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Multifunctional Structural Ceramics with Ferroelastic and Martensitic Transformations

机译：具有铁弹性和马氏体转变的多功能结构陶瓷

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This program had 2 objectives that were pursued simultaneously. These objectives were: (i) development of process models designed to produce a new family of tough and novel ceramic materials with specific microstructures and (ii) coordinate the findings of the proposed research with the parallel efforts on the material characterization addressed from the atomistic and continuum length scales, where correlations are made between atomic structure and bonding. It was concluded that the growth of: single crystal mullite is controlled by kinetics and is a non-equilibrium process. Liquid-liquid immiscibility and slow diffusion rate of cations did not permit the growth of3:2 mullite single crystals. Using numerical modeling, we investigated the solidification of representative oxide crystals. The interactive effects of radiative heat transfer and convection on solidification of: oxide crystals was experimentally investigated and isolated numerically in order to optimize the growth conditions for solidification of the materials. A combined conduction convection radiation model of solidification was developed for the oxide crystals which are transparent to radiation below wavelength of 6 micron and opaque to radiation in the rest of the spectrum.

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