PSI - Issue 59

Mykola Riabchykov et al. / Procedia Structural Integrity 59 (2024) 259–264 Mykola Riabchykov et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 1. Nanostructures of a mixture of divalent and trivalent iron nanowires (Riabchykov et al (2023)).

Magnet technologies of production (Riabchykov et al. (2021)) of foamed materials include mixture of isocyanate, polyol, blowing agent and magnet powder in conditions of magnet field with capacity 1-2 mT (Fig. 2).

Fig. 2. Scheme of production of foamed materials in a magnetic field.

As a result of the introduction of magnetic technology, it becomes possible to create polymer materials with specified porosity parameters. These parameters include the average pore parameter and the density of the location of pores per unit volume. Structural parameters of porous materials undoubtedly affect strength. To determine the strength parameters, traditional research methods based on the destruction of samples were used (Riabchykov et al. (2018)). For this, samples were made from the obtained materials with a square section of 1 x 1 cm and a length of 10 cm, which ensures a convenient location in the grips of the tearing machine. The main parameter determined in this case is σ u – ultimate strength, which is determined by the force at which the material breaks down to the cross-sectional area. 3. Results and discussion The first stage of research involved the study of the structure of porous materials containing magnetic nanocomponents under conditions of a magnetic field. At the same time, the concentration of magnetic nanoscales in the material varied from 0.1 to 0.3%. The intensity of the magnetic field was adjusted in the range from 0 to 1 mT. Microscopic observation with a magnification of 100 times showed significant changes in the structure of the obtained materials. An increase in the content of magnetic nanocomponents, as well as an increase in the strength of the magnetic field, leads to a stable decrease in the size of the pores, as well as a decrease in the dispersion of the size spread. At the same time, the density of these pores increases. Typical pore distributions for various parameters of the content of nanocomponents and the level of the magnetic field are shown in Fig. 3.