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Joining of Yttria Stabilized Zirconia to Stainless Steel 420 by Nickel & Silver Nano Paste
, M.Sc. Thesis Sharif University of Technology ; Simchi, Abdolreza (Supervisor) ; Kokabi, Amir Hossein (Supervisor)
Abstract
Joining of yttria-stabilized zirconia (YSZ) to stainless steel (SS) is considered for various applications such as solid oxide fuel cells, thermal barrier coatings, and medical implants. In the present work, a series of brazing pastes utilizing silver and nickel nanoparticles (~80 nm) mixed with carboxymethyl cellulose as the organic phase were developed to join 5YSZ to 420 SS. The effects of processing parameters such as time and temperature of brazing and the composition of the paste on the microstructure of the joint and its mechanical strength were studied. The mechanism of interface formation was elaborated by scanning electron microscopy (SEM) and electron probe micro analyzer (EPMA)....