为了克服现有技术的不足，提供一种工艺简单，连接可靠的人造视网膜中Al2O3陶瓷与钛环钎焊封接方法。 The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a brazing and sealing method of Al 2 O 3 ceramics and titanium ring in the artificial retina with simple process and reliable connection.
本发明解决上述技术问题所采用的技术方案是：一种人造视网膜中Al2O3陶瓷与钛环钎焊封接方法，其包括以下步骤： The technical scheme adopted by the present invention to solve the above - mentioned technical problems is: a brazing and sealing method of Al2O3 ceramics and titanium rings in an artificial retina, which includes the following steps:
（一）、制备钎料：在行星式球磨机中，将颗粒度为20~400nm、质量分数分别为6~85%和15~94%的Ti粉和Ni粉混合，在转速为100~300转/分的条件下，球磨0.5~2h，得到TiNi钎料； (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 6-85% and 15-94% respectively, at a speed of 100-300 rpm /min, ball milling for 0.5~2h to get TiNi solder;
（二）、将待焊的钛环和Al2O3陶瓷放入丙酮中超声清洗5~10min； (2) Put the titanium ring and Al 2 O 3 ceramics to be welded into acetone and ultrasonically clean them for 5-10 minutes;
（三）、将得到的TiNi钎料与丙酮混合成膏状，并将膏状钎料均匀涂覆在Al2O3陶瓷的待连接面上，再将钛环置于涂覆层上，组成待焊装配件，其中，膏状钎料涂覆层的厚度为50~100μm； (3) Mix the obtained TiNi solder with acetone to form a paste, and evenly coat the paste solder on the surface of the Al 2 O 3 ceramic to be connected, and then place the titanium ring on the coating layer to form Assemblies to be welded, wherein the thickness of the paste solder coating layer is 50-100 μm;
（四）、将步骤三中得到的待焊装配件放置在真空加热炉中，当真空度达到(1.3~2.0)×10-3Pa时，通电加热，控制升温速度为10℃/min~30℃/min，升温至990~1450℃，然后保温0~30min，再控制冷却速度为3℃/min~10℃/min，冷却至300℃，然后再随炉冷却，即实现人造视网膜中Al2O3陶瓷与钛环的连接。 (4) Place the assembly to be welded obtained in step 3 in a vacuum heating furnace. When the vacuum degree reaches (1.3~2.0)×10 -3 Pa, turn on the electric heating and control the heating rate to 10°C/min~30 ℃/min, heat up to 990~1450℃, then keep warm for 0~30min, then control the cooling rate to 3℃/min~10℃/min, cool down to 300℃, and then cool with the furnace, that is, to achieve Al 2 in the artificial retina Connection of O3 ceramics to titanium rings.
进一步，所述TiNi钎料中Ti粉和Ni粉的质量分数分别为72%和28%。 Further, the mass fractions of Ti powder and Ni powder in the TiNi solder are 72% and 28% respectively.
进一步，所述步骤（三）中膏状钎料涂覆层的厚度为80μm。 Further, in the step (3), the thickness of the paste solder coating layer is 80 μm.
进一步，所述步骤（四）中控制升温速度为20℃/min，升温至1360℃，保温为20min，冷却速度为5℃/min。 Further, in the step (4), the heating rate is controlled to be 20°C/min, the temperature is raised to 1360°C, the heat preservation is 20 minutes, and the cooling rate is 5°C/min.
本发明采用TiNi钎料连接钛环和Al2O3陶瓷，通过控制钎焊温度(990~1450℃)和保温时间(0~30min)，以控制接头组织和性能，钎料中的Ti通过与Al2O3陶瓷发生界面反应，形成化合物，实现钛环和Al2O3陶瓷的冶金连接。对照现有技术，本发明的有益效果是：成功实现了钛环和Al2O3陶瓷的生物兼容性连接，并获得了可靠的接头，其特别适用于人造视网膜结构中的钛环与Al2O3陶瓷的连接。在植入医学领域具有较大的应用前景。 The present invention uses TiNi solder to connect titanium rings and Al 2 O 3 ceramics, and controls the brazing temperature (990-1450°C) and holding time (0-30min) to control the structure and performance of the joint. Al 2 O 3 ceramics react at the interface to form compounds to realize the metallurgical connection between titanium ring and Al 2 O 3 ceramics. Compared with the prior art, the beneficial effect of the present invention is that the biocompatible connection between the titanium ring and the Al 2 O 3 ceramics is successfully realized, and a reliable joint is obtained, which is especially suitable for the titanium ring and Al 2 in the artificial retina structure O 3 ceramic connection. It has a great application prospect in the field of implant medicine.
