Improving Contour Accuracy and Strength of Reactive Air Brazed (RAB) Ceramic/Metal Joints by Controlling Interface Microstructure
Improving Contour Accuracy and Strength of Reactive Air Brazed (RAB) Ceramic/Metal Joints by Controlling Interface Microstructure
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DOI：
10.1002/adem.201100274
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发表时间：
2012-06
影响因子：
3.6
通讯作者：
Chichi Li;B. Kuhn;J. Brandenberg;T. Beck;L. Singheiser;K. Bobzin;N. Bagcivan;N. Kopp
中科院分区：
文献类型：
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作者：
Chichi Li;B. Kuhn;J. Brandenberg;T. Beck;L. Singheiser;K. Bobzin;N. Bagcivan;N. Kopp
固体氧化物燃料电池、氧、氢分离器和气体重整器等高温电化学器件的发展对金属/陶瓷接头的钎焊技术提出了巨大的挑战。为了保持此类设备的完整性，所产生的密封必须在连续和循环高温操作期间保持稳定和密封。作为一种连接金属和陶瓷材料的解决方案，反应空气钎焊近年来受到越来越多的关注。本文比较了纯银、AgCu和AgAl三种钎料钎焊接头的轮廓精度、室温抗分层性能以及钎焊接头和断裂钎焊接头的显微组织。讨论的重点是断裂机制和相关的抗分层能力。AgAl钎焊接头具有良好的力学性能和轮廓精度。
The development of high‐temperature electrochemical devices such as solid oxide fuel cells, oxygen, and hydrogen separators and gas reformers poses a great challenge in brazing technology of metal/ceramic joints. To maintain the integrity of such equipment, the resulting seals have to be stable and hermetic during continuous and cyclic high temperature operation. As a solution for joining metal and ceramic materials, reactive air brazing has gained increasing interest in recent years. This paper compares joints brazed by different filler alloys: pure Ag, AgCu, and AgAl in three different aspects: contour accuracy, room temperature delamination resistance, and corresponding microstructures of the as‐brazed and fractured brazed joints. Discussion focuses on fracture mechanism and associated delamination resistance. AgAl brazed joints exhibit the most promising mechanical properties and contour accuracy.