Cross-section Morphology of the Scratch-Induced Cracks in Soda-Lime-Silica Glass
نویسندگان
چکیده
Scratch-induced cracking is a serious problem for the use of glass products. At the scratch process, both median (vertical to the glass surface) and lateral (horizontal to the glass surface) cracks are formed. In this study, morphology of the scratch-induced cracks in a commercial soda-lime-silica glass was investigated by the scanning electron microscopy for the specimen broken across the scratch groove. Scratch test was carried out using a Knoop indenter in water and in dehydrated heptane. When scratch speed was 70 × 10−6 m s−1, length of both vertical and horizontal cracks was proportional to the normal load at scratching, and environmental dependence was not observed. When scratch speed was increased with the constant normal load of 200 g, length of both cracks was decreased. In the case of horizontal crack, no environmental effect was observed. On the other hand, length of the vertical crack scratched in water was much longer than that in heptane. At very high scratch speed as high as 1,000 × 10−6 m s−1, no vertical crack was formed in the heptane. These differences between horizontal and vertical cracks should be due to the differences of crack initiation position and the influence of subcritical crack growth to these cracks.
منابع مشابه
Dynamic fracture of inorganic glasses by hard spherical and conical projectiles.
In this article, high-speed photographic investigations of the dynamic crack initiation and propagation in several inorganic glasses by the impact of small spherical and conical projectiles are described. These were carried out at speeds of up to approximately 2×10(6) frames s(-1). The glasses were fused silica, 'Pyrex' (a borosilicate glass), soda lime and B(2)O(3). The projectiles were 0.8-2 ...
متن کاملTop Gate Amorphous In−Ga−Zn−O Thin Film Transistors Fabricated on Soda−Lime−Silica Glass Substrates
This work presents a comparative analysis of top gate a-IGZO TFTs fabricated on both soda-lime-silica glass and alkali-free borosilicate glass. Low-temperature ALD is selected for the deposition of gate dielectric to minimize a thermal stress. Comparing with TFTs on alkali-free borosilicate glass, TFTs with soda-lime-glass show similar threshold voltage and subthreshold swing, but slightly degr...
متن کاملFormation and Properties of Laser-Induced Periodic Surface Structures on Different Glasses
The formation and properties of laser-induced periodic surface structures (LIPSS) was investigated on different technically relevant glasses including fused silica, borosilicate glass, and soda-lime-silicate glass under irradiation of fs-laser pulses characterized by a pulse duration τ = 300 fs and a laser wavelength λ = 1025 nm. For this purpose, LIPSS were fabricated in an air environment at ...
متن کاملAnalytical Studies and Identification of Production Process in the Glass Objects from the Underground Hand-Made Architectural Complex of Arzanfood, Hamedan
Study on the production technology in ancient glass artefacts is one of the interesting subject in the field of archaeological sciences. The aim of this study is to identify the chemical composition and production technology in the glass objects discovered form the underground hand-made architectural complex of Arzanfood, near Hamedan, in western Iran. These objects are including some broken pi...
متن کاملA universal relation for edge chipping from sharp contacts in brittle materials: A simple means of toughness evaluation
An analysis of chipping fracture in brittle solids is presented. Cracks are introduced into the edges of selected materials, including soda-lime glass and fine-grain ceramics, using a Vickers indenter in monotonic loading. The ensuing chip morphology is examined and shown to exhibit a certain geometrical similarity, independent of material properties. A simple universal relation is derived for ...
متن کامل