Ag-Cu钎料与双相陶瓷透氧膜的润湿和界面反应研究  

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

作　　者：张莉莉[1] 李可[1] 于称称 张玉文[1] 吴成章[1] 丁伟中[1] 

机构地区：[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

出　　处：《无机材料学报》2016年第6期607-612,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金(51174133;51274139);国家杰出青年科学基金(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。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.

关 键 词：AG-CU合金 CGO-NBCO双相透氧膜 润湿 界面反应 

分 类 号：TQ174[化学工程—陶瓷工业]