پديد آورنده :
صنايعي، محسن
عنوان :
ساخت كامپوزيت ريختگي آلومينيوم-آلوميناي ذره اي در جا از طريق واكنش هاي آلومينوترمي مخلوط چند گانه پودرها
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
ريخته گري فلزات
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي مواد
صفحه شمار :
سيزده، 102ص.: مصور، جدول، نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
محمود مرآتيان
استاد مشاور :
مسعود پنجه پور
توصيفگر ها :
كامپوزيت زمينه فلزي , ريخته گري كوبشي , فعال سازي مكانيكي
تاريخ نمايه سازي :
14/1/90
استاد داور :
محمد حسين فتحي، مسعود امامي
تاريخ ورود اطلاعات :
1396/10/10
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Synthesis of Cast Particulate In Situ Aluminum Alumina Composite by Aluminothermic Reaction of Multi Powders Mixture Mohsen Sanayei m sanayei@ma iut ac ir Date of submission 10 11 2011 Department of Materials Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Mahmood Meartian meratian@cc iut ac irAbstractAmong all metal matrix composites aluminum matrix composites are one of the applicable kinds of compositesin vehicle manufacturing aerospace and military industries due to their high strength wear and oxidationresistance and low thermal expansion coefficient In Situ method is one of the new routes for aluminumcomposites manufacturing in which reinforcement phase is formed within the matrix through chemical reactionbetween elements or other compounds with elements In this case small size reinforcement particles with anappropriate dispersion in the matrix are obtained The most important advantage of In Situ method is thesuitable wettability of reinforcement particles by the melt In this research zinc oxide and copper oxide powderswere utilized as additive materials to aluminum melt for In Situ synthesis of Al Al2O3 composite For thispurpose activated aluminum zinc oxide Powder mixture was combined with copper oxide powder and injectedto aluminum melt After finishing of the injection process cast composite slurry was solidified in a highpressure squeeze casting system By the chemical reaction of metallic oxides with aluminum melt in addition tothe formation of alumina particles zinc and copper elements were formed and dissolved in the matrix whichresulted to synthesis of alloyed matrix In order to detection of the ignition temperature of aluminothermyreaction of zinc oxide and copper oxide in activated powder samples and multi powder mixture in comparisonwith the similar quantity in non activated samples differential thermal analysis DTA technique was employed The result showed the considerable reduction for ignition temperature of aluminothermy reaction in activatedand multi powder mixture samples Effective parameters in casting process of composite materials weredetermined through obtained results from phase analysis of slag and chemical analysis of primary samples Inorder to evaluation of size and dispersion of alumina particles scanning electron microscopy was employed Scanning electron microscopy micrographs showed the more appropriate dispersion and bigger size of aluminaparticles obtained from reaction of aluminum with multi powder mixture in comparison with those particlesobtained from reaction of zinc oxide solely In order to mechanical properties evaluation of composite samples a corresponding monolithic sample with similar chemical composition related to each composite sample wasfabricated and hardness compression and tensile tests were applied to both monolithic and composites samples Comparative results revealed the higher tensile and compression strength and lower elongation for compositesamples in comparison with monolithic samples Key Words Metal Matrix Composite In Situ Aluminothermy reaction Squeeze Casting Microstructure
استاد راهنما :
محمود مرآتيان
استاد مشاور :
مسعود پنجه پور
استاد داور :
محمد حسين فتحي، مسعود امامي
