Fracture Analysis of α-Quartz Crystals Subjected to Shear Stress
| Autor: | Francesco Gallucci, Paolo Plescia, Giovanni Martinelli, Enrico Paris, Emanuela Tempesta |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
lcsh:Mineralogy lcsh:QE351-399.2 010504 meteorology & atmospheric sciences fracturing tribochemistry Geology respiratory system 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology Microstructure 01 natural sciences Cristobalite quartz shear stress Stress (mechanics) Tridymite Shear stress Fracture (geology) Composite material Quartz Intensity (heat transfer) 0105 earth and related environmental sciences |
| Zdroj: | Minerals, Vol 10, Iss 870, p 870 (2020) Minerals Volume 10 Issue 10 |
| Popis: | This study assesses the correlations between the intensity of stress undergone by crystals and the morphological characteristics of particles and fracturing products. The effects of the fractures on the microstructure of quartz are also studied. Alpha quartz, subjected to shear stress, is quickly crushed according to a fracturing sequence, with a total fracture length that is correlated to the stress rate. The shear stress generates a sequence of macro and microstructural events, in particular localized melting phenomena, never highlighted before on quartz and the formation of different polymorphs, such as cristobalite and tridymite together with amorphous silica. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|