Ediz Ercenk

The effect of clay on foaming and mechanical properties of glass foam insulating material

In the current study, the main composition was prepared using soda-lime glass with dolomite [CaMg(CO3)2] as a foaming agent. The clay powder was added to the main composition in different ratios, and then, the mixtures were shaped by one-axial pressing. Differential thermal analysis (DTA) was used for the determination of crystallization temperatures, and the samples were heated according to the DTA results. Furthermore, heating microscopy was employed for studying the high-temperature behaviours of the mixtures. The samples were characterized using scanning electron microscopy, X-ray diffraction analysis, and comprehensive strength testing. Porosity and bulk density were measured to assess the foaming capability of the mixtures. The results showed that clay addition has a positive role on the mechanical properties of glass foam.

Crystallization kinetics of basalt-based glass-ceramics for solid oxide fuel cell application

Solid oxide fuel cell (SOFC) is a very efficient and clean source of energy. The glass and glass-ceramics are the most suitable and compatible sealing materials for SOFC. The crystallization kinetics of glass sealants is an essential parameter to check the suitability of glass as a sealant. In this study, the crystallization behavior of a novel sealing glass developed from the volcanic rock basalt suitable as an SOFC sealant is investigated via differential thermal analysis using the Kissinger kinetic model with several different heating rates. Development of crystalline phases on thermal treatments of the glass at various temperatures has been followed by X-ray diffraction. Augite and diopside are the primary crystalline phases in crystallized glass-ceramic seals. The results show that the basalt base glass-ceramic sealant material exhibited promising properties to use for SOFC.

Tribological Properties of SiC-Reinforced Basalt-Based Coatings

In the current study, the wear behaviour of basalt-based glass and glass–ceramic coatings was investigated. SiC-reinforced basalt-based powders were coated by an atmospheric plasma spray process and evaluated using the ball-on-disk wear test. X-ray diffraction analysis, scanning electron microscopy, and optical microscopy were employed for characterisation. The friction coefficients of the basalt-based glass and glass–ceramic coatings ranged from 0.38 to 0.55 and from 0.12 to 0.70, respectively, depending on the wear condition and SiC content. The wear test results show that SiC addition has a positive effect on the wear resistance of the glass and glass–ceramic coatings.