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We suggested how to obtain a high volume percentage of effective, stable and finely dispersed oxide particles. New dispersoids, created in the modeling process, consist of core and coat. The core is formed by internal oxidation of the soluble alloying element, whereas the oxide of the lower-solubility alloying element envelops the previously precipitated oxide and creates the coat with the appropriate particle/matrix interface.According to the proposed model the ternary alloying system Cu±Al±Zr was identified as one of the most promising candidates for the experimental confirmation of the proposed modeling process. It was confirmed that in rapidly solidified Cu±Al±Zr alloys internal oxidation proceeds with timeshifted precipitation of the oxides Al 2 O 3 and ZrO 2 at the internal oxidation front. The Al 2 O 3 oxide particles precipitate first from the solid solution and serve as seeds for heterogeneous precipitation of ZrO 2 oxide. Oxidation of zirconium starts with dissolution of Cu±Zr intermetallic particles ahead of the IO front, continues with diffusion of dissolved Zr atoms down the concentration gradient, and concludes with heterogeneous precipitation on the previously formed Al 2 O 3 oxide particles.

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