Fabrication and characterization of ZrO2/Ni composites
Justyna Zygmuntowicz , Paweł Falkowski , Aleksandra Miazga , Katarzyna Konopka
AbstractThis paper focuses on a research on the influence of nickel content in zirconia matrix and its impact on the mechanical properties of obtained composites. ZrO2/Ni mixed powders were uniaxially pressed and sintered in a nitrogen atmosphere to obtain ZrO2/Ni composites that were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and energy-dispersive Xray spectroscopy (EDS). The stereological analysis allows obtaining information about the size distribution of zirconia grains in the sintered composites. Relative density, hardness, fracture toughness, and bending strength were also analyzed. The results revealed that the presence of Ni particles in the composites affects the mechanical properties of the materials. An increased Ni concentration caused a decrease in Vickers hardness and increased the fracture toughness of the ZrO2/Ni composites compared to the ZrO2 samples. This kind of composite is of interest for temperature and flow sensors, thermal barrier coatings for gas turbines and supersonic propulsion systems of spacecrafts, as well as a material for anode in solid oxide fuel cell.
|Journal series||Journal of the Australian Ceramic Society, ISSN 2510-1560, e-ISSN 2510-1579, (A 25 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||Pressing, Composites, Mechanical properties, ZrO2, Nickel|
|Score|| = 25.0, 18-05-2018, ArticleFromJournal|
= 25.0, 18-05-2018, ArticleFromJournal
|Publication indicators||: 2016 = 0.744 (2) - 2016=0.864 (5)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.