固体氧化物燃料电池用Ti_(3)SiC_(2)/SUS430复合双极板材料直接扩散焊接连接性能  

Direct Diffusion Welding Performance of Ti_(3)SiC_(2)/SUS430 Composite Bipolar Plate Material for Solid Oxide Fuel Cell

作　　者：韦守李 徐斌[4] 时婧 孙明月[4] 程强 赵经香 常修亮 戴作强[1,2,3] 李希超 郑莉莉 WEI Shouli;XU Bin;SHI Jing;SUN Mingyue;CHENG Qiang;ZHAO Jingxiang;CHANG Xiuliang;Dai Zuoqiang;LI Xichao;ZHENG Lili(College of Mechanical and Electrical Engineering,Qingdao University,Qingdao 266071,China;Power Integration and Energy Storage System Engineering Technology Center,Qingdao University,Qingdao 266071,China;National and Local Joint Engineering Technology Center for Intelligent Power Integration Technology of Electric Vehicles,Qingdao 266071,China;Key Laboratory of nuclear materials and safety evaluation,Institute of Metals,Chinese Academy of Sciences,Shenyang 110016,China;School of materials and engineering,Ocean University of China,Qingdao 266404,China)

机构地区：[1]青岛大学机电工程学院,山东青岛266071 [2]青岛大学动力集成及储能系统工程技术中心,山东青岛266071 [3]电动汽车智能化动力集成技术国家地方联合工程技术中心,山东青岛266071 [4]中国科学院金属研究所中国科学院核用材料与安全评价重点实验室,辽宁沈阳110016 [5]中国海洋大学材料与工程学院,山东青岛266404

出　　处：《材料科学与工程学报》2025年第1期62-67,共6页Journal of Materials Science and Engineering

基　　金：国家自然科学基金青年基金项目(52001179);山东省自然科学基金项目(ZR2020ME019)。

摘　　要：本研究提出将一种Ti_(3)SiC_(2)/SUS430复合双极板材料的金属放置于阳极一侧,陶瓷放置于阴极一侧,从而避免“阴极毒化”现象。研究利用Gleeble 3500热模拟试验机在850~1150℃下对SUS430和Ti_(3)SiC_(2)进行直接扩散焊接,通过观察接头界面的微观形貌,研究了焊接温度对接头结构和组织的影响。研究结果表明,当焊接温度低于950℃时,基体元素并未发现明显的互扩散,难以获得可靠接头;当焊接温度为1050℃时,SUS430与Ti_(3)SiC_(2)陶瓷界面之间已经实现了紧密贴合,呈现出不连续的锯齿状;当焊接温度高于1150℃时,Si挥发向SUS430基体扩散,使得Ti_(3)SiC_(2)产生拓扑分解,同时Fe、Cr向Ti_(3)SiC_(2)基体扩散,界面处产生了反应层,两种材料基本实现了有效连接。由于两种材料的热膨胀性能不匹配,会出现焊接裂缝,可考虑添加中间层进行扩散焊接,以获得结合更紧密的复合双极板材料。A Ti_(3)SiC_(2)/SUS430 composite bipolar plate material is placed on the anode side,and a ceramic is placed on the cathode side,which can eliminate the phenomenon of“cathodic poisoning”.The direct diffusion welding of SUS430 and Ti_(3)SiC_(2)was carried out at 850-1150℃using Gleeble 3500 thermal simulation testing machine.The influences of welding temperature on the joint structure and microstructure were studied by analyzing the microscopy of the joint interface.The results show that when the welding temperature is lower than 950℃,there is no obvious mutual diffusion of the matrix elements.Therefore,it is difficult to obtain a reliable joint.When the welding temperature is 1050℃,the interface between SUS430 and Ti_(3)SiC_(2)ceramics has achieved a well bonding,presenting a discontinuous serrated morphology.When the welding temperature is above 1150℃,diffuses to the SUS430 matrix,which causes the topological decomposition of Ti_(3)SiC_(2).At the same time,Fe and Cr diffuse to the Ti_(3)SiC_(2)matrix,and a reaction layer is formed at the interface,indicating that the two materials have basically achieved effective welding.However,welding cracks are formed due to the mismatch of the thermal expansion of the two materials.A middle layer can be added during diffusion welding to obtain a compact bipolar plate material.

关 键 词：固体氧化物燃料电池 Ti_(3)SiC_(2) SUS430 扩散焊接 界面反应 

分 类 号：TQ174[化学工程—陶瓷工业]