Infrared and X-ray photoelectron spectroscopy studies on sodium borosilicate glass interacted with thermally oxidized aluminides formed on Alloy 690

Add time:08/09/2019    Source:sciencedirect.com

Thermally oxidized aluminides formed on Ni–Cr–Fe based Alloy 690 substrates were subjected to interaction with sodium borosilicate melt (used as matrices for immobilization of high-level radioactive liquid waste) at 1248 K for 192 h. The glass samples were analyzed by Fourier transform infrared spectroscopy. The observed bands in mid-infrared spectra of reacted glass correspond to the vibrational bands of specific groups, and those in far-infrared region revealed the distinct spectral features of stretching and bending AlO vibrations. In X-ray photoelectron spectra of O1s region of reacted glass, non-bridging oxygen component disappeared due to incorporation of aluminum in the glass structure. Chemical shift towards higher energy side in B1s photoelectron spectra of reacted glass indicated the modified glass structure in consequence of inclusion of Al+ 3 in glass network.

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