Nanometric solid solutions of the fluorite and perovskite type crystal structures: Synthesis and properties

In this paper a short review of our results on the synthesis of nanosized CeO2, CaMnO3 and BaCeO3 solid solutions are presented. The nanopowders were prepared by two innovative methods: self propagating room temperature synthesis (SPRT) and modified glycine/nitrate procedure (MGNP). Different types of solid solutions with rare earth dopants in concentrations ranging from 0–0.25 mol% were synthesized. The reactions forming solid solutions were studied. In addition, the characteristics of prepared nanopowders, phenomena during sintering and the properties of sintered samples are discussed

Thermodynamic assessment of the PZT system

The thermodynamic assessment of the PZT system is carried out by the CALPHAD method. The thermodynamic properties of the phases are described using compound energy formalism (CEF) for the various solid phases and a solution model for the liquid. Three boundary systems PbO-ZrO2, PbO-TiO2 and ZrO2-TiO2 are reassessed based on the most recent experimental data, while the ternary PbO-TiO2-ZrO2 System is modelled for the first time. Calculated phase diagrams are compared with the experimental data

Thermodynamic assessment of the PZT system

The thermodynamic assessment of the PZT system is carried out by the CALPHAD method. The thermodynamic properties of the phases are described using compound energy formalism (CEF) for the various solid phases and a solution model for the liquid. Three boundary systems PbO-ZrO2, PbO-TiO2 and ZrO2-TiO2 are reassessed based on the most recent experimental data, while the ternary PbO-TiO2-ZrO2 System is modelled for the first time. Calculated phase diagrams are compared with the experimental data

Study of the solid-liquid equilibria in the Ga-In-As-Sb system at 973 and 1073K

The present research interprets various binary, ternary and quaternary interactions using a generalised liquid solution model for the Ga–In–As–Sb alloys at 973 and 1073 K. The excess free energy equations for the liquid and solid solutions are used in conjunction with the solid–liquid equilibrium data in order to express equilibrium properties including the evaluation of the quaternary interactions in the alloys. The use of the derived values of the equation enables one to interpret the phase equilibria and thermodynamic properties of the system

Residual Stresses and Stress Intensity Factors for Vickers Indentation Cracks in Glass Derived from COD Measurements

Vickers indentation cracks are an appropriate tool to determine the crack-tip toughness KI0 of brittle materials as ceramics from the total crack opening displacements. In addition, the residual stresses occurring in the surrounding of an indentation can be evaluated. The fracture mechanics procedure is described in detail and applied to indentation cracks in glass