پديد آورنده :
عباسي پور، بنيامين
عنوان :
توسعه نانو كامپوزيت هاي ريختگي A356-CNT با تزريق پودرهاي كامپوزيتي Al-Ni-P-CNT به درون مذاب
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
مهندسي مواد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
يازده،179ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
بهزاد نيرومند، سيد محمود منير واقفي
توصيفگر ها :
الكترولس Ni-P , ريخته گري گردابي , كامپوكست , ريز ساختار , خواص مكانيكي , استحكام كششي در دماي بالا , هدايت الكتريكي
تاريخ نمايه سازي :
6/2/90
استاد داور :
مهدي احمديان، رحمت ا... عمادي
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Development of A356 CNT cast nano composites by injection of Al Ni P CNT composite powders into the melt Benyamin Abbasipour b abbasipour@ma iut ac ir 27th October 2010 Department of Materials Engineering Isfahan University of Technology 84156 83111 Isfahan Iran Degree M Sc Language FarsiDr Behzad Niroumand Assoc Prof Supervisor E mail behzn@cc iut ac irDr Sayed Mahmoud Monir Vaghefi Assoc Prof Supervisor E mail vagh mah@cc iut ac irAbstractProduction of high strength metal matrix nano composite reinforced by CNT has been thebase of many researches in the field of material engineering In the present work A356 CNT cast nano composites were produced by stir casting and compocasting techniques CNTs were injected into the melt in two different forms of raw CNT or Al Ni P CNTcomposite powders The composite powders were produced by Ni P electroless platingtechnique The effects of CNT addition and casting method on the microstructural mechanical and electrical properties of the produced nano composites were investigated Bath temperature of 80 C bath pH of 5 5 CNT concentration of 1 25g lit Al particles toCNT ratio of 6 and stirring speed of 500 rpm were recognized as the optimum Ni Pelectroless plating parameters for production of Al Ni P CNT composite powders Theresults revealed that addition of CNTs in the form of composite powders decreased thegrain size of the matrix alloy For the composites cast from the fully liquid state thesecondary dendrite arm spacing was decreased by about 60 and for the semi solid castsamples the average equivalent circle diameter of Al particles was decreased by about27 when the CNTs were added by injection of Al Ni P CNT composite powders intothe melt As a result hardness wear resistance and tensile properties of the compositeswere increased Elastic modulus yield strength and ultimate tensile strength of thecomposites produced by injection of composite powders was significantly improvedcompared with the matrix alloy or the composite produced by injection of untreated CNT While the un reinforced alloy kept less than 70 of its strength at 300 C the semi solidcomposites samples kept more than 90 of their strength at this temperature Thebending strength of the composite samples was increased by about 30 compared to thatof the corresponding monolithic samples Electrical conductivity of all composite sampleswas decreased by addition of CNT compared to that of monolithic samples Keywords A356 CNT nano composite Ni P electroless plating Composite powder Stircasting Compocasting Microstructure Mechanical properties High temperature tensilestrength Electrical conductivity
استاد راهنما :
بهزاد نيرومند، سيد محمود منير واقفي
استاد داور :
مهدي احمديان، رحمت ا... عمادي
