Effect mechanism of Ni-P coating on the structure and properties of Cu/Al joints

被引：0

作者：

Huang J. ^{[1
]}

Long W. ^{[1
]}

Zhong S. ^{[1
]}

Geng J. ^{[2
]}

Ding T. ^{[1
]}

Qin J. ^{[1
]}

机构：

[1] State Key Laboratory of Advanced Brazing Filler Metals and Technology, Zhengzhou Research Institute of Mechanical Engineering Co., Ltd., Zhengzhou

[2] State Grid Henan Electric Power Research Institute, Zhengzhou

来源：

Hanjie Xuebao/Transactions of the China Welding Institution | 2021年 / 42卷 / 05期

关键词：

Cu/Al joint; Interface structure; Ni-P coating; Strength; Toughness;

D O I：

10.12073/j.hjxb.20201127001

中图分类号：

学科分类号：

摘要：

To investigate the influence of Ni-P coating on the interfacial reaction of Cu/Al dissimilar metal brazing, two brazing filler metals, Zn98Al and BAl67CuSi, were first used to braze 3003 aluminum alloy and T2 copper with or without Ni-P coating. Four different brazing joints were obtained. The Cu side interfacial microstructure, joint shear strength, joint fracture morphology, joint microhardness and joint bending morphology were systematically studied. Additionally, the joints without Ni-P coating were also used for comparison. The results showed that the interfacial structure of the Cu/Zn98Al/Al brazed joint was Cu/diffusion layer+8.8 μm thickness Cu3.2Zn4.2Al0.7. After the preparation of the Ni-P coating on the T2 copper surface, the interfacial structure transformed into Ni-P coating+1.5 μm thickness Al3Ni, which leaded to the higher strength and toughness. However, the interfacial structure of the Cu/BAl67CuSi/Al brazed joint changed from diffusion layer+15 μm thickness CuAl2 to Ni-P coating+1.8 μm thickness Cu3NiAl6, which leaded to the higher toughness but the lower strength. The effect mechanism of Ni-P coating on the interfacial reaction of Cu/Al joint was clarified. The mechanical properties test results were consistent with the microstructure transition of the Cu side interface of the joint. Finally, the interfacial reaction model of the Cu/Al joint was established, and the influence mechanism of Ni-P coating on the interfacial structure and mechanical properties of the Cu/Al joint was illustrated. Copyright © 2021 Transactions of the China Welding Institution. All rights reserved.

引用

页码：51 / 56and70

页数：5619

共 12 条

[1] Sun Shineng, Li Duanyang, Liu Dongyan, Et al., Effects of Bi and Ce addition on tensile properties and corrosion resistance of Zn-15Al alloys by continuous casting and extrusion, Materials Letters, 275, pp. 1-4, (2020)
[2] Ye Zheng, Yang Hao, Huang Jihua, Et al., A novel Zn-Al-Si corrosion resistant filler metal for Cu/Al brazing, Materials Letters, 206, pp. 201-204, (2017)
[3] Yu Hua, Zhang Liangliang, Cai Fangfang, Et al., Interface microstructure and growth mechanism of brazing Cu/Al joint with BAl88Si filler metal, Vacuum, 181, pp. 1-8, (2020)
[4] Niu Zhiwei, Ye Zheng, Huang Jihua, Et al., Interfacial structure and properties of Cu/Al joints brazed with Zn-Al filler metals, Materials Characterization, 138, pp. 78-88, (2018)
[5] Ma Xiaotian, Yan Dejun, Meng Xiangchen, Et al., Progress on the control of intermetallic compounds in aluminum/steel friction stir welding, Transactions of the China Welding Institution, 41, 7, pp. 2-11, (2020)
[6] Li Huan, Xu Guangpei, Zhang Yuhui, Et al., Correlation between microstructure and properties of 2219/5A06 dissimilar aluminum alloy welded joint, Transactions of the China Welding Institution, 41, 9, pp. 8-15, (2020)
[7] Ming Zhu, Wang Kehong, Liu Zeng, Et al., Effect of the cooling rate on the microstructure and mechanicalproperties of high nitrogen stainless steel weld metals, China Welding, 29, 2, pp. 48-52, (2020)
[8] Zhang Luyao, Wu Xiaojuan, Sun Huanhuan, Et al., Effect of nickel plating on copper-aluminum intermetallic compounds, Journal of Shenyang Ligong University, 38, 1, pp. 16-19, (2019)
[9] Li Liu, Han Zhang, Hao Zheng, Et al., Influence of crystalline structure on diffusion barrier property of electroless Ni-Fe-P coatings in Zn-Al solder interconnects, Journal of Alloys and Compounds, 804, 10, pp. 42-48, (2019)
[10] Najib A Muhammad Najib A Muhammad, Wu C S, Tian Weihong, Effect of ultrasonic vibration on the intermetallic compound layer formation in Al/Cu friction stir weld joints, Journal of Alloys and Compounds, 785, pp. 512-522, (2019)

← 1 2 →