具体实施方式 detailed description
本发明技术方案不局限于以下所列举的具体实施方式，还包括各具体实施方式之间的任意组合。 The technical solution of the present invention is not limited to the specific embodiments listed below, but also includes any combination of the specific embodiments.
实施例1：一种人造视网膜中Al2O3陶瓷与钛环钎焊封接方法，其包括以下步骤： Embodiment 1 : A method for brazing and sealing Al2O3 ceramics and titanium rings in an artificial retina, which includes the following steps:
（一）、制备钎料：在行星式球磨机中，将颗粒度为20~400nm、质量分数分别为6%和94%的Ti粉和Ni粉混合，在转速为100~300转/分的条件下，球磨0.5~2h，得到TiNi钎料； (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;
（二）、将待焊的钛环和Al2O3陶瓷放入丙酮中超声清洗5min； (2) Put the titanium ring and Al 2 O 3 ceramics to be welded into acetone and ultrasonically clean them for 5 minutes;
（三）、将得到的TiNi钎料与丙酮混合成膏状，并将膏状钎料均匀涂覆在Al2O3陶瓷的待连接面上，再将钛环置于涂覆层上，组成待焊装配件，其中，膏状钎料涂覆层的厚度为50μm； (3) Mix the obtained TiNi solder with acetone to form a paste, and evenly coat the paste solder on the surface of the Al 2 O 3 ceramic to be connected, and then place the titanium ring on the coating layer to form Assemblies to be welded, wherein the thickness of the paste solder coating is 50 μm;
（四）、将步骤三中得到的待焊装配件放置在真空加热炉中，当真空度达到(1.3~2.0)×10-3Pa时，通电加热，控制升温速度为10℃/min，升温至990℃，然后保温0~30min，再控制冷却速度为3℃/min，冷却至300℃，然后再随炉冷却，即实现人造视网膜中Al2O3陶瓷与钛环的连接。 (4) Place the assembly to be welded obtained in step 3 in a vacuum heating furnace. When the vacuum degree reaches (1.3~2.0)×10 -3 Pa, turn on the electric heating and control the heating rate to 10°C/min. to 990°C, then keep it warm for 0-30min, then control the cooling rate to 3°C/min, cool down to 300°C, and then cool with the furnace to realize the connection of Al 2 O 3 ceramics and titanium ring in the artificial retina.
采用本实施方式获得的接头完整致密，无裂纹等缺陷，实现了钛环和Al2O3陶瓷的可靠连接。且满足人造视网膜结构的气密性要求。 The joint obtained by adopting this embodiment is complete and dense, without defects such as cracks, and realizes reliable connection between the titanium ring and the Al 2 O 3 ceramic. And meet the airtightness requirements of the artificial retina structure.
实施例2：一种人造视网膜中Al2O3陶瓷与钛环钎焊封接方法，其包括以下步骤： Embodiment 2 : A method for brazing and sealing Al2O3 ceramics and titanium rings in an artificial retina, which includes the following steps:
（一）、制备钎料：在行星式球磨机中，将颗粒度为20~400nm、质量分数分别为85%和15%的Ti粉和Ni粉混合，在转速为100~300转/分的条件下，球磨0.5~2h，得到TiNi钎料； (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;
（二）、将待焊的钛环和Al2O3陶瓷放入丙酮中超声清洗10min； (2) Put the titanium ring and Al 2 O 3 ceramics to be welded into acetone and ultrasonically clean them for 10 minutes;
（三）、将得到的TiNi钎料与丙酮混合成膏状，并将膏状钎料均匀涂覆在Al2O3陶瓷的待连接面上，再将钛环置于涂覆层上，组成待焊装配件，其中，膏状钎料涂覆层的厚度为100μm； (3) Mix the obtained TiNi solder with acetone to form a paste, and evenly coat the paste solder on the surface of the Al 2 O 3 ceramic to be connected, and then place the titanium ring on the coating layer to form Assemblies to be welded, wherein the thickness of the paste solder coating is 100 μm;
（四）、将步骤三中得到的待焊装配件放置在真空加热炉中，当真空度达到(1.3~2.0)×10-3Pa时，通电加热，控制升温速度为30℃/min，升温至1450℃，然后保温30min，再控制冷却速度为10℃/min，冷却至300℃，然后再随炉冷却，即实现人造视网膜中Al2O3陶瓷与钛环的连接。 (4) Place the assembly to be welded obtained in step 3 in a vacuum heating furnace. When the vacuum degree reaches (1.3~2.0)×10 -3 Pa, turn on the electric heating and control the heating rate to 30°C/min. to 1450°C, then keep it warm for 30 minutes, then control the cooling rate to 10°C/min, cool down to 300°C, and then cool with the furnace to realize the connection of Al 2 O 3 ceramics and titanium ring in the artificial retina.
