Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
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Conference Object Citation - WoS: 3Citation - Scopus: 3Co-Sintering Behaviors of Oxide Based Bi-Materials(American Ceramic Society, 2010) Carry, Claude; Yalamaç, Emre; Akkurt, SedatBi-materials have attracted attention due to combination of properties that such structures can offer. A strong bond between two co-sintered oxide ceramics can provide novel properties. This study focused on the densification and the microstructural evolution during co-sintering of alumina (Al2O3)zirconia (Y-ZrO2) and alumina-spinel (MgAl2O4) bi-materials, produced by co-pressing of powders. High purity submicron powders were uniaxially pressed or co-pressed (150 or 250 MPa). The sintering behaviors of mono and bi-material bodies were investigated using a vertical dilatometer under constant heating rate conditions (from 1 to 10 degrees C/min up to 1580 degrees C). Microstructural characterizations focused on the interface and diffusion layers of bonded bi-materials. Best bonding without cracks were observed on alumina-spinel bi-materials. Macroscopic and microscopic observations are analyzed, interpreted and discussed considering shrinkage and thermal expansion mismatches, residual stresses, diffusion kinetics and oxide phase diagrams.Article Citation - WoS: 1Citation - Scopus: 1ANN model predicts floor tile properties(American Ceramic Society, 2004) Akkurt, Sedat; Özcan, Selçuk[No abstract available]Article Doe and Ann Models for Powder Mixture Packing(American Ceramic Society, 2007) Akkurt, Sedat; Romagnoli, Marcello; Sütçü, MücahitDesign of experiments (DOE) and artificial neural network (ANN) techniques were used to study packing of fused alumina powders composed of three different sizes of particles. The first is the mixture design technique that produces a polynomial model of the powder-packing system. While, the ANN technique is extensively used to model complex systems in many fields. The methodological approach used is mixture design, which can be used to study the influences of two or more additives. It is a structured and organized method for determining the relationship between the components and the output of that process. The mixture design approach permits optimization of size distribution to obtain a target value of porosity. Sensitivity analysis involves the use of the developed ANN model to predict outputs (porosity) at varying levels of the input factor effects.Article Citation - WoS: 11Citation - Scopus: 19Corrosion of Mgo-C Ladle Refractories(American Ceramic Society, 2003) Akkurt, Sedat; Leigh, Herbert DavidThe corrosion behavior of magnesia-carbon (MgO-C) refractories used in slag lines of secondary steelmaking vessels was investigated using a slag test at high temperature under a protective atmosphere of argon or argon and carbon monoxide. For the investigation, a test method was developed and a statistically designed set of experiments was used to develop a polynomial model of corrosion. The model predicted the increased corrosion as time, temperature and oxygen partial pressure in the atmosphere increased and as slag basicity decreased. The degree of slag attack was found to be dependent on the rate of carbon loss.