What is it about?
We use in situ high pressure neutron diffraction and 27Al NMR spectroscopy to investigate the structure of two generic aluminosilicate glasses. The results show distinct pressure dependent deformation regimes that map onto the production of permanently densified materials. The findings are combined with those from other experiments to produce a self-consistent model for pressure-induced structural change.
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Why is it important?
Amorphous aluminosilicates are omnipresent, featuring in the smart phone in one’s pocket and the ground below our feet. The new findings on their structural chnages under pressure is key to understanding their deformation and associated material properties such as the hardness, fracture toughness and viscosity.
Perspectives
Is is remarkable that a single parameter can be employed for rationalizing the aluminosilicate glass structures, irrespective of the material composition or its pressure and temperature history.
Professor Philip S Salmon
University of Bath
Read the Original
This page is a summary of: Transformations to the aluminum coordination environment and network polymerization in amorphous aluminosilicates under pressure, The Journal of Chemical Physics, August 2024, American Institute of Physics,
DOI: 10.1063/5.0218574.
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