采用本实施方式获得的接头完整致密，无裂纹等缺陷，实现了钛环和Al2O3陶瓷的可靠连接。且满足人造视网膜结构的气密性要求。 The joint obtained by adopting this embodiment is complete and dense, without defects such as cracks, and realizes reliable connection between the titanium ring and the Al 2 O 3 ceramic. And meet the airtightness requirements of the artificial retina structure.
实施例3：一种人造视网膜中Al2O3陶瓷与钛环钎焊封接方法，其包括以下步骤： Embodiment 3 : A method for brazing and sealing Al2O3 ceramics and titanium rings in an artificial retina, which includes the following steps:
（一）、制备钎料：在行星式球磨机中，将颗粒度为20~400nm、质量分数分别为72%和28%的Ti粉和Ni粉混合，在转速为100~300转/分的条件下，球磨0.5~2h，得到TiNi钎料； (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;
（二）、将待焊的钛环和Al2O3陶瓷放入丙酮中超声清洗8min； (2) Put the titanium ring and Al 2 O 3 ceramics to be welded into acetone and ultrasonically clean them for 8 minutes;
（三）、将TiNi钎料用丙酮混合成膏状，并将膏状钎料均匀涂覆在Al2O3陶瓷的待连接面上，再将钛环置于涂覆层上，组成待焊装配件，其中，膏状钎料涂覆层的厚度为80μm； (3) Mix the TiNi solder with acetone to form a paste, and evenly coat the paste solder on the surface of the Al 2 O 3 ceramic to be connected, and then place the titanium ring on the coating layer to form a solder joint. Assemblies, wherein the thickness of the solder paste coating is 80 μm;
（四）、将步骤三中得到的待焊装配件放置在真空加热炉中，当真空度达到(1.3~2.0)×10-3Pa时，通电加热，控制升温速度为20℃/min，升温至990℃，然后保温15min，再控制冷却速度为5℃/min，冷却至300℃，然后再随炉冷却，即实现Al2O3陶瓷与钛环的连接。 (4) Place the assembly to be welded obtained in step 3 in a vacuum heating furnace. When the vacuum degree reaches (1.3~2.0)×10 -3 Pa, turn on the electric heating and control the heating rate to 20°C/min. to 990°C, then keep it warm for 15 minutes, then control the cooling rate to 5°C/min, cool to 300°C, and then cool with the furnace to realize the connection between Al 2 O 3 ceramics and titanium ring.
采用本实施方式获得的接头完整致密，无裂纹等缺陷，实现了钛环和Al2O3陶瓷的可靠连接。且满足人造视网膜结构的气密性要求。 The joint obtained by adopting this embodiment is complete and dense, without defects such as cracks, and realizes reliable connection between the titanium ring and the Al 2 O 3 ceramic. And meet the airtightness requirements of the artificial retina structure.
