Abstract
The ZrO 2 ceramic/stainless steel joints were fabricated by pressureless brazing using Ag-Cu brazing solder with TiH 2 powder. Microstructure and microchemistry of ceramic/filler interface and brazing interlayer on the joint cross section were characterize and analyzed by means of scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). Joint strength was tested by shear-loading method. The effects of brazing conditions on the joint strength were investigated. The results show that three main zones are formed in the brazing interlayer. A thin reaction layer and a Ti-rich sublayer are produced at the ceramic/filler interface. In the experimental condition ranges, the joint strength increases firstly and then falls, and the influence of brazing temperature on joint strength is more remarkable than that of holding time. The maximal shear strength is about 90MPa, and the average is over 75MPa with the optimized technologic condition. Most of the joints fracture in the ceramic matrix adjacent to the joint, only several in the reaction layer. The lower the temperature or the shorter the holding time is, the greater the possibility which joints fractured in reaction layer is. Diffusion, enrichment and interreaction of diversified elements, act the key role in the formation of the brazing interlayer, and finally affect the joint mechanical properties.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
