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Digitale Medien

Diffusion limited crystallization and phase partitioning in ZrO2-metal oxide binary systems (1994)

Lange, F. F. ; Balmer, M. L. ; Levi, C. G.

Springer

Journal of sol gel science and technology 2 (1994), S. 317-321

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ISSN: 1573-4846

Schlagwort(e): diffusion-limited crystallization ; phase diagrams ; metastability ; ZrO2-metal oxide

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Abstract Chemical routes to synthesize inorganics can start with solutions where multiple elements remain well mixed during liquid evaporation, precursor decomposition and crystallization. Because crystallization generally occurs at temperatures where diffusion is very limited, a single phase can crystallize with a greatly extended solid-solution that does not achieve its equilibrium phase assemblage until much higher temperatures where diffusion is no longer constrained. Partitioning at these higher temperatures can lead to unique microstructures such as the nano-composite illustrated here for a metastable Zr(1−x)Al x O2−x/2 (x≤0.57) phase that partitions into a composite containing t-ZrO2 grains and α-Al2O3 plates.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00486263

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