Joining mechanism of connection between Ag-plated Kovar interconnector and stranded Ag-plated Cu wire produced via parallel gap resistance welding

IF 2.2 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters: X Pub Date : 2023-09-01 DOI:10.1016/j.mlblux.2023.100209

Yuhan Ding , Bo Zhang , Chen Shen , Nannan Chen , Jusha Ma , Kanglong Wu , Yi Wei , Lin Wang , Bin Qian , Xueming Hua

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引用次数: 0

Abstract

A space solar array includes GaAs solar cell, interconnector, and stranded Cu wire. Due to the preferential high working efficiency, the assembly of solar array is mostly performed using parallel gap resistance welding (PGRW). Since strengthening of the PGRW joints is the key to further extend service life of solar array, it is necessary to elucidate joining mechanism of each connection. In the present research, to clarify the controversy over PGRW joining mechanism between Ag-plated Kovar interconnector and stranded Ag-plated Cu wire, various advanced material characterization methods are conducted to joining interfaces. Experimental results confirm that, in addition to the known Ag/Cu eutectic interface, solid evidence of metallurgy bonding is also found in Cu/Cu interface. Such finding has significant implication for further enlarge the PGRW process window and produce stronger joints.

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平行间隙电阻焊镀银Kovar互连器与镀银铜绞线的连接机理

空间太阳能电池阵列包括砷化镓太阳能电池、互连器和绞合铜线。由于具有较高的工作效率，太阳能电池阵的组装大多采用并联间隙电阻焊(PGRW)进行。PGRW接头的加固是进一步延长太阳能电池阵使用寿命的关键，因此有必要对各接头的连接机理进行研究。在本研究中，为了澄清镀银Kovar互连器与镀银铜绞线之间PGRW连接机制的争议，对连接界面进行了各种先进的材料表征方法。实验结果证实，除了已知的Ag/Cu共晶界面外，Cu/Cu界面还存在冶金键合的确凿证据。这一发现对进一步扩大PGRW工艺窗口，产生更强的接头具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Letters: X Multiple-

CiteScore

3.10

自引率

0.00%

发文量

审稿时长

114 days