پديد آورنده :
خدايي، مهدي
عنوان :
سنتز مكانوشيميايي نانوكامپوزيت Fe3AL-AL2O3 و بررسي خواص آن
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
چهارده، 106، [II]ص: مصور، جدول، نمودار
يادداشت :
ص.ع. به: فارسي و انگليسي
استاد راهنما :
محمد حسين عنايتي، فتح الله كريم زاده
توصيفگر ها :
دي سيليسايد موليبدن , نانو كريستال , سينترينگ
تاريخ نمايه سازي :
07/03/87
استاد داور :
محمد حسين فتحي، محمد حسين پايدار
چكيده فارسي :
به فارسي و انگليسي: قابل رؤيت در نسخه ديجيتال
چكيده انگليسي :
AbstractFe3Al intermetallic compound is an important class of materials because of a combination of itshigh tensile strength low density good wear resistance ease of fabrication and low cost It also hasexcellent oxidation sulfidation and corrosion resistance at high temperature These properties haveled to the identification of several potential usages including structural applications and protectivecoatings in hostile environments Two major problems that restrict the application of Fe3Al arepoor low temperature ductility and inadequate high temperature creep resistance These limitationscan be overcome by introducing ceramic particles as reinforcements The goal of this work isfabrication of Fe3Al intermetallic compound with Al2O3 reinforcement via mechanochemicalprocess The phase transformation and microstructural characterization during mechanochemicalreaction were investigated by X ray diffractometery XRD scanning electron microscopy SEM Transmission electron microscopy TEM with an energy dispersive spectrometer EDS attached and thermal analysis DTA Mechanochemical behavior of different Fe Al and Fe2O3 powdermixtures to fabrication of Fe Al2O3 Fe3Al 57 vol Al2O3 Fe3Al 30 vol Al2O3 was studiedaccording to the calculated adiabatic temperature of reactions vial temperature measurementduring milling and structural investigations Fe3Al 57 vol Al2O3 and Fe3Al 30 vol Al2O3nanocomposite powders were compacted and then sintered at 1400 C for 1 h The consolidatedFe3Al 57 vol Al2O3 part had an ultrafine and homogeneous structure without core rim featureconsisting of Fe3Al and Al2O3 phases The consolidated Fe3Al 30 vol Al2O3 part had ahomogeneous and interconnected network of Fe3Al matrix In addition Fe3Al 30 vol Al2O3 wasalso fabricated by mechanical alloying of Fe Al and nano Al2O3 in order to compare the effect ofthe addition route of Al2O3 phase in Fe3Al matrix on sintering behavior and mechanical properties The results showed that the Fe3Al 30 vol Al2O3 fabricated through mechanochemical processhad higher three point fracture stress and hardness than Fe3Al 30 vol Al2O3 fabricated byaddition of Al2O3 nanopowders
استاد راهنما :
محمد حسين عنايتي، فتح الله كريم زاده
استاد داور :
محمد حسين فتحي، محمد حسين پايدار
