Further it is shown that the mean chord length and the Jeffries size, i.e. It is shown that the ceramics prepared usually have total porosities in the range 78-84 % and that the porosities made up by large pores (volume fraction of foam bubbles) are usually in the range 58-75 %. The stereological analysis showed similarity between the starting particles of Ti powder and particles of titanium in the composite matrix.Ībstract: In this work we demonstrate the application of stereology-based image analysis for the characterization of highly porous cellular ceramics (alumina foams) prepared by biological foaming with yeast and subsequent drying (80-105 ☌) and firing (1570 ☌). Moreover, the x-ray diffraction exposed the existence of tetragonal zirconium oxide and titanium or a new phase from Ti-Zr-O system. The EDS analysis revealed partial solution of titanium in ZrO 2 matrix. The SEM observation and EDS analysis of the cross-section of the samples confirmed that the Ti particles are distributed homogenously in analysed areas. Stereological analysis by using computer programs was supported. The microstructural characterization was carried out using the x-ray diffraction and the scanning electron microscope (SEM) with EDS analysis. The selected physical properties of the green body and sintered ZrO 2-Ti composites were determined by Archimedes method. Sintering process was conducted in an argon atmosphere at 1300☌ with retention time 2h.
A composite material was formed by uniaxial pressing. % Ti powder with particle size about 15 μm was prepared.
In this study a composite from the nanosize ZrO 2 powder stabilized by 3 mol% Y 2O 3 and 3 vol.
Abstract: The morphology ZrO 2-Ti composites depends on used powders substrates, methods of forming and sintering conditions.
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