Mechanical response of novel SiOC glasses to high temperature exposition

Halasová, Martina; Chlup, Zdeněk; Strachota, Adam; Černý, Martin; Dlouhý, Ivo

doi:10.1016/j.jeurceramsoc.2012.07.023

Cited by 22 publications

(9 citation statements)

References 11 publications

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“…Therefore, these materials feature both SiO 2 and SiC bonds. This leads to the strengthening of glass structure and enhancement of its properties, i.e., chemical, thermal, and oxidation resistance [1][2][3][4]. Two main concepts of silicon oxycarbide structures exist.…”

Section: Introductionmentioning

confidence: 99%

Thermal evolution of ladder-like silsesquioxanes during formation of black glasses

Jeleń

Szumera

Gawęda

et al. 2017

J Therm Anal Calorim

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Pyrolysis of ladder-like silsesquioxanes in oxygen-free atmosphere leads to the formation of silicon oxycarbides (black glasses). Black glasses are materials of amorphous silica structure where some amount of O 2-ions were replaced by C 4-ions. This exchange leads to local increase in bonds density and therefore improvement in mechanical, thermal, and chemical properties. Thanks to this modification, silicon oxycarbide glasses can be used in a variety of applications like: protective coatings and interconnectors in solid oxide fuel cells. Xerogels were prepared by sol-gel method, and ladder-like silsesquioxanes were used as precursors. Samples were burned at 200-1000°C in inert atmosphere. Structural studies in the middle infrared range (MIR) and SEM with EDX confirmed the presence of SiOC bonds in obtained materials. MIR analysis of solid samples together with TG/dTG measurements allowed defining the process for the formation of black glasses.

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Section: Introductionmentioning

confidence: 99%

Thermal evolution of ladder-like silsesquioxanes during formation of black glasses

Jeleń

Szumera

Gawęda

et al. 2017

J Therm Anal Calorim

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“…For all the composite materials studied, the same matrix precursor i.e., polymethylsiloxane resin Lukosil M130 (Lučební závody a.s., Czechia) was used. This resin was used for the production of pyrolysed composites or studied with this intent in previous works [27][28][29][30]. A great advantage of this resin is its low weight loss during pyrolysis.…”

Section: Componentsmentioning

confidence: 99%

“…The temperature resistance of partially pyrolysed composites has already been investigated in several studies [1,20,23,28]. Most of the experiments described were designed to verify properties important for applications at elevated temperatures.…”

Section: Temperature Resistance Of the Composites Investigatedmentioning

confidence: 99%

Potential of Glass, Basalt or Carbon Fibres for Reinforcement of Partially Pyrolysed Composites With Improved Temperature and Fire Resistance

Černý¹

2019

Ceramics - Silikaty

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The study considers the mechanical properties and temperature resistance of partially pyrolysed composites reinforced with various fibres. The composites were prepared by pyrolysis at 650 °C, where only partial conversion of the polymer to the inorganic SiOC structure takes place in the matrix. Such a hybrid matrix bears resemblance to polymeric materials in a density and Young's modulus, but oxidation resistance and creep behaviour are closer to silicate glasses. Pyrolysis also ensures that the whole composite material is non-flammable with very low potential for releasing toxic gases during a fire. Three types of glass fibres (E-glass, R-glass, E-CR-glass fibres), two types of basalt fibres, and two types of high-strength (HS) carbon fibres were used as reinforcements. The mechanical properties-Young's and shear moduli, flexural strength, and fracture toughness-were measured at room temperature. Thermogravimetric measurements and creep tests of these composites allowed estimation of their temperature resistance and fire resistance. The results obtained suggest that the materials under investigation can be applied as panels or shells in the building industry and in transportation facilities.

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“…To improve the toughness it is necessary to reinforce the SiOC glass, for example by fibres. 12,14,15 The advantageous properties of SiOC glass are frequently utilised in preparation of high-temperatureresistant composites. During fabrication of the fibre reinforced composites, the reinforcement is saturated by diluted resin in order to form prepregs, which are subsequently dried, cured and finally pyrolysed.…”

Section: Introductionmentioning

confidence: 99%

“…3 The SiOC glass has generally amorphous structure stable up to 1300 C and above this temperature the SiO groups in amorphous glassy phase crystallise in the cristobalite modification. 12,13 Some of laboratory prepared, as well as commercial polymeric precursor forming SiOC glasses under previous investigations showed promising properties for high temperature applications. At the temperatures above 1000 C it undergoes transformation into fully inorganic material and becomes brittle.…”

Section: Introductionmentioning

confidence: 99%

Fracture response of SiOC-based composites on dynamic loading

Halasová

Černý²,

Strachota

et al. 2015

Journal of Composite Materials

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The fracture resistance to the dynamic loading of composites based on partially pyrolysed SiOC glass reinforced with basalt fibres was investigated using an instrumented impact test. The three-point bend loading configuration of the specimen bars prepared from the composite plate was used. Evolution of the matrix during the pyrolysis plays a key role in creation of bonding between the matrix and fibres, which was in the form of woven fabrics. Different temperatures of pyrolysis were applied in order to determine their influence on the fracture behaviour during impact tests. The high speed camera was employed to observe fracture response to impact loading during the fracture process. The temperature range for pyrolysis was chosen from 600 to 800 C with the step of 50 C. The partial melting of basalt fibres occurred at temperatures above 800 C. Observation of fractographic features on the fracture surfaces was performed using scanning electron microscopy.

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Mechanical response of novel SiOC glasses to high temperature exposition

Cited by 22 publications

References 11 publications

Thermal evolution of ladder-like silsesquioxanes during formation of black glasses

Thermal evolution of ladder-like silsesquioxanes during formation of black glasses

Potential of Glass, Basalt or Carbon Fibres for Reinforcement of Partially Pyrolysed Composites With Improved Temperature and Fire Resistance

Fracture response of SiOC-based composites on dynamic loading

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