Instrumented Indentation of Super-Insulating Silica Compacts
AbstractHighly porous silica compacts for superinsulation were characterized by instrumented indentation. Samples showed a multi-scale stacking of silica particles with a total porous fraction of 90 vol %. The two main sources of silica available for the superinsulation market were considered: fumed silica and precipitated silica. The compacts processed with these two silica displayed different mechanical properties at a similar porosity fraction, thus leading to different usage properties, as the superinsulation market requires sufficient mechanical properties at the lowest density. The measurement of Young’s modulus and hardness was possible with spherical indentation, which is an efficient method for characterizing highly porous structures. Comparison of the mechanical parameters measured on silica compacts and silica aerogels available from the literature was made. Differences in mechanical properties between fumed and precipitated compacts were explained by structural organization. View Full-Text
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Benane, B.; Meille, S.; Foray, G.; Yrieix, B.; Olagnon, C. Instrumented Indentation of Super-Insulating Silica Compacts. Materials 2019, 12, 830.
Benane B, Meille S, Foray G, Yrieix B, Olagnon C. Instrumented Indentation of Super-Insulating Silica Compacts. Materials. 2019; 12(5):830.Chicago/Turabian Style
Benane, Belynda; Meille, Sylvain; Foray, Geneviève; Yrieix, Bernard; Olagnon, Christian. 2019. "Instrumented Indentation of Super-Insulating Silica Compacts." Materials 12, no. 5: 830.
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