Determination of the compressive yield strength for nano-grained YAG transparent ceramic by XRD analysis

An Improving Densification in Spark Plasma Sintering Ultrafine-grained Y2O3 Transparent Ceramic by Particle Fracture and Rearrangement

“…There may be new mechanisms in the sintering process. In the process of preparing transparent ceramics by high-pressure sintering, the nano-particles will yield under high temperature and high-pressure conditions, which will cause the microscopic residual stress and strain of the bulk piece to decrease [26,27]. The experimental results showed that the yttrium oxide nanorods were fractured and rearranged under the conditions of 5 GPa/500 °C [16].…”

“…We consider that the fracture of nanorods will also cause the microscopic residual stress from the uncoordinated deformation of particles during consolidation. As microscopic deviatoric strain will lead to the X-ray line broadening in addition to reduced grain size [26,28], we calculate the residual strain through the XRD data after the whole spectrum tting. According to the well-reputed Williamson-Hall model [28,29] and its corresponding variations, the residual micro-strain (ε) of the specimen can be de ned as:…”

Quantitative description of yttrium aluminate ceramic composition by means of Er+3 microluminescence spectrum

“…This spectroscopy can be performed by an instantaneous measurement, and also simultaneously with other processes, for example, during annealing [16,17]. Furthermore, taking into account recently advances in photonic structures and the emergence of nanograined ceramics, it has become necessary to determine, within microscopic regions, the different phases that compose the solid and their spatial distribution [18,19]. The luminescence emission spectrum is a valid option for this particular target.…”