Structure Evolution in Al₂O₃ - ZrO₂(Y₂O₃) Ceramic Composites during Sintering

Abstract:

The paper demonstrates the possibility to control the degree of tetragonal zirconia stabilization, microstructure and physical and mechanical behavior of Al2O3 -ZrO2(Y2O3) ceramic composite. Control is exerted via the process variables during deposition synthesis of nanosized composite powders from hydroxide salts, and their subsequent heat treatment and consolidation. Morphology features of nanosized powder systems and microstructures of the consolidated nanostructured materials were characterized by BET surface are measurements, scanning electron microscopy (both standard and HR), and large-angle X-ray diffraction. Correlations are established between microstructure parameters, physical and mechanical behavior of composite ceramics and a degree of stabilization of tetragonal ZrO2.

• Periodical: Advances in Science and Technology (Volume 65)
• Pages: 11-15
• DOI: https://doi.org/10.4028/www.scientific.net/AST.65.11
• Online since: October 2010
• Authors: Ya. Dyatlova, S.S. Ordanyan, Andrey Osmakov, V. Pesin, V. Rumyantsev
• Keywords: Mechanical Performance, Microstructure, Physical Performance, Tetragonality Factor, Uniformity, Zirconia-Toughened Alumina Composite

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