摘要
利用座滴法润湿实验和连接强度测试对Ag-3.3%(摩尔分数)Cu空气钎焊BaCo0.7Fe0.2Nb0.1O3-δ(BCFNO)混合导体透氧膜陶瓷进行研究。结果表明,此钎料能够很好的润湿BCFNO透氧膜陶瓷,且随着温度的升高润湿角逐渐减小,钎焊界面的连接强度升高。当钎焊温度控制在偏晶反应温度以上一定范围内时,富CuO的液相对BCFNO起到了预润湿作用并形成1层反应层,有利于界面连接强度的提高。这时的界面连接强度可以达到透氧膜陶瓷抗弯强度的65%,断裂主要发生在钎料与陶瓷基界面间的反应层内。
The sessile drop wetting experiment and joint strength test was conducted to study the Ag-3.3mol% Cu air brazing BaCo0.7Fe0.2Nb0.1O3-δ（BCFNO） mixed-conducting membranes for oxygen.The results indicate that the filler has good wetting property to the substrate;with the temperature increasing the wetting angle decreases and the joining strength increases.Controlling the brazing temperature over the monotectic reaction temperature within a certain range,the CuO-rich liquid reacting with BCFNO playing the role of pre-wetting and forming a reaction layer is beneficial to the improvement of the interface joining strength.Then the interface joining strength of joints can reach 65% of ceramic membranes substrate,fracture occurs mainly in the interface layer between the ceramic substrate and the filler metal.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2011年第2期313-317,共5页
Journal of Functional Materials
基金
国家高科技研究发展计划(863计划)资助项目(2006AA11A189)
国家科技支撑计划资助项目(2006BA103A05)
上海市科学技术委员会重点资助项目(07DZ12036)
