پديد آورنده :
طاووسي، مجيد
عنوان :
توليد و مشخصه يابي نانو كامپوزيت هايAl-Zn/Al2O3 به روش آلياژ سازي مكانيكي و پرس گرم
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
چهارده، 104،[II] ص: مصور، جدول، نمودار
يادداشت :
ص. ع به: فارسي و انگليسي
استاد راهنما :
فتح الله كريم زاده، محمد حسين عنايتي
توصيفگر ها :
نانو كريستال , فاز آمورف , بالك توليدي
تاريخ نمايه سازي :
8/2/87
استاد داور :
احمد كرمانپور، كمال جانقربان
چكيده فارسي :
به فارسي و انگليسي: فابل رويت در نسخه ديجيتال
چكيده انگليسي :
AbstractIn this study fabrication and characterization of alumina particles reinforced aluminumbased metal matrix nanocomposite by mechanical alloying and hot pressing wasinvestigated Aluminum and zinc oxide powders mixture milled by a planetary ball milland hot pressing the samples at 400 and 500 C under 400 MPa led to fully dense bulk Al 13 4wt Zn 5vol Al2O3 nanocomposite The structural evaluation milled and annealedpowders studied by x ray diffraction SEM observation and hardness measurement Thealuminum crystallite size estimated with broadening of XRD peaks by Williamson Hallformula The results showed that milling of aluminum and zinc oxide for 60h led todisplacement reaction of the zinc oxide and aluminum to produce Zn and Al2O3 phases The milled powder had a microstructure consisting of nanosized Al2O3 particles in an Al Zn solid solution with a nanoscale grain size of 40nm The zinc oxide was found to bereacted with Al through a rapid self sustaining combustion reaction process instoichiometric composition As a result a zinc matrix composite reinforced by Al2O3particulate was formed The results showed that in early stage of milling the solubility limitof Zn in Al is extended compared to equilibrium value It was also observed that the latticeparameter of the Al matrix in the as milled powder decreased as a function of the content However after longer milling times decomposition of Zn supersaturated Al solidsolution appeared to occur leading to an increase of Al lattice parameter In this state softening due to the decomposition of the supersaturated solid solution dominates over thework hardening and grain refinement effects reducing the hardness of as milled powder
استاد راهنما :
فتح الله كريم زاده، محمد حسين عنايتي
استاد داور :
احمد كرمانپور، كمال جانقربان
