AgCu28-B2O3钎料空气反应钎焊连接Al2O3陶瓷工艺及机理研究

doi:10.3901/JME.2023.10.048

机械工程学报 ›› 2023, Vol. 59 ›› Issue (10): 48-55.doi: 10.3901/JME.2023.10.048

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AgCu28-B₂O₃钎料空气反应钎焊连接Al₂O₃陶瓷工艺及机理研究

李昕悦¹, 李健^1,2, 张健康³, 林盼盼¹, 林铁松¹, 何鹏¹

1. 哈尔滨工业大学先进焊接与连接国家重点实验室哈尔滨 150001;
2. 陆军装甲兵学院士官学校长春 130117;
3. 贵研铂业股份有限公司昆明 650000

收稿日期:2022-06-23 修回日期:2022-10-28 出版日期:2023-05-20 发布日期:2023-07-19
通讯作者: 林盼盼(通信作者),女,1987年出生,博士,副教授,博士研究生导师。主要研究方向为新材料及异种材料连接。E-mail:pplin@hit.edu.cn E-mail:pplin@hit.edu.cn
作者简介:李昕悦,女,1998年出生,博士研究生。主要研究方向为新材料及异种材料连接。E-mail:lxy13604066725@163.com
基金资助:
国家磁约束核聚变能发展研究专项(2019YFE03100100)、国家自然科学基金(51974101，51975150，U21A20128，52175302)、黑龙江省自然科学基金(JQ2020E003)、云南省重大科技专项(202002AB080001-1)和中国-乌克兰材料连接与先进制造“一带一路”联合实验室建设与联合研究(2020YFE0205304)资助项目。

Research on the Process and Mechanism of Reactive Air Brazing of Al₂O₃Ceramics with AgCu28-B₂O₃ Filler

LI Xinyue¹, LI Jian^1,2, ZHANG Jiankang³, LIN Panpan¹, LIN Tiesong¹, HE Peng¹

1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001;
2. Naughty Officer School, Army Armored Force Academy, Changchun 130117;
3. Sino-Platinum Metals Co., Ltd., Kunming 650000

Received:2022-06-23 Revised:2022-10-28 Online:2023-05-20 Published:2023-07-19

摘要/Abstract

摘要： 为了以低成本获得性能良好的Al₂O₃陶瓷连接接头,开发AgCu28-20B₂O₃钎料,将其应用于空气反应钎焊连接Al₂O₃陶瓷。B₂O₃可以有效改善AgCu28钎料对Al₂O₃陶瓷表面的润湿性。钎焊过程中Cu粉被氧化成CuO,并进一步与Al₂O₃、B₂O₃发生反应,生成Cu₂Al₆B₄O₁₇晶须,进而获得性能优异的可靠接头。当保温时间为60 min,连接温度高于950℃时,可以实现Al₂O₃陶瓷接头的有效连接,钎缝中心区主要为Ag,靠近界面处为CuO与Cu₃B₂O₆的混合相及棒状Cu₂Al₆B₄O₁₇晶须,接头抗剪强度随温度升高而升高。当连接温度高于1 100℃后,晶须在高温下分解成无定型颗粒状产物,接头抗剪强度下降。最佳工艺参数为T=1 050℃,t=60 min,接头的抗剪强度达到了70.9 MPa,断裂发生在焊缝中靠近Al₂O₃母材处。开发一种用于Al₂O₃连接的复合钎料,并在接头中合成了新型硼酸铜铝晶须,提高了接头的性能。

关键词: Al₂O₃陶瓷, AgCu28-B₂O₃钎料, 空气反应钎焊, Cu₂Al₆B₄O₁₇晶须, 工艺参数, 反应机理

Abstract: In order to obtain Al₂O₃ ceramic joint with good performance at low cost, AgCu28-20B₂O₃ fillerr is developed and applied to air reaction brazing Al₂O₃ ceramics. B₂O₃ can improve the wettability of AgCu28 filler on Al₂O₃ ceramic surface effectively. In the brazing process, Cu powder is oxidized to CuO and further reacted with Al₂O₃ and B₂O₃ to form Cu₂Al₆B₄O₁₇ whiskers. Thus, the reliable joint with excellent performance is obtained. When the holding time is 60 min and the brazing temperature is higher than 950℃, an effective Al₂O₃ ceramic joint can be realized. The center area of the brazing joint is mainly Ag, while the interface is composed of CuO and Cu₃B₂O₆ mixed phases and the rod-like Cu₂Al₆B₄O₁₇ whiskers. The shear strength of the joint increases with the increase of the brazing temperature. When the brazing temperature is higher than 1 100℃, the whiskers decompose into amorphous granular products at high temperature and then the joint shear strength decreases. Holding at 1 050℃ for 60 min is the optimum process parameter. The joint shear strength can reach 70.9 MPa and the fracture occurred in the weld near the Al₂O₃ ceramic base material. A composite filler for Al₂O₃ connection is developed, and a new type of whiskers is synthesized in the joint to improve the joint performance.

Key words: Al₂O₃ ceramics, AgCu28-B₂O₃ filler, reactive air brazing, Cu₂Al₆B₄O₁₇ whiskers, process parameters, reaction mechanism

中图分类号:

TG425

李昕悦, 李健, 张健康, 林盼盼, 林铁松, 何鹏. AgCu28-B₂O₃钎料空气反应钎焊连接Al₂O₃陶瓷工艺及机理研究[J]. 机械工程学报, 2023, 59(10): 48-55.

LI Xinyue, LI Jian, ZHANG Jiankang, LIN Panpan, LIN Tiesong, HE Peng. Research on the Process and Mechanism of Reactive Air Brazing of Al₂O₃Ceramics with AgCu28-B₂O₃ Filler[J]. Journal of Mechanical Engineering, 2023, 59(10): 48-55.

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AgCu28-B₂O₃钎料空气反应钎焊连接Al₂O₃陶瓷工艺及机理研究

Research on the Process and Mechanism of Reactive Air Brazing of Al₂O₃Ceramics with AgCu28-B₂O₃ Filler

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