摘要
以Al-Zn-Mg-Cu合金为封装材料,采用粉末冶金技术对Al_2O_3陶瓷和304不锈钢进行了封接试验,研究了烧结合金组织、接头特征点成分和物相,并探讨了烧结温度和保温时间对接头界面组织和连接强度的影响。结果表明,在烧结温度570℃,保温时间1 h条件下获得主要由α-Al和MgZn_2组成的较为致密的铝合金,304不锈钢/铝合金侧剪切强度为24 MPa、Al_2O_3陶瓷/铝合金侧剪切强度为6.4 MPa。在304不锈钢/铝合金界面处,Fe、Al元素均发生扩散,形成了不同金属间化合物的扩散层。铝合金/Al_2O_3陶瓷界面处Mg与Al_2O_3反应生成了MgAl_2O_4相,改善了铝合金和Al_2O_3陶瓷的润湿性。
Al2O3 ceramic and 304 stainless-steel were encapsulated with the lab-made filler of Al-Zn-Mg-Cu powder.The influence of the sintering temperature and time on the phases and shear-strength of the encapsulated seam was investigated with X-ray diffraction,energy dispersive spectroscopy,scanning electron microscopy.The results show that the sintering temperature and time had a major impact.For example,the shear-strengths decreased with an increase of sintering temperature,and changed in an increase-decrease mode with an increase of sintering time,as both the sintering temperature and time increased,the shear-strengths increased up to 11.4 MPa.Sintered at 570℃ for 1 h,fairly compact Al-Zn-Mg-Cu alloy formed,comprising α-Al,MgZn2,Fe-Al and MgAl2O4phases;and the shear-strengths on the stainless-steel and Al2O3 sides were 24 MPa and 6.4 MPa,respectively.Formation of MgAl2O4possibly accounted for the improved wettability of Al-alloy and Al2O3 ceramic.
作者
孙彪
张德库
王克鸿
杨谦
Sun Biao;Zhang Deku;Wang Kehong;Yang Qian(Nanjing University of Science and Technology,School of Materials Science and Engineering,Nanjing 210094,China)
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2019年第2期174-178,共5页
Chinese Journal of Vacuum Science and Technology
基金
国防科技创新特区资助项目(17-H863-03-ZD-007-004-03)