实施例4：一种人造视网膜中Al2O3陶瓷与钛环钎焊封接方法，其包括以下步骤： Embodiment 4 : A method for brazing and sealing Al2O3 ceramics and titanium rings in an artificial retina, which includes the following steps:
（一）、制备钎料：在行星式球磨机中，将颗粒度为20~400nm、质量分数分别为44%和56%的Ti粉和Ni粉混合，在转速为100~300转/分的条件下，球磨0.5~2h，得到TiNi钎料； (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 44% and 56% respectively, at a speed of 100-300 rpm. Next, ball mill for 0.5~2h to get TiNi solder;
（二）、将待焊的钛环和Al2O3陶瓷放入丙酮中超声清洗8min； (2) Put the titanium ring and Al 2 O 3 ceramics to be welded into acetone and ultrasonically clean them for 8 minutes;
（三）、将TiNi钎料用丙酮混合成膏状，并将膏状钎料均匀涂覆在Al2O3陶瓷的待连接面上，再将钛环置于涂覆层上，组成待焊装配件，其中，膏状钎料涂覆层的厚度为80μm； (3) Mix the TiNi solder with acetone to form a paste, and evenly coat the paste solder on the surface of the Al 2 O 3 ceramic to be connected, and then place the titanium ring on the coating layer to form a solder joint. Assemblies, wherein the thickness of the solder paste coating is 80 μm;
（四）、将步骤三中得到的待焊装配件放置在真空加热炉中，当真空度达到(1.3~2.0)×10-3Pa时，通电加热，控制升温速度为20℃/min，升温至1360℃，然后保温20min，再控制冷却速度为5℃/min，冷却至300℃，然后再随炉冷却，即实现Al2O3陶瓷与钛环的连接。 (4) Place the assembly to be welded obtained in step 3 in a vacuum heating furnace. When the vacuum degree reaches (1.3~2.0)×10 -3 Pa, turn on the electric heating and control the heating rate to 20°C/min. to 1360°C, then keep it warm for 20 minutes, then control the cooling rate to 5°C/min, cool to 300°C, and then cool with the furnace to realize the connection of Al 2 O 3 ceramics and titanium ring.
采用本实施方式获得的接头完整致密，无裂纹等缺陷，实现了钛环和Al2O3陶瓷的可靠连接。且满足人造视网膜结构的气密性要求。 The joint obtained by adopting this embodiment is complete and dense, without defects such as cracks, and realizes reliable connection between the titanium ring and the Al 2 O 3 ceramic. And meet the airtightness requirements of the artificial retina structure.
实施例5：一种人造视网膜中Al2O3陶瓷与钛环钎焊封接方法，其包括以下步骤： Embodiment 5 : A method for brazing and sealing Al2O3 ceramics and titanium rings in an artificial retina, which includes the following steps:
（一）、制备钎料：在行星式球磨机中，将颗粒度为20~400nm、质量分数分别为22%和78%的Ti粉和Ni粉混合，在转速为100~300转/分的条件下，球磨0.5~2h，得到TiNi钎料； (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 22% and 78% respectively, at a speed of 100-300 rpm. Next, ball mill for 0.5~2h to get TiNi solder;
（二）、将待焊的钛环和Al2O3陶瓷放入丙酮中超声清洗8min； (2) Put the titanium ring and Al 2 O 3 ceramics to be welded into acetone and ultrasonically clean them for 8 minutes;
（三）、将TiNi钎料用丙酮混合成膏状，并将膏状钎料均匀涂覆在Al2O3陶瓷的待连接面上，再将钛环置于涂覆层上，组成待焊装配件，其中，膏状钎料涂覆层的厚度为80μm； (3) Mix the TiNi solder with acetone to form a paste, and evenly coat the paste solder on the surface of the Al 2 O 3 ceramic to be connected, and then place the titanium ring on the coating layer to form a solder joint. Assemblies, wherein the thickness of the solder paste coating is 80 μm;
（四）、将步骤三中得到的待焊装配件放置在真空加热炉中，当真空度达到(1.3~2.0)×10-3Pa时，通电加热，控制升温速度为20℃/min，升温至1430℃，然后保温10min，再控制冷却速度为5℃/min，冷却至300℃，然后再随炉冷却，即实现Al2O3陶瓷与钛环的连接。 (4) Place the assembly to be welded obtained in step 3 in a vacuum heating furnace. When the vacuum degree reaches (1.3~2.0)×10 -3 Pa, turn on the electric heating and control the heating rate to 20°C/min. to 1430°C, then keep it warm for 10 minutes, then control the cooling rate to 5°C/min, cool to 300°C, and then cool with the furnace to realize the connection of Al 2 O 3 ceramics and titanium ring.
采用本实施方式获得的接头完整致密，无裂纹等缺陷，实现了钛环和Al2O3陶瓷的可靠连接。且满足人造视网膜结构的气密性要求。 The joint obtained by adopting this embodiment is complete and dense, without defects such as cracks, and realizes reliable connection between the titanium ring and the Al 2 O 3 ceramic. And meet the airtightness requirements of the artificial retina structure.
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