Microstructure and mechanical properties of Al2O3/Er3Al5O12 eutectic rods grown by the laser-heated floating zone method

Directionally solidified fabrication in planar geometry of Al_2O_3-Er_3Al_5O_12 eutectic composite for thermophotovoltaic devices

“…It was found that layer thickness was correlated to the processing rate, increasing at around 210 ± 5 µm in samples solidified at 180 mm/h. The microstructure consisted of a homogeneous 3D interpenetrated network of both eutectic phases, also referred to as Chinese Script microstructure, in agreement with previous studies reported in cylindrical geometry [16].…”

“…Recorded values for samples processed at 180 and 720 mm/h departing from EP2 were 17.6 ± 1.1 GPa and 17.7 ± 5.2 GPa respectively for hardness, and 264.9 ± 10.3 GPa and 293.1 ± 37.3 GPa respectively for Young modulus. These values were in the same range than for the obtained in cylindrical geometry [16], and close to the measured in directionally solidified Al 2 O 3 -Y 3 Al 5 O 12 eutectics [20,21]. …”

Microstructural stability at elevated temperatures of directionally solidified Al2O3/Er3Al5O12 eutectic ceramics

“…Both phases were slightly elongated along the growth direction. The use of pulling rates higher than 750 mm/h led to microstructures in which both chinese script and fibrous pattern were present [10]. Due to this in homogeneity the microstructure stability study was uniquely performed in samples grown up to 750 mm/h.…”

Fabrication and microstructural stability of spark plasma sintered Al2O3/Er3Al5O12 eutectic

“…For Al 2 O 3, the lamellae widths measure between 0.2 μm and 0.5 μm. The volume fractions of the phases obtained using area analysis from SEM images are [35,36]. On the surface of the melts, a coarser primary EAG formation was detected.…”