Fuat OKUMUŞ has completed his PhD in the 1997 from Fırat University in Turkey and then , He has been full professor in the 2010. He has published more than 22 papers in reputed journals and conducted three projects which were supported by TÜBİTAK(Turkey Science and Technology association).He have been performing to the main courses of machine engineering such as strength,statics,failure analysis,composite materials,mechanics of Composite materials,project managements. He is still in charge the director of Department of the Machine Engineering of The Gediz University.
The main goal of this study is to analyze the effect of increasing the amount of titanium dioxide (TiO2) particle filler in polyetherimide (PEI) thermoplastic composite materials, which are widely used in automotive and aircraft components. TiO2 generally improves the stiffness of the materials but reduces their erosion resistance, and filler concentration beyond 10 % impairs the bending strength. In the present study, variation of the bending, thermal, and solid-particle erosive wear properties of TiO2-reinforced PEI thermoplastic composites were investigated by changing the amount of TiO2 filler. The results confirmed that higher filler concentrations improved the bending strength of the composite structure, but decreased their erosion resistance. It was also found that the bending properties of the thermoplastic composite samples eroded at a 90 degree impingement angle remained nearly equal to those of the uneroded samples, whereas they were significantly reduced at a 30 degree impingement angle. We also determined the thermal stability of the composites using thermogravimetric analysis (TGA) methods.
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