Ag-CuO钎料空气反应钎焊AlN陶瓷接头组织及性能

doi:10.3901/JME.2020.06.095

机械工程学报 ›› 2020, Vol. 56 ›› Issue (6): 95-101.doi: 10.3901/JME.2020.06.095

• 轻质金属与非金属的连接 • 上一篇下一篇

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Ag-CuO钎料空气反应钎焊AlN陶瓷接头组织及性能

罗云¹, 胡胜鹏^1,2, 李子寒², 许志泉², 张雷³, 宋晓国^1,2, 张丽霞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. 哈尔滨工业大学(威海)山东省特种焊接技术重点实验室威海 264209;
3. 郑州机械研究所有限公司新型钎焊材料与技术国家重点实验室郑州 450001

收稿日期:2019-10-11 修回日期:2019-12-25 出版日期:2020-03-20 发布日期:2020-05-12
作者简介:罗云,男,1995年出生,博士研究生。主要从事先进异种材料连接机理与优化研究。E-mail:19b909133@stu.hit.edu.cn;
宋晓国(通信作者),男,1983年出生,博士,教授,博士研究生导师。主要从事先进异种材料的扩散焊、钎焊、激光、搅拌摩擦焊接等方面的基础和应用研究。E-mail:xgsong@hitwh.edu.cn
基金资助:
国家自然科学基金资助项目（51905125，51775138，U1737205）。

Microstructure and Properties of AlN Ceramic Reactive Air Brazing Joints Using Ag-CuO Brazes

LUO Yun¹, HU Shengpeng^1,2, LI Zihan², XU Zhiquan², ZHANG Lei³, SONG Xiaoguo^1,2, ZHANG Lixia¹

1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001;
2. Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology(Weihai), Weihai 264209;
3. State Key Laboratory of Advanced Brazing Filler Metals and Technology, Zhengzhou Research Institute of Mechanical Engineering Co., Ltd., Zhengzhou 450001

Received:2019-10-11 Revised:2019-12-25 Online:2020-03-20 Published:2020-05-12

摘要/Abstract

摘要： 采用Ag-CuO钎料实现了AlN陶瓷与自身的空气反应钎焊。研究了CuO含量、钎焊温度和预氧化温度对界面组织及力学性能的影响规律，分析了连接机理。当钎料成分为Ag-6 mol% CuO，在1000℃/5 min的钎焊参数下，AlN/Ag-CuO/AlN接头可获得最高的抗剪切强度为13.9 MPa。采用SEM、EDS及XRD对其接头界面显微组织、断口形貌及成分进行了分析。典型接头界面组织结构为AlN/CuAl₂O₄/CuO/AlN+Ag+CuO/CuO/CuAl₂O₄/AlN。然而，在该条件下无法获得无缺陷的接头。为了降低残余热应力获得无缺陷的接头，对AlN陶瓷采用预氧化处理，在AlN陶瓷表面形成一层Al₂O₃层。当预氧化参数为1 000℃/5 h时，AlN陶瓷表面的Al₂O₃层厚度约为10 μm。采用成分为Ag-6 mol% CuO的钎料，在1 000℃/5min的钎焊参数下，对预氧化后的AlN陶瓷进行连接，获得了无缺陷的接头，接头典型界面显微组织为AlN/Al₂O₃/CuAl₂O₄/CuO/Ag+Al₂O₃/CuO/CuAl₂O₄/Al₂O₃/AlN。接头的抗剪切强度最高为22.6 MPa，与未氧化的AlN陶瓷接头相比提升了62.6%。接头进行抗剪切测试时，断面主要出现在AlN陶瓷母材。

关键词: AlN陶瓷, 空气反应钎焊, 预氧化, 界面显微组织, 抗剪切强度, Ag-CuO钎料

Abstract: Reactive air brazing of AlN ceramics is achieved using Ag-CuO brazes. The effects of CuO content, brazing temperature and pre-oxidation temperature on interface microstructure and mechanical properties are studied. The joining mechanism is analyzed. When the composition of brazes is Ag-6 mol% CuO, the highest shear strength about 13.9 MPa of the AlN/Ag-CuO/AlN joints is obtained under the brazing parameters of 1 000 ℃/5 min. The interface microstructure, fracture morphology and composition of the joints are analyzed by SEM, EDS and XRD. The typical joint interface microstructure is AlN/CuAl₂O₄/CuO/AlN+Ag+CuO/CuO/CuAl₂O₄/ AlN. However, a defect-free joint can not be obtained under this condition. In order to reduce the residual thermal stress and obtain a defect-free joint, a pre-oxidation treatment is applied to the AlN ceramic to form an Al₂O₃ layer on the surface of the AlN ceramic. When the pre-oxidation parameter is 1 000 ℃/5 h, the thickness of the Al₂O₃ layer on the surface of the AlN ceramic is about 10 μm. The pre-oxidized AlN ceramics are joined at a brazing temperature of 1 000 ℃/5 min using a brazing filler metal of Ag-6 mol%CuO to obtain a defect-free joint. The typical interfacial microstructure of the joint is AlN/Al₂O₃/CuAl₂O₄/CuO/Ag+Al₂O₃/CuO/CuAl₂O₄/ Al₂O₃/AlN. The joint has a shear strength of up to 22.6 MPa and an increase of 62.5% compared to the unoxidized AlN ceramic joint. When the joints are subjected to shear resistance test, the fracture sections mainly are observed in the AlN ceramic.

Key words: aluminum nitride ceramic, reactive air brazing, pre-oxidation, interfacial microstructure, shear strength, Ag-CuO brazes

中图分类号:

TG156

罗云, 胡胜鹏, 李子寒, 许志泉, 张雷, 宋晓国, 张丽霞. Ag-CuO钎料空气反应钎焊AlN陶瓷接头组织及性能[J]. 机械工程学报, 2020, 56(6): 95-101.

LUO Yun, HU Shengpeng, LI Zihan, XU Zhiquan, ZHANG Lei, SONG Xiaoguo, ZHANG Lixia. Microstructure and Properties of AlN Ceramic Reactive Air Brazing Joints Using Ag-CuO Brazes[J]. Journal of Mechanical Engineering, 2020, 56(6): 95-101.

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Ag-CuO钎料空气反应钎焊AlN陶瓷接头组织及性能

Microstructure and Properties of AlN Ceramic Reactive Air Brazing Joints Using Ag-CuO Brazes

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