مشخصات پژوهش

عنوان	Characterization of a functionally graded material produced using a new designed blender
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	blender, Mg-TiO2 FGM, dynamic compaction, powder metallurgy, split Hopkinson bar
چکیده	One of the techniques widely used for fabrication of FGMs (Functionally Graded Materials) is powder metallurgy. However, producing aFGMwith smooth gradient in its constituents mixture has remained a challenge yet to be met. The purpose of this research is design and manufacturing a blender for producing a functionally graded material with smooth gradient of its constituent materials. The blender was used to mix magnesium and titanium dioxide to produce Magnesium/titanium dioxide FGMs. The powder mixture was then compacted by Instron, drop hammer, and split Hopkinson bar at 600 °C. The microstructure and relative density of the functionally graded samples fabricated at different strain rates were studied in this work. SEM images clearly demonstrated a continuous and functional distribution ofMgand TiO2 particles in the producedFGMsamples. It was also shown that increasing the compaction loading rate resulted in a higher relative density in theFGMsamples. The maximum relative density (92%) was observed for the samples produced by Hopkinson bar. This level of density was7%and 17% higher than the densities of the samples fabricated using drop hammer and Instron, respectively. The improvement of relative density in dynamic compaction methods is attributed to the increased compaction pressure and process being adiabatic.
پژوهشگران	کاوه رحمانی (نفر اول)، غلامحسین مجذوبی (نفر دوم)، das raj (نفر سوم)