پديد آورنده :
صادقي، زهرا
عنوان :
توليد فرم فلزي پايه منيزيمي به روش ريخته گري و بررسي عوامل موثر بر پارامترهاي كيفي آن
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
دوازده،89ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
محمود مرآتيان، غلامرضا آريانپور
استاد مشاور :
مسعود پنجه پور
توصيفگر ها :
روش گازار , تجزيه حرارتي , الياف ويسكوزريون , الياف پلي پروپيلن , تخلخل
تاريخ نمايه سازي :
11/9/92
استاد داور :
مهدي احمديان، علي مالكي
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Production of Magnesium base foams by casting route and study of effective factors on quality parameters Zahra Sadeghi Email address z sadeghi@ma iut ac ir Date of Submission on May 5 2013 Department of Materials Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisors Mahmood Meratian Associate Professor Meratian@cc iut ac ir Gholam Reza Aryanpour Assistant Professor Aryanmat@cc iut ac irAbstractNowadays metal foams have attracted much attention because of their unusual combination ofphysical and mechanical properties There are various methods to produce these structures TheGasar method is much better than the traditional techniques in terms of effective porosity control pore size and orientation The particular condition of this method and its expensive productionprocess are the limitations which the material engineers confront to them For these reasons recently several researches have been developed a new fabrication technique using a thermaldecomposition method in order to produce foams characterized by Gasar structures which made ofdifferent metals In this study according to magnesium potential applications in differentindustries fabrication the lotus type porous magnesium at atmospheric pressure using the thermaldecomposition of two types of polymers called Viscous Rayon and Polypropylene with C6H10O5and C3H6 molecular formulas respectively examined In this method the Hydrogen which isproduced by thermal decomposition of polymer foam causing agent dissolved in Magnesium andformation of pores The CELEMEX software was applied to determine the effect of foam causingfactor on the structure of foam including amount of porosity and pore diameter X ray diffraction thermal analysis and infrared spectroscopy are used to analysis the gas which achieved fromdecomposition of factors causing foam in argon atmosphere This is the way of identify foamcausing agent according to productions due to decomposition of that with temperature increasing With increasing amount of foam causing agent the porosity increases to a maximum but then didnot change because of the solubility of hydrogen from a certain amount is constant The averagepore diameter is almost constant and not varied so much Respectively the highest porosity createdthrough Viscous Rayon and Polypropylene fibers has been about 52 and 23 The maximumporosity achieved from the Viscous Rayon fibers because of formation of a viscous slag on thesurface of molten Formation of slag increased the partial pressure of the gas in the molten metal Consequently the gas solubility increase thus it will be possible to build structures with higherporosity But in manufacturing process using Polypropylene fibers due to the lack of slagformation on the surface molten there are not any factors to prevent gas escaping and the amountof porosity will be decreased Therefore it has been concluded that the foam manufacturingprocess through Viscous Rayon fibers provides extra porosity compared with the foammanufacturing process using Polypropylene fibers Keywords Magnesium foam Gasar method Thermal decomposition Viscous Rayon fiber Polypropylenefiber porosity
استاد راهنما :
محمود مرآتيان، غلامرضا آريانپور
استاد مشاور :
مسعود پنجه پور
استاد داور :
مهدي احمديان، علي مالكي
