Effect of the powder consolidation method type on the microstructure and selected properties of Al2O3-Cu-Ni composites
Justyna Zygmuntowicz , Marcin Wachowski , Paulina Piotrkiewicz , Waldemar Kaszuwara
AbstractThe present research is focused on the characterization of the composites from Al2O3-Cu-Ni system. Two methods of ceramic-metal composite forming were applied: uniaxial powder pressing and Pulse Plasma Sintering (PPS). To obtain the samples the powder mixtures containing 85 vol.% of Al2O3 and 15 vol.% of metal powders were used. Influence of the sintering process on microstructure and mechanical properties of the two series of the composites was analyzed in detail. The selected physical properties of samples were characterized by Archimedes immersion method. Vickers hardness and the fracture toughness of the composites was determined as well. The microstructure of the composites was characterized by XRD, SEM, EDX. Fractography investigation was carried out as well. Independently on composite production method Al2O3, Cu, Ni, and CuNi phases were revealed. Fractography investigation results revealed different character of fracture in dependence of fabrication method. Pulse Plasma Sintered samples were characterized by higher crack resistance and higher Vickers hardness in comparison to the specimens manufactured by uniaxial pressing.
|Journal series||Archives of Metallurgy and Materials, ISSN 1733-3490, e-ISSN 2300-1909|
|Publication size in sheets||0.5|
|Keywords in English||Composites, Pulse Plasma Sintering, Uniaxial Powder Pressing, Scanning Electron Microscopy|
|Score||= 40.0, 22-06-2020, ArticleFromJournal|
|Publication indicators||= 0; = 0; : 2018 = 0.534; : 2018 = 0.697 (2) - 2018=0.72 (5)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.