In Situ Synthesis of 3Y-TZP/MgAl2O4 Nanoparticle Composite Through Co-precipitation

Abstract

3 Mole pct yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) and spinel (MgAl2O4) nanocomposite was synthesized by co-precipitation—calcination method. The powders were made to a composition of 70 vol pct 3Y-TZP and 30 vol pct MgAl2O4. The composite made of 70 pct 3Y-TZP and 30 pct MgAl2O4 is well known for its superplastic ability at high temperatures. Reverse drop method was utilized to precipitate metal ions simultaneously, resulting in a homogenous composition on a molecular scale and crystalline after calcination at 1273 K (1000 °C) for 2 hours. The characterization results showed that the powders were phase pure tetragonal zirconia and spinel, fairly not forming a ternary complex between Spinel and 3Y-TZP. From the TEM and DLS analyses, the average particle size was determined to be about 50 to 100 nm with some level of agglomeration. Raman peaks E g (156 cm−1), E g (274 cm−1), B 1g (332 cm−1), E g (474 cm−1), A 1g (605 cm−1), and B 1g (653 cm−1), due to the tetragonal phase of 3Y-TZP and E g (487 cm−1) due to cubic phase of MgAl2O4, are observed in the sample. HRTEM results show interplanar spacing of (311) of the spinel and (101) of the yttria-stabilized zirconia, which indicates the high-level homogeneity in the nanoparticle composite powders.