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Öğe Development of Optical, Microstructural and Mechanical Properties of Porcelain Stonewares(Int Inst Science Sintering (I I S S), 2021) Aydin, Tuna; Bican, Osman; Gumruk, Recep; Kuleyin, HamdiNew production systems developed in recent years made it possible to improve different aesthetic appearance and large sizes for porcelain stonewares. In order to produce these tiles, optical and mechanical properties of the porcelain stonewares should be improved. Optical and mechanical properties also related with microstructure. In this study, spodumene, alumina and zircon were used to improve the microstructure of the porcelain stonewares and consequently their optical and mechanical properties. The wear resistance of porcelain stonewares is the one of the most important mechanical properties. In this study, a different test method was used because the existing wear test methods on the tiles were insufficient. The solid particle impingement method using alumina particles was used to determine wear resistance of the porcelain stoneware bodies.Öğe Effect of Boronizing on Operating Stability of Steel AISI 304L under Erosion Impact of Hard Particles(Springer, 2021) Bican, Osman; Bayca, Salih Ugur; Kuleyin, Hamdi; Gumruk, RecepThe effect of solid boronizing at 950 degrees C for 2 and 4 h on the phase composition, microstructure, hardness and abrasive wear of steel AISI 304L is studied under the impact of a flow of hard particles. The boronized steel is shown to consist of three layers (metal boride, porous layer and matrix) from the external surface to the center. The hardness of the boride is much higher than that of the matrix phase. The wear resistance of the steel is the highest after the 2-h boronizing, and the wear depends on the angle of impact of the hard particles on its surface. With growth of the duration of the boronizing the wear behavior of the steel changes from ductile one to brittle one.
