Microstructure and mechanical properties of Al2O3/ZrO2 eutectic ceramic composites prepared by explosion synthesis

Microstructural evolution of supra‐nanostructure Al2O3/ZrO2 eutectic powders by combustion synthesis‐spray cooling

“…Relevant studies showed that the solid solution formed by adding oxides is favorable for the stability of t-ZrO 2 . 2,4,13,30 Thus, amounts of ZrO 2 phase reserve the tetragonal structure rather than the monoclinic structure, which is consistent with the XRD pattern.…”

“…Commercial powders Al and Zr(NO 3 ) 4 were used as reactant. The combustion synthesis reaction for preparing Al 2 O 3 /ZrO 2 eutectic powders was proposed as following Equation (1):…”

“…According to the Maxwell model, the heat conductivity coefficient of material is estimated using Equation (3). 29 The latent heat is included in ANSYS simulation by defining the enthalpy value of material, which can be calculated using Equation (4). The initial and boundary condition of the model is imposed as follows: When the time is 0, the melt temperature and the ambient temperature are set as 3000 K and is 298 K, respectively.…”

“…Al 2 O 3 -based eutectic ceramics have excellent mechanical behavior, superior antioxidation, good creep resistance and intrinsic thermal stability in an oxidizing atmosphere. [1][2][3][4][5] Therefore, they are considered to be ones of potential ultra high-temperature structural materials for the jet aircraft engine, aeronautics and aerospace. 2,3 In particular, Al 2 O 3 /ZrO 2 system is marked because of excellent creep resistance and outstanding strength at elevated temperatures even up to nearly the melting temperature.…”

Microstructure Evolution and Model Analysis of Al2O3/ZrO2 Hypoeutectic Ceramic During Rapid Solidification

“…These excellent properties make Al 2 O 3 -ZrO 2 eutectic ceramics potential for a wide range of applications. Generally, eutectic ceramics were mostly prepared by Bridgman method 3 , laser heated floating zone method 4,5 , micro pulling down method 6,7 , combustion synthesis method 8,9 , thermal explosion spraying [10][11][12] and so on. In addition, the mechanical properties of the Al 2 O 3 -ZrO 2 eutectic ceramics are mainly decided by microstructure which is influenced significantly by the cooling rate of the melt.…”