Influence of Composition on Fatigue Behavior and Threshold Stress Intensity Factor of Borosilicate Glasses

Abstract

Fatigue behavior of borosilicate glasses was studied using the analysis of subcritical propagation of Vickers indentation cracks. Glasses containing various amounts of glass‐network modifiers, mainly soda, were considered. Cone and median/radial crack systems were observed, depending on glass composition, indenter geometry, and test environment. Indentation tests were performed in water, holding the maximum load for durations ranging from 15 s to 6 d. The analysis of the crack length as a function of dwell time allowed evaluation of the subcritical growth parameters and fatigue limit at crack arrest. The influence of composition on fatigue parameters and fatigue limit was discussed in terms of fourfold‐coordinated boron atoms fraction compared with the content of glass‐network modifier ions.

Soda–borosilicate glass: normal or anomalous behavior under Vickers indentation?

“…For the commercial glass the sum of sodium and potassium oxide content was considered in the analysis. Fundamental physical and mechanical properties measured on the examined glasses [20] are presented in Table 1.…”

“…To investigate the structure of glass network a solid state 11 B NMR analysis was performed 2 [20]. The fraction of 4-fold co-ordinated B atoms, B(IV), was estimated by experiments run on a spectrometer (MSL-400, Bruker, Canada) at 128.29 MHz, using a 5 mm CP-MAS Doty probe.…”

The Extended Range of Reaction-layer Fatigue Susceptibility of Polycrystalline Silicon Thin Films

“…Linear elastic, isotropic, room temperature materials behaviors were assumed for both the polycrystalline silicon substrate (E = 163 GPa, ν = 0.23) (Simmons and Wang, 1971) and silicon dioxide layer (E = 60 GPa, ν = 0.2) (Bertoldi and Sglavo, 2002). This bimaterial system is described by the Dundurs parameters α = −0.47 and β = −0.18, and the corresponding Zak-Williams singularity, s, of 0.39, as calculated using Equations (1) and (2).…”

The indentation fracture toughness (KC) and its parameters: the case of silica-rich glasses

“…Different parameters have a direct and significant influence on the K C values, among which: (i) the indentation load, (ii) the indentation loading time and (iii) the time which elapses between the indentation and the crack-length measurements [5]. it is thus necessary to study the influence of such parameters in order The sub-critical growth of indentation cracks was already reported [6,7] and investigated in the case of a standard soda-lime-silica glass [8], fused silica [9] and borosilicate glasses [10]. In this work, we attempted to characterize and compare the behavior of different glasses from the point of view of the median-radial crack propagation.…”