Ni-Ti钎料钎焊ZrO2陶瓷的界面组织及接头的力学性能  

Interfacial Microstructure and Mechanical Property of ZrO Joints Brazed with Ni-Ti Filler Metal

作　　者：张琦 王娟 郑开宏 杨红旺[1] ZHANG Qi;WANG Juan;ZHENG Kaihong;YANG Hongwang(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China;Guangdong Institute of Materials and Processing,Guangdong Academy of Science,Guangzhou 510650,China;Guangdong Key Laboratory for Technology and Application of Metal Toughening,Guangzhou 510650,China;Guangzhou Key Laboratory of Advanced Structural Metal Materials,Guangzhou 510650,China)

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110870 [2]广东省科学院广东省材料与加工研究所,广州510650 [3]广东省金属强韧化技术与应用重点实验室,广州510650 [4]广州市先进金属结构材料重点实验室,广州510650

出　　处：《硅酸盐学报》2020年第9期1424-1430,共7页Journal of The Chinese Ceramic Society

基　　金：广东省科学院建设国内一流研究机构行动专项(2019GDASYL-0501014);广州市科技计划项目(201906040007);广东省重点研发项目(2019B010942001);广东特支计划项目(2017TQ04C645)。

摘　　要：采用Ni-Ti钎料实现ZrO2陶瓷自身的钎焊连接,研究接头组织结构以及钎焊保温时间对界面组织和力学性能的影响。结果表明:在1 350℃保温10 min的钎焊条件下,陶瓷与钎料界面处生成TiO+Ni2Ti4O反应层,TiO紧靠陶瓷呈非连续层状分布,Ni2Ti4O呈连续层状分布,焊缝中心区域由NiTi和Ni3Ti构成。随着保温时间的延长,反应层中TiO逐渐减少直至消失,Ni2Ti4O层的厚度逐渐增大;当保温时间为40 min时,Ni2Ti4O层中出现明显的裂纹。接头剪切强度随着保温时间的延长呈先增大后减小的趋势,当保温时间为30 min时,接头剪切强度达到最大值88.7 MPa。ZrO2 ceramics were brazed with Ni-Ti filler metal. The microstructure of the joint and the effect of holding time on the interfacial microstructure and mechanical property were investigated. The results show that Ti O+Ni2Ti4O layer is formed at the interface of ceramic and filler metal at 1 350 ℃ for 10 min. TiO distributes as a discontinuous layer next to the ceramic, while Ni2Ti4O is a continuous layer. The center of brazing seam consists of NiTi and Ni3Ti. TiO decreases and finally disappears, the thickness of Ni2Ti4O layer increases with the increase of holding time. Some cracks appear in Ni2Ti4O layer when the holding time is 40 min. The shear strength of the joints firstly increases and then decreases with increasing holding time. The shear strength of the joint reaches the maximum value of 88.7 MPa when the holding time is 30 min.

关 键 词：镍钛钎料 氧化锆陶瓷 钎焊 界面组织 剪切强度 

分 类 号：TG454[金属学及工艺—焊接]