Macro to Atomic Scale Characterization of 3 mol% Yttria-Stabilized Tetragonal Zirconia Polycrystalline (3Y-TZP) Ceramics for Welding Pin Applications
作者： Hasan Gocmez , Hilmi Yurdakul , Arife Yurdakul
DOI: 10.1007/S13369-021-05374-4
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摘要: This study aims to develop a zirconia-based ceramic with high mechanical properties for welding pin applications. 3 mol% yttria-stabilized tetragonal zirconia polycrystalline (3Y-TZP) nanopowders were synthesized by the hydrothermal method. According powder characteristics, obtained powders only consisted of t-ZrO2 grains surface area (107 ± 1.1 m2/g) and nano-sized individuals (7.2 ± 0.2 nm average) as well Y0.05ZrO1.5 at % chemical composition. The 3Y-TZP densified up 99.10 ± 0.1% relative density pressureless sintering 1500 °C 2 h. Crystalline phases determined 73.5 ± 1 vol.% 26.5 ± 1 m-ZrO2 in sintered body using X-ray diffraction (XRD) analysis. Vickers hardness indentation fracture toughness values measured 9.5 ± 0.4 GPa 15.17 ± 0.2 MPa·m1/2 ceramics, respectively. Scanning electron microscopy (SEM) observations showed homogeneous microstructure submicron (780 ± 5 nm) samples. Aberration-corrected scanning transmission (AbC-STEM) revealed presence phase transformation twinning giving rise ceramics. As an end-product, pins produced from hydrothermally nanopowders. They withstood 300,000.00 ± 5000.00 welded nuts performance test. makes ceramics outstanding material projection nut process.
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