Effect of Nb2O5 content and sintering temperature on the microstructure and bending strength of porous Ni-YSZ cermets
Source abstract
Abstract
Abstract Porous Ni-YSZ cermets are prepared by reducing NiO-YSZ composites upon exposure to (Ar+6% H 2 ) gas. The porous cermets are prepared by the addition of carbon black (0.123 mol) to mixed NiO-YSZ powders and the conversion of NiO to Ni in the NiO-YSZ composites. The microstructure and bending strength of porous Ni-YSZ cermets as functions of sintering temperature and Nb 2 O 5 content are discussed. The Ni-YSZ cermets consist of uniformly distributed Ni and YSZ grains as well as pores. Both higher sintering temperature and higher Nb 2 O 5 content yield lower porosity, thus increasing the bending strength. The bending strength of 0.00470 mol% Nb 2 O 5 –containing Ni-YSZ cermets sintered at 1400 °C (111 MPa) is about two times higher than that of Nb 2 O 5 –free Ni-YSZ cermets sintered at 1400 °C (59 MPa).
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Research context
OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Advanced materials and composites · Electronic and Structural Properties of Oxides
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