This analysis demonstrates structural changes in Si3N4 nanopowders after electron irradiation, suggesting significant impacts on material properties.
The structural and vibrational properties of Si₃N₄nanopowders were investigated before and after electron irradiation at fluences of 1×10¹⁵, 5×10¹⁵, and 1×10¹⁶e/cm². X-ray diffraction analysis revealed that the material retains its biphasic nature (α- and β-Si₃N₄) after irradiation, although changes in phase fractions and lattice parameters were observed. FTIR spectroscopy (400-1300 cm⁻¹) showed shifts in peak positions and variations in intensities, indicating bond rearrangements and modifications in the local Si-N and Si-O environment. Raman spectroscopy further confirmed irradiation-induced structural changes through systematic peak shifts and spectral modifications. The results demonstrate that electron irradiation significantly affects the local structure and defect formation in Si₃N₄nanopowders while preserving the overall crystalline phases.
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Tashmetov et al. (2026) studied this question.
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