摘要
利用座滴法润湿实验,借助SEM和EDS测试,研究了Ag-CuO钎料与BaCo0.7Fe0.2Nb0.1O3-δ透氧膜陶瓷润湿及界面反应机理。结果表明Ag-Cu-O/BCFNO间的润湿遵从界面反应润湿机制,随Cu含量增加和温度升高,润湿角快速减小。当Cu含量为3.3%(摩尔分数)时,在界面处BCFNO侧开始生成1层反应层,反应层的存在降低了固液界面能,使界面润湿性得到改善,相互冶金作用增强。反应层产生的原因是界面处发生了界面反应CuOx+BaCoFeNbO→Ba-Cu-O+Co-Cu-O,生成的复杂氧化物Ba-Cu-O、Co-Cu-O在BCFNO基体的晶粒边界上呈岛状分布。
The wetting and interface reaction mechanism of Ag-Cu-O brazes on BaCo0.7Fe0.2Nb0.1O3-δ（BCFNO） oxygen-permeable membrane ceramic were investigated by the sessile drop wetting experiment and SEM/EDS test.The results indicate that the wetting of Ag-Cu-O brazes on BCFNO follow the wetting mechanism of interface reaction,with the Cu content and temperature increased,wetting angle rapid decreased.When the content of Cu was 3.3mol%,in BCFNO side at the interface a layer of reactive layer was generated.The existence of reactive layer reduced the liquid-solid interfacial energies,then improved the wettability of interface and enhanced the mutual metallurgy effect.Reactive layer are caused by the interface reaction（CuOx＋BaCoFeNbO→Ba-Cu-O ＋ Co-Cu-O） occurs in the interface.The complex oxide Ba-Cu-O,Co-Cu-O in the grain boundary of BCFNO matrix show island shape distributed.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2012年第1期77-80,共4页
Journal of Functional Materials
基金
国家高技术研究发展计划(863计划)资助项目(2006AA11A189)
上海市自然科学基金资助项目(11ZR1412900)
上海市科学技术委员会重点资助项目(07DZ12036)
