Thermo-physical selection of components for dispersion cast composites
Mirosław Cholewa Politechnika Śląska, Wydział Mechaniczny Technologiczny, Instytut Materiałów Inżynierskich i Biomedycznych, Zakład Odlewnictwa ul. Towarowa 7, 44-100 Gliwice
Quarterly No. 4, 2005 pages 82-87
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abstract In presented work evaluation method for thermo-physical parameters influence on kinetic factors of composite matrix solidification is shown. A methodology has been proposed for thermo-physical matching evaluation of components. Relations of temperature, thermal gradient and temperature first derivative after time in close neighborhood of the reinforcing particle (Fig. 1). In Figure 2 the graphical way of simulation analysis results interpretation is shown which can be used for proper components selection in respect of solidification and crystallization process control. Studies concern flat virtual models and unidirectional heat flow with extremely different components thermal properties and its initial temperatures. As the results author obtained methodology of components thermo-physical properties selection. This procedure can also take into account statistical particles shape obtained in quantitive analysis and their description with use of morphology modulus. Evaluation of mismatch value for the components is realized by some thermal quantities comparison: temperature and its derivatives after time and heat flow direction. Compared are the calculation systems with and without (containing only the alloy matrix) the model of reinforcing particle. One of the features of the system is geometrical and thermo-physical relation between the components and interface, which models the heat flow kinetics. On this basis the structural properties of the matrix can be forecast in the particle neighborhood. Key words: casting, composite, solidification, simulation