Abstract
Vickers and Knoop indentation techniques and density measurements have been employed to study the structure of two series of glasses in the system CaOROSiO 2P 2O 5CaF 2 (R = Sr, Ca, Mg) with: (a) constant alkaline earth oxide content, but using different cations (Ca, Ca + Sr, Ca + Mg), and (b) increasing alkaline earth concentration (Mg and/or Ca). Samples have been prepared by melting the raw materials at 1400°C, and pouring the liquid on a steel plate. From the experimental data, microhardness, H V, fracture toughness, K IC, and values for mean atomic volume, V A, and ionic volume fraction, V F, were obtained. The last parameter is proposed as a suitable one for the analysis of variations in cationic coordination numbers, n. The results show that Mg, Ca and Sr have similar values of n. The value of n is proposed to be six.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
