title: Synthesis, mechanical properties and bioactivity of nanostructured zirconia.
abstract: Yttria stabilized zirconia 3Y - TZP nanopowders (10-30 nm) are prepared through direct precursor calcination of mixed zirconium oxychloride and yttrium nitrate solutions at 600°C for 2h. Cuboid(50×25×20 mm(3)) zirconia blanks are fabricated through centrifuge casting and followed by sintering at 1350°C for 2h. Sintered zirconia blanks exhibit 24% volume shrinkage and 98% relative density with average grain size of 250 nm. Vickers hardness and indented fracture toughness of sintered blanks are measured as 13.5 GPa and 3.5 MPa.m(1/2), respectively. Bioactivity of nanostructured zirconia originates after four weeks incubation in simulated body fluid solution. An optimum time is required for the deposition of hydroxyapatite nanoparticles on stress-induced nucleation site of nanostructured zirconia.
authors.affiliation: Department of Ceramic Engineering, National Institute of Technology, Rourkela, Orissa, India. dsarkar@nitrkl.ac.in
authors.forename: Debasish
authors.initials: D
authors.lastname: Sarkar
authors.forename: Sanjaya Kumar
authors.initials: SK
authors.lastname: Swain
authors.forename: Sangeeta
authors.initials: S
authors.lastname: Adhikari
authors.forename: B Sambi
authors.initials: BS
authors.lastname: Reddy
authors.forename: Himadri Sekhar
authors.initials: HS
authors.lastname: Maiti
mesh_terms: D001672:Biocompatible Materials / Q000138:chemical synthesis* / Q000737:chemistry; D017886:Durapatite / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D013696:Temperature; D015019:Yttrium / Q000737:chemistry; D015040:Zirconium / Q000737:chemistry*
chemical_list: D001672:Biocompatible Materials; D015019:Yttrium; D017886:Durapatite; D015040:Zirconium; C028541:zirconium oxide; C026090:zirconium oxychloride; C091417:yttria