Method for an Integrated Study of the Transition Layer of the Core-Shell in Ceramic Matrix Composites of Semi-Dry Pressing
It has been noted the effect of interfacial interaction between the components of the dispersion medium and the dispersed phase on the physicomechanical and chemical properties ofceramic matrix composites. It largely depends on the mechanical compatibility of the components of the raw materials. It has been shown the formation of a transition layer at the interfacebetween the shell (matrix) and the core (aggregated filler material) of a ceramic material with a matrix structure. A technique is proposed for the differential study of phase transformationsand the kinetics of the occurrence of physicochemical reactions at the interface between the dispersion medium and the dispersed phase. The concept of manufacturing a multilayersample modeling at the macro level the transition between the shell and the core of the ceramic matrix composite is shown. It has been given the ratio of the raw materials of thecore and shell for the preparation of various layers of the model sample using technogenic and natural raw materials. The critical conditions for obtaining multilayer model samples areconsidered depending on the chemical and mineralogical composition and ceramic properties of the raw material. A block diagram of the method for determining the phase compositionand properties of the core - shell transition layer in semi - dry pressed ceramic matrix composites has been developed. It was revealed the active interaction of the matrix shell with silicateand oxide phases of the core in the transition zone. A significant excess of strength indicators was established compared with the additive strength of the ceramic material after firingof the mixture of components during organizing the matrix structure.