无机材料学报 ›› 2016, Vol. 31 ›› Issue (6): 607-612.DOI: 10.15541/jim20150551

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Ag-Cu钎料与双相陶瓷透氧膜的润湿和界面反应研究

张莉莉, 李 可, 于称称, 张玉文, 吴成章, 丁伟中   

  1. (上海大学 省部共建高品质特殊钢冶金与制备国家重点实验室, 上海 200072)
  • 收稿日期:2015-11-09 修回日期:2015-12-23 出版日期:2016-06-20 网络出版日期:2016-05-19
  • 作者简介:张莉莉(1991–), 女, 硕士研究生. E-mail: springzlli@163.com
  • 基金资助:
    国家自然科学基金(51174133, 51274139);国家杰出青年科学基金(51225401)

Wetting Properties and Interface Reaction Mechanism of Ag-Cu Brazes on Dual-phase Membrane Ceramic

ZHANG Li-Li, LI Ke,YU Chen-Chen, ZHANG Yu-Wen, WU Cheng-Zhang, DING Wei-Zhong   

  1. (State Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai 200072, China)
  • Received:2015-11-09 Revised:2015-12-23 Published:2016-06-20 Online:2016-05-19
  • About author:ZHANG Li-Li. E-mail: springzlli@163.com
  • Supported by:
    National Natural Science Foundation of China (51174133, 51274139);National Science Fund for Distinguished Young Scholars (51225401)

摘要:

用座滴法测试Ag-Cu合金钎料对Ce0.8Gd0.2O2-δ-NdBaCo2O5+δ(CGO-NBCO)双相透氧膜的润湿性, 利用SEM-EDS分析润湿和界面反应机理。结果表明: 空气条件下Ag-Cu合金与CGO-NBCO间的润湿遵从界面反应润湿机制。随着Cu含量的增加, Ag-Cu合金对透氧膜润湿性能提高, Cu含量为6.6mol%~15.8mol%时, 润湿角在35°~20°左右。在润湿界面处出现Cu氧化物的富集, 并且在透氧膜侧生成一层由Cu氧化物和CGO-NBCO双相透氧膜反应产生的Ba-Cu-O、Co-Cu-O和Nd-Ce-Cu-O等复杂氧化物相构成的产物层, 新的界面反应层的生成有利于Ag基合金钎料的润湿, 改善了钎料的润湿性能。

关键词: Ag-Cu合金, CGO-NBCO双相透氧膜, 润湿, 界面反应

Abstract:

A reactive air brazing Ag-CuO alloy was evaluated for brazing dual phase oxygen membrane Ce0.8Gd0.2O2-δ- NdBaCo2O5+δ (CGO-NBCO). Contact angle tests were observed between Ag-Cu brazes and CGO-NBCO in air and the interfacial microstructures of the used samples were evaluated by SEM. The results indicate that the wetting angle decreases from 35° to 20° with the content of Cu increased from 6.6mol% to 15.8mol%. It is found that there are copper oxide-enriched zones formed in the junction of the alloy and substrate. The wettability between Ag-CuO alloy and oxygen membrane CGO-NBCO is improved due to the interfacial reaction between Cu oxides in braze and the surface layers of CGO-NBCO substrates to form compounds of Ba-Cu-O, Co-Cu-O and Nd-Ce-Cu-O oxides. The new formed interface reaction layers promote the wettability of the rest braze.

Key words: Ag-Cu alloy brazing filler, dual-phase membranes ceramic, wettability, interface reaction

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