Investigation of the resistance of K-208 glasses with optically transparent Al-Si-N nanocomposite coatings to the impact of high-speed microparticles

The results of the research of the phase composition and the mechanical properties of the coatings on the basis of the Al-Si-N system produced by pulsed magnetron sputtering on the K-208 glass substrates are presented in this paper. By the X-ray diffraction method it has been founded that there are the AlN crystallites (hcp) 6 μm in thickness in the coatings. The deposition of the Al-Si-N coating system allows not only to increase the microhardness of the surface layer of the glass up to 30 GPa but also maintain a high level of the elastic properties (We> 0.70%). The laboratory tests have been carried out on the impact of the high-speed flows of iron particles on the Al-Si-N protective coating produced by pulsed magnetron sputtering. It was established that the deposition of protective coatings of the Al-Si-N system 6 μm in thickness leads to increasing of the resistance of K-208 glass samples by 2.8 times to the impact of iron microparticles accelerated up to 8 km/s.

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