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The effects of composition and sintering conditions on Zirconia Toughened Alumina (ZTA) nanocomposites

Esfahani, H ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.4028/www.scientific.net/AMR.93-94.695
  3. Publisher: 2010
  4. Abstract:
  5. Zirconia Toughened Alumina (ZTA) Nanocomposites were prepared using Nano sized Zirconia (ZrO2) powders doped with 3% mol of yttria (Y 2O3) nanopowders. Diffusion of α-alumina (Al 2O3) nanoparticles as well as yttria into the Zirconia lattice network drives monoclinic - tetragonal martensitic transformation. Zirconia toughened alumina (ZTA) composites containing different amount of partially stabilized Zirconia (PSZ) 5, 10, 15 and 20% mol, were prepared via wet mixing and axial pressing. After sintering at different temperatures,1450, 1550 and 1650 °C, phase change in the samples were monitored. X-ray diffraction patterns showed that at constant composition, tetragonal zirconia was increased by temperature increasing due to intensification of diffuse coefficient of alumina and yttria in the system. At constant temperature, remained monoclinic zirconia was increased with Zirconia content increasing
  6. Keywords:
  7. Monoclinic ; Tetragonal ; Zirconia Toughened Alumina(ZTA) ; Constant composition ; Constant temperature ; Monoclinic zirconia ; Nano powders ; Nano-sized ; Network drives ; Partially stabilized zirconia ; Phase Change ; Sintering condition ; Tetragonal zirconia ; Diffraction ; Holographic interferometry ; Martensite ; Martensitic transformations ; Nanocomposites ; Sintered alumina ; Sintering ; X ray diffraction ; X ray diffraction analysis ; Yttrium alloys ; Zirconia
  8. Source: Advanced Materials Research, 7 December 2009 through 9 December 2009 ; Volume 93-94 , December , 2010 , Pages 695-698 ; 10226680 (ISSN) ; 9780878492855 (ISBN)
  9. URL: https://www.scientific.net/AMR.93-94.695