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Molecular dynamics study on nano‐particles reinforced oxide glass
Author(s) -
Urata Shingo,
Ando Ryota,
Ono Madoka,
Hayashi Yasuo
Publication year - 2018
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15378
Subject(s) - materials science , composite material , nanoparticle , fracture mechanics , oxide , fracture (geology) , fracture toughness , molecular dynamics , amorphous solid , deformation (meteorology) , soda lime glass , cracking , toughness , matrix (chemical analysis) , nano , nanotechnology , metallurgy , chemistry , computational chemistry , organic chemistry
Energy release rate and fracture toughness of amorphous aluminum nanoparticles reinforced soda‐lime silica glass (SLSG) were measured by performing fracture simulations of a single‐notched specimen via molecular dynamics simulations. The simulation procedure was first applied to conventional oxide glasses and the accuracy was verified with comparing to experimental data. According to the fracture simulations on three models of SLSG/‐Al 2 O 3 composite, it was found that the crack propagation in the composites is prevented through following remarkable phenomena; one is that a‐Al 2 O 3 nanoparticles increase fracture surface area by disturbing crack propagation. The other is that the deformation of a‐Al 2 O 3 nanoparticle dissipates energy through cracking. Moreover, one of the models shows us that the crack cannot propagate if the initial notch is generated inside a‐Al 2 O 3 nanoparticle. Such strengthening is partly due to the fact that the strength of the interface between nanoparticle and SLSG matrix is comparable to that of SLSG matrix, implying that their interface does not reduce crack resistance of the oxide glass.