The influence of the pyrolysis process on mechanical parameters and tightness of the black glasses layers on titanium substrates

Gawęda, M.; Długoń, E.; Leśniak, Magdalena; Kurpaska, Ł.; Simka, Wojciech; Sowa, Maciej; Sitarz, Maciej

doi:10.1016/j.ceramint.2017.05.340

Cited by 16 publications

(9 citation statements)

References 32 publications

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“…The detailed x‐ray diffraction, spectroscopic and computational studies enabled us to unequivocally state that relatively well defined ladder‐like silsesqiuoxanes were obtained by xerogel drying. The most recent study focusing on the mechanical parameters, adhesion and tightness of the layers, presents their applicability as the material for medicine.…”

Section: Resultsmentioning

confidence: 99%

Bioactive layers based on black glasses on titanium substrates

et al. 2017

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Black glasses are amorphous materials based on silicon oxycarbide. The use of precursors in the form of ladder‐like silsesquioxanes enables the control of the amount of carbon ions in the glass network by adjusting ratios of T to D structural units in precursors. In this study, four different sols precursors of four different layers of black glasses on titanium substrates were prepared. The materials were analyzed with the use of various spectroscopic and microscopic methods. Formation of continuous and hermetic layers resistant to corrosion was proven. The black glasses layers were examined as materials for biomedical applications. Therefore, preliminary tests of their bioactivity and biocompatibility were performed. The best results were obtained for the material of lower contribution of carbon ions.

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Section: Resultsmentioning

confidence: 99%

Bioactive layers based on black glasses on titanium substrates

et al. 2017

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“…Therefore, the maximum of indentation depth was intentionally controlled to be around 100 nm. In order to eliminate creep of the coating, the maximum load duration was 2 seconds . Loading and unloading time were 10 seconds and 5 seconds, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…In order to eliminate creep of the coating, the maximum load duration was 2 seconds. 30 Loading and unloading time were 10 seconds and 5 seconds, respectively. In order to ensure the reliability of the experiment, indentations at given load were repeated 10 times in line, with the distance of 50 μm from each other.…”

Section: Characterizationmentioning

confidence: 99%

Strengthening mechanism of cover glass by Sol‐Gel SiO₂ coating

Zhou

Wen

et al. 2019

Int J of Appl Glass Sci

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Strengthening is a huge challenge of ultrathin cover glass in mobile electronic devices. In this paper, a transparent sol‐gel silica coating has been sprayed on the surface of chemically strengthened cover glass, and three different coatings (identified as thickness/curing temperature: 3 μm/80°C, 5 μm/80°C, and 3 μm/180°C) have been prepared. Characterized by four‐point bending experiment, the strengthening effects of three coatings, representing by the increases of strength of the coated glass, are 47 MPa, 98 MPa, and 58 MPa for 3 μm/80°C, 5 μm/80°C, and 3 μm/180°C, respectively. Based on finite element simulation and experimental data of four‐point bending, the influence of four parameters of surface coating (elastic modulus, residual stress, filling ratio, and thickness) on glass strengthening has been investigated. Simulation analysis shows that the increase of elastic modulus, residual stress, and filling ratio of the SiO2 coating facilitates the increase of bending strength of cover glass, and the coating thickness has less influence on the glass strength. However, the experimental results demonstrate that the coating thickness has a significant impact on the strength of glass: when the layer thickness of sample cured at 80°C increases from 3μm to 5μm, the bending strength of glass can improve by 51MPa. Since greater coating thickness induces greater filling ratio, which is the main contributor to the strengthening effect of increased coating thickness, so, elastic modulus, residual stress, and filling ratio of the coating are the three key factors of the cover glass strengthening.

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“…In this case, the NanoTest Vantage from MicroMaterials Laboratory (MML) was used with a Berkovich tip and loads from 1 to 10 mN. What is interesting in this case is that the hardness was measured as the gel was converted to "black glass", as it was fully pyrolyzed [17]. Reasoning that black glass contains direct Si-C bonds which are stronger than Si-O bonds, they observed an initial increase in hardness between 500 and 600°C.…”

Section: Author Manuscriptmentioning

confidence: 99%