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    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, Hamdi
    New 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.
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    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, Recep
    The 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.
  • Küçük Resim
    Öğe
    Investigation of wear resistance of the porcelain tile bodies by solid particle impingement using alumina particles
    (SPRINGER, 2020) Aydin, Tuna; Bican, Osman; Gumruk, Recep
    Wear resistance is of great importance for many industries related with minerals. The particles seen in these industries may cause erosion. These particles may have various sizes, shapes, and hardness, and may also impact the surface at various angles and speeds. Wear resistance is also important for the ceramic tile industry because the materials, which are also used in building facades, must withstand all kinds of weather conditions. In this study, the wear resistance of the porcelain tile bodies was investigated by solid particle impingement using alumina particles. The effects of technological, mechanical, and microstructural properties on wear resistance were also investigated. It was determined that the technological, mechanical, and microstructural properties were improved with the addition of spodumene, which also caused that the wear rates were reduced.
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    Öğe
    Wear Resistance of Aluminum Alloy A356 After Thorough Anodic Oxidation
    (Springer, 2023) Basyigit, Aziz Baris; Azakli, Zeki; Gumruk, Recep; Bican, Osman
    The efficiency of thorough anodic oxidation of ASTM A356 aluminum alloy as an alternative to painting its surface is studied. Microstructure, phase composition, and microhardness of oxidized layers of various thicknesses (45, 65, 80 and 90 mu m) are determined. Solid particle erosion tests are conducted in accordance with ASTM G76 and MIL STD 3033. It is established that with an increase in oxidized layer thickness aluminum alloy wear resistance is reduced and the surface roughness is reduced.