Impact-induced damage accumulation at micro- and nanostructural scale levels in sintered powders SiO2, SiC, and Al2O3 and in their single crystal counterparts | Zendy

Alexandre Chmel | Zendy; А. Г. Кадомцев | Zendy; И. П. Щербаков | Zendy

Open Access

Impact-induced damage accumulation at micro- and nanostructural scale levels in sintered powders SiO2, SiC, and Al2O3 and in their single crystal counterparts

Author(s) -

Alexandre Chmel,

А. Г. Кадомцев,

И. П. Щербаков

Publication year - 2016

Publication title -

science of sintering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.309

H-Index - 25

eISSN - 1820-7413

pISSN - 0350-820X

DOI - 10.2298/sos1603273c

Subject(s) - materials science , nucleation , breakage , crystal (programming language) , acoustic emission , luminescence , scaling , homogeneous , composite material , single crystal , chemical engineering , chemical physics , crystallography , thermodynamics , optoelectronics , chemistry , physics , computer science , engineering , programming language , geometry , mathematics

The acoustic emission (AE) and fractoluminescence (FL) techniques were applied to study the impact damage in sintered powders of SiO2, SiC and Al2O3 and their single crystal counterparts. The measured AE intensities and FL amplitudes are proportional to the energy release in events of microcrack nucleation and chemical bond breakage, respectively. In crystals, the AE method showed the random energy release in crystals, and the scaling energy distributions in powders. The FL method evidenced the self-similar energy distributions in α-SiO2 and α-SiC due to nanostructural heterogeneity inherent even to homogeneous solids, while luminescence from α-Al2O3 was specific for the random process

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