8501

7882

كارشناسي ارشد

استخراج فلزات

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد

1392

هشت،78ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

مهندسي مواد

ID7882

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Production of nanostructured cermet W Ti C Ni Co by mechanochemical and combustion synthesis methods Vahid Balouchi Mahani v balouchi@ma iut ac ir Date of Submission 10 01 2013 Department of Materials Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Ali Saidi a saidi@cc iut ac ir Mhammad Hasan Abbasi Abbasi32@cc iut ac ir AbstractThe aim of this research was production of W Ti C Ni Co nanostructured cermet Three differentmixtures A B C were prepared Samples in group A W Ti Ni Co C B WC Ti Ni Co C and C NiTi2 W Co C were milled fore 0 60 hrs For samples in group A after 35 hrs milling Ni Co was formed but no carbide phase was detected Further milling up to 60 hrs lead toformation of trace TiC In group B samples TiC was formed after 35 hrs milling In group C after60 hrs W Ti C was formed Heating of samples in group A and C at 1100 0C resulted in sharperXRD patern for TiC and grian size of about 60 nm Heating of group B samples 35 hrs milling at1200 0C reveald formation of W Ti C double carbide Microstructure of pulished samples groupC after heat treatment showed distribution of carbide particles in metalic matrix Microhardness ofsynthesis powders were reduced when W Ti ratio in samples were increased Heat treatment alsoreduced the microhardness to as low as 355 Vickers Keywords Nanocomposite Combustion synthesis Mechanochemical Microhardness

علي سعيدي، محمد حسن عباسي

مريم كرباسي

فتح اله كريم زاده، حميدرضا سليمي جزي