Abstract
Oxynitride glasses with five different compositions were prepared by melting batches at 1600°C for 2h under N2 atmosphere in a Si–Mo-heated resistance furnace. The amorphous nature of these samples was verified by an X-ray diffractometer with Cu/Kα radiation. UV/visible wavelength region light transmission spectra of samples showed that the transmittance of the obtained glasses (1mm, 2mm and 3mm thickness) can reach up to 80% in the visible region (above 400nm). The Vickers indentations were analyzed by the scanning electron microscopy (SEM). The ballistic resistance represented by Drel value was assessed by physical and mechanical properties including density, hardness, elastic modulus and fracture toughness. It was found that the Drel value of oxynitride glasses can reach up to 2.56 and is higher than that of sapphire, which is 2.4.
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