CN105541368A - Brazing method for Al2O3 ceramic and titanium ring adopting AuPd brazing filler metal - Google Patents
Brazing method for Al2O3 ceramic and titanium ring adopting AuPd brazing filler metal Download PDFInfo
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 239000000919 ceramic Substances 0.000 title claims abstract description 55
- 238000005219 brazing Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000000945 filler Substances 0.000 title claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title abstract description 4
- 229910052593 corundum Inorganic materials 0.000 title abstract description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 title abstract description 4
- 229910052751 metal Inorganic materials 0.000 title description 5
- 239000002184 metal Substances 0.000 title description 5
- 229910000679 solder Inorganic materials 0.000 claims abstract description 55
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 50
- 239000000843 powder Substances 0.000 claims abstract description 20
- 238000005485 electric heating Methods 0.000 claims abstract description 8
- 238000000498 ball milling Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 14
- 239000011247 coating layer Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 2
- 210000001525 retina Anatomy 0.000 abstract description 11
- 238000004140 cleaning 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
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 210000001328 optic nerve Anatomy 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B37/00—Joining burned ceramic articles with other burned ceramic articles or other articles by heating
- C04B37/02—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles
- C04B37/023—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles characterised by the interlayer used
- C04B37/026—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles characterised by the interlayer used consisting of metals or metal salts
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3013—Au as the principal constituent
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/02—Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
- C04B2237/12—Metallic interlayers
- C04B2237/125—Metallic interlayers based on noble metals, e.g. silver
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Ceramic Products (AREA)
- Materials For Medical Uses (AREA)
- Prostheses (AREA)
Abstract
本发明涉及一种采用AuPd钎料对Al2O3陶瓷与钛环的钎焊方法，包括以下步骤：球磨由Au粉和Pd粉组成的钎料，清洗母材，将钎料制成膏状并装配成Al2O3陶瓷/AuPd钎料/钛环的待焊结构，启动真空泵达到真空度要求后通电加热并保温，然后随炉冷却至室温，完成AuPd钎料对Al2O3陶瓷与钛环的钎焊连接。钎焊后所得的Al2O3陶瓷/AuPd钎料/钛环接头组织致密，且生物兼容性较好。特别适合于人造视网膜结构中Al2O3陶瓷/钛环的连接。 The invention relates to a method for brazing Al2O3 ceramics and titanium rings using AuPd solder, comprising the following steps: ball milling the solder composed of Au powder and Pd powder, cleaning the base material, and making the solder into a paste And assembled into Al 2 O 3 ceramics/AuPd solder/titanium ring to be welded structure, start the vacuum pump to reach the vacuum degree requirements, then turn on the electric heating and keep warm, and then cool to room temperature with the furnace, complete the AuPd solder on Al 2 O 3 ceramics and Brazed connection of titanium rings. The Al 2 O 3 ceramic/AuPd solder/titanium ring joint obtained after brazing has a dense structure and good biocompatibility. Especially suitable for the connection of Al 2 O 3 ceramic/titanium rings in artificial retina structures.
Description
技术领域 technical field
本发明属于焊接技术领域，具体涉及一种采用AuPd钎料对Al2O3陶瓷与钛环的钎焊方法。 The invention belongs to the field of welding technology, and in particular relates to a brazing method for Al 2 O 3 ceramics and a titanium ring by using AuPd solder.
背景技术 Background technique
人造视网膜是利用电子器件代替失去功能的视网膜，用电流刺激仍然完好的视神经，帮助使用者重新获得基本的视觉。Al2O3陶瓷与钛环的连接结构是人造视网膜结构中的重要部件，实现Al2O3陶瓷与钛环的可靠连接对促进人造视网膜技术的迅猛发展具有重要意义。 The artificial retina uses electronic devices to replace the lost retina, and uses electric current to stimulate the still intact optic nerve to help users regain basic vision. The connection structure between Al 2 O 3 ceramics and titanium ring is an important part of the artificial retina structure, and the reliable connection between Al 2 O 3 ceramics and titanium ring is of great significance to promote the rapid development of artificial retina technology.
