• Synthesis, microstructure and mechanical properties of ceria stabilized tetragonal zirconia prepared by spray drying technique

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    • Keywords


      Zirconia; ceria stabilized zirconia; nanocrystalline; spray drying; toughened ceramics; mechanical properties.

    • Abstract


      Ceria stabilized zirconia powders with ceria concentration varying from 6 to 16 mol% were synthesized using spray drying technique. Powders were characterized for their particle size distribution and specific surface area. The dense sintered ceramics fabricated using these powders were characterized for their microstructure, crystallite size and phase composition. The flexural strength, fracture toughness and microhardness of sintered ceramics were measured. High fracture toughness and flexural strength were obtained for sintered bodies with 12 mol% of CeO2. Flexural strength and fracture toughness were dependent on CeO2 concentration, crystallite size and phase composition of sintered bodies. Correlation of data has indicated that the transformable tetragonal phase is the key factor in controlling the fracture toughness and strength of ceramics. It has been demonstrated that the synthesis method is effective to prepare nanocrystalline tetragonal ceria stabilized zirconia powders with improved mechanical properties. Ce–ZrO2 with 20 wt% alumina was also prepared with flexural strength, 1200 MPa and fracture toughness, 9.2 MPa √m.

    • Author Affiliations


      S C Sharma1 N M Gokhale1 Rajiv Dayal1 Ramji Lal1

      1. Naval Materials Research Laboratory, Shil Badlapur Road, P.O. Anand Nagar, Ambernath (East), Thane 421 506, India
    • Dates

  • Bulletin of Materials Science | News

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      Posted on July 25, 2019

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