Research work covering the characterization of ceramic powder materials: corundum, zirconia, silicon carbide, boron carbide and ceria, as well as the characterization of sintered materials obtained on the basis of these raw materials, in particular corundum-based composites ZTA, silicon nitride and silicon carbide

… divided into three stages. 2. Detailed description of the subject of the contract. 2.1. STAGE I: Characteristics of ceramic powders and obtained sinters. 1. Characteristics of ceramic powders or mixtures thereof. The scope of research includes: • determination of phase composition by X-ray diffraction (XRD) – 10 powders; • Zeta potential measurement – 10 powders; • determination of the specific surface of powders by the multipoint adsorption isotherm BET – in the amount of 10 powders; • characteristics of powder morphology by scanning electron microscopy (SEM) – 10 powders. 2. Characteristics of the sinter obtained. The scope of research includes: • determination of phase composition by X-ray diffraction (XRD) in the amount of 40 measurements; • determination of sinter microstructure by scanning electron microscopy (SEM), including stereographic characteristics, in the amount of 40 measurements; • determination of resistance to brittle cracking by the SENB method or by making a Vickers pyramid imprint and measuring the length of cracks in the amount of 40 different types of materials; • determination of mechanical flexural strength – 40 different materials; • determination of Young's module as a function of temperature – 4 measurements; • hardness determination – 40 different materials; • determination of resistance to heat shock – 4 different materials. 3. The elaboration of the results together with the report should include an analysis and description of the relationship between the phase composition, microstructure and mechanical and thermomechanical properties of the tested ceramic materials. In the case of silicon carbide-based materials, the study should additionally include the determination of the relationship between technological conditions, formulation composition, phase composition and microstructure, and the properties of the obtained sinters. 2.2. STAGE II: Characteristics of corundum fittings manufactured on a technical scale. The scope of research includes: • determination of phase composition by X-ray diffraction (XRD) – 6 measurements; • the determination of the sinter microstructure by scanning electron microscopy (SEM), together with the stereological characteristics, in the amount of 6 measurements; • determination of resistance to brittle cracking by the SENB method or by making a Vickers pyramid imprint and measuring the length of cracks in the amount of 6 different materials; • determination of mechanical flexural strength – in the amount of 6 different materials; • marking of Young's module – in the amount of 6 materials; • determination of hardness – in the amount of 6 different materials. 2.3. Stage III. The characteristics of SiC, ZTA and Si₃N₄ fittings manufactured on a technical scale Stage III covers the characteristics of silicon carbide (SiC), ZTA (Zirconia Toughened Alumina) and silicon nitride (Si₃N₄) fittings manufactured on a technical scale. The scope of research includes: • determination of phase composition by X-ray diffraction (XRD) – 20 measurements; • determination of sinter microstructure by scanning electron microscopy (SEM), including stereographic characteristics, in the amount of 20 materials; • Defined