人造视网膜结构中的Al2O3陶瓷与钛环连接件一方面要满足一定的连接强度和气密性，另一方面整个接头要具有生物兼容性，即连接界面不可含有对人体有害的组元。真空钎焊不仅能保证Al2O3陶瓷与钛环接头具有一定的连接强度，而且不会带来外界污染，可满足人造视网膜结构的要求。因此，采用具有生物兼容性的钎料进行真空钎焊是实现Al2O3陶瓷与钛环连接十分有效的方法。 The connection between Al 2 O 3 ceramics and titanium ring in the artificial retina structure must meet certain connection strength and airtightness on the one hand, and on the other hand, the entire joint must be biocompatible, that is, the connection interface must not contain components that are harmful to the human body. Vacuum brazing can not only ensure a certain connection strength between Al 2 O 3 ceramics and titanium ring, but also will not cause external pollution, which can meet the requirements of the artificial retina structure. Therefore, vacuum brazing with biocompatible solder is a very effective method to realize the connection between Al 2 O 3 ceramics and titanium rings.
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，钎料具有良好的生物兼容性，实现钛环与Al2O3陶瓷可靠连接的采用AuPd钎料对Al2O3陶瓷与钛环的钎焊方法。 The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a simple process, the brazing filler metal has good biocompatibility, and realize the reliable connection between the titanium ring and the Al 2 O 3 ceramics using AuPd brazing filler metal for Al 2 Brazing method of O 3 ceramics and titanium rings.
本发明解决上述技术问题所采用的技术方案是：一种采用AuPd钎料对Al2O3陶瓷与钛环的钎焊方法，其特征在于：其包括以下步骤： The technical scheme adopted by the present invention to solve the above - mentioned technical problems is: a kind of brazing method that adopts AuPd solder to Al2O3 ceramics and titanium ring, it is characterized in that: it comprises 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77~99%和1~23%的Au粉和Pd粉混合，在转速为100~300转/分的条件下，球磨0.5~2h，得到AuPd钎料； (1) Preparation of solder: In a planetary ball mill, mix Au powder and Pd powder with a particle size of 20-400nm and a mass fraction of 77-99% and 1-23% respectively, at a speed of 100-300 rpm Under the condition of 0.5~2h, AuPd solder is obtained by ball milling;
（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AuPd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50~100μm； (3) Mix the obtained AuPd 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1100~1450℃，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 1100~1450℃, then keep warm for 0~30min, then control the cooling rate to 3℃/min~10℃/min, cool to 300℃, and then cool with the furnace, that is, realize Al 2 O 3 ceramics Connection with titanium ring.
进一步，所述AuPd钎料中Au粉和Pd粉的质量分数分别为88%和12%。 Further, the mass fractions of Au powder and Pd powder in the AuPd solder are 88% and 12%, 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1330℃，保温为15min，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 1330°C, the heat preservation is 15 minutes, and the cooling rate is 5°C/min.
本发明采用AuPd钎料连接钛环和Al2O3陶瓷，通过控制钎焊温度(1100~1450℃)和保温时间(0~30min)，以保证钎焊接头获得较好的微观组织和性能，成功实现了钛环和Al2O3陶瓷的连接，并获得了可靠的接头。对照现有技术，本发明的有益效果是：本发明选用AuPd钎料，能够实现钛环和Al2O3陶瓷的生物兼容性连接，获得对人体无毒无害的接头。钛环中的Ti通过与Al2O3陶瓷中的Al，O及钎缝中的Au，Pd反应，形成化合物，实现接头界面的冶金连接。特别适合于人造视网膜结构中Al2O3陶瓷/钛环的连接。 The present invention uses AuPd solder to connect titanium rings and Al 2 O 3 ceramics, and controls the brazing temperature (1100-1450°C) and holding time (0-30min) to ensure that the brazed joint obtains better microstructure and performance. The connection between the titanium ring and the Al2O3 ceramic was successfully realized and a reliable joint was obtained. Compared with the prior art, the beneficial effect of the present invention is: the present invention selects AuPd solder, can realize the biocompatible connection of the titanium ring and the Al 2 O 3 ceramics, and obtain a non-toxic and harmless joint to the human body. The Ti in the titanium ring reacts with Al, O in the Al 2 O 3 ceramics and Au, Pd in the brazing seam to form compounds and realize the metallurgical connection of the joint interface. Especially suitable for the connection of Al 2 O 3 ceramic/titanium rings in artificial retina structures.
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1：一种采用AuPd钎料对Al2O3陶瓷与钛环的钎焊方法，其包括以下步骤： Embodiment 1: a kind of adopting AuPd brazing filler metal to Al 2 O 3 ceramics and the brazing method of titanium ring, it comprises 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99%和1%的Au粉和Pd粉混合，在转速为100转/分的条件下，球磨0.5~2h，得到AuPd钎料； (1) Preparation of solder: In a planetary ball mill, mix Au powder and Pd powder with a particle size of 20-400nm and a mass fraction of 99% and 1%, respectively, at a speed of 100 rpm. Ball milling for 0.5~2h to obtain AuPd 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AuPd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50μm； (3) Mix the obtained AuPd 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1100℃，然后保温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 1100°C, then keep it warm for 30 minutes, then control the cooling rate to 3°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，满足人造视网膜结构的应用要求。 The joint obtained by adopting this embodiment is complete and dense, free from defects such as cracks, and realizes the reliable connection between the titanium ring and the Al 2 O 3 ceramics, meeting the application requirements of the artificial retina structure.
实施例2：一种采用AuPd钎料对Al2O3陶瓷与钛环的钎焊方法，其包括以下步骤： Embodiment 2: a kind of adopting AuPd filler material to Al 2 O 3 ceramics and the brazing method of titanium ring, it comprises 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77%和23%的Au粉和Pd粉混合，在转速为300转/分的条件下，球磨0.5~2h，得到AuPd钎料； (1) Preparation of solder: in a planetary ball mill, mix Au powder and Pd powder with a particle size of 20-400nm and a mass fraction of 77% and 23%, respectively, at a speed of 300 rpm. Ball milling for 0.5~2h to obtain AuPd 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AuPd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100μm； (3) Mix the obtained AuPd 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，再控制冷却速度为10℃/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 30°C/min. to 1450°C, then keep it warm, then control the cooling rate to 10°C/min, cool down to 300°C, and then cool with the furnace to realize the connection between the Al 2 O 3 ceramic and the 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，满足人造视网膜结构的应用要求。 The joint obtained by adopting this embodiment is complete and dense, free from defects such as cracks, and realizes the reliable connection between the titanium ring and the Al 2 O 3 ceramics, meeting the application requirements of the artificial retina structure.
实施例3：一种采用AuPd钎料对Al2O3陶瓷与钛环的钎焊方法，其包括以下步骤： Embodiment 3: a kind of adopting AuPd brazing filler metal to Al 2 O 3 ceramics and the brazing method of titanium ring, it comprises 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88%和12%的Au粉和Pd粉混合，在转速为100~300转/分的条件下，球磨0.5~2h，得到AuPd钎料； (1) Preparation of solder: In a planetary ball mill, mix Au powder and Pd powder with a particle size of 20-400nm and a mass fraction of 88% and 12%, respectively, at a speed of 100-300 rpm. Next, ball mill for 0.5~2h to get AuPd 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）、将得到的AuPd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 obtained AuPd 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 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1330℃，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 1330°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 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。 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.
实施例4：一种采用AuPd钎料对Al2O3陶瓷与钛环的钎焊方法，其特征在于：其包括以下步骤： Embodiment 4: a kind of brazing method that adopts AuPd solder to Al 2 O 3 ceramics and titanium ring, it is characterized in that: it comprises 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80%和20%的Au粉和Pd粉混合，在转速为100~300转/分的条件下，球磨0.5~2h，得到AuPd钎料； (1) Preparation of solder: In a planetary ball mill, mix Au powder and Pd powder with a particle size of 20-400nm and a mass fraction of 80% and 20%, respectively, at a speed of 100-300 rpm. Next, ball mill for 0.5~2h to get AuPd 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）、将得到的AuPd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 obtained AuPd 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 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1330℃，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 1330°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 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。 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.
实施例5：一种采用AuPd钎料对Al2O3陶瓷与钛环的钎焊方法，其特征在于：其包括以下步骤： Embodiment 5: a kind of brazing method that adopts AuPd solder to Al 2 O 3 ceramics and titanium ring, it is characterized in that: it comprises 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Au粉和Pd粉混合，在转速为100~300转/分的条件下，球磨0.5~2h，得到AuPd钎料； (1) Preparation of solder: In a planetary ball mill, mix Au powder and Pd 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 AuPd 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）、将得到的AuPd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60μm； (3) Mix the obtained AuPd 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 60 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15℃/min，升温至1450℃，然后保温18min，再控制冷却速度为8℃/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 15°C/min. to 1450°C, then keep it warm for 18 minutes, then control the cooling rate to 8°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，满足人造视网膜结构的应用要求。 The joint obtained by adopting this embodiment is complete and dense, free from defects such as cracks, and realizes the reliable connection between the titanium ring and the Al 2 O 3 ceramics, meeting the application requirements of the artificial retina structure.
Claims (4)
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