Abbas Kianvash
Department of Materials Engineering, University of Tabriz, Tabriz, Iran
[ 1 ] - Flexible Radar Absorbing Nanocomposites Based on Co-ferrite/Nano Carbon/polymeric epoxy resin
In this research work cobalt-ferrite (CoFe2O4) nanoparticles were synthesized by a simple, general sol-gel auto-combustion method. For this study, electromagnetic (EM) wave absorbing coatings with different weight fractions of nano-carbon and CoFe2O4 (which, arises from both dielectric and magnetic contributions) and polymeric epoxy resin were prepared and their characteristics were fully inves...
[ 2 ] - بهینه سازی انطباق امواج الکترومغناطیسی کامپوزیت آهن کربونیل – La0/8Sr0/2MnO3 در جذب امواج میکروویو
در این پژوهش نخست نانو ذرات (LSMO) La0/8Sr0/2MnO3 به روش سل ژل سنتز شدند. سپس درصد جذب امواج میکروویو رنگ‌های جاذب شامل نسبت‌های مختلف پرکننده‌های آهن کربونیل –LSMO بصورت 80-0، 79-1، 77-3، 74-6، 72-8 و 20% وزنی چسب پلی استر و سخت کننده در گستره فرکانسی 8 –GHz 12 مورد بررسی قرار گرفت. مواد کامپوزیتی با ضخامت‌های مختلف 7/0، 9/0 و mm1/1 به صورت رنگ بر روی یک زیر لایه آلومینیومی به ابعاد استاندار...
[ 3 ] - رفتار جذب امواج الکترومغناطیس در باند X در فریت باریم آلاییده شده با Mn و Zr
In this research, M-type Mn-Zr doped Ba-ferrites powders with a general chemical composition of BaFe10.6(ZrxMn1-x)O19 ( x= 0, 0.2, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1) were synthesized and prepared by a solid state method, and were then mixed with anAraldite + hardner and processed into polymer matrix composite specimens. Phase analyses of synthesized samples wereperformed by an XRD technique and ...
[ 4 ] - Parametric Optimization of Electro Spark Microwelding of Aluminum Clad Steel (RESEARCH NOTE)
The feasibility and parameters optimization of AA5183 aluminum cladding on AISI 1018 steel by electro spark microwelding (ESM) and the corrosion resistance of the clad plate were investigated. The optimum conditions were found as 15 A, 10%, 800 Hz and 2500 rpm for P, D, F and R factors, respectively. Confirmation test under optimum conditions showed that the model can be effectively used to pre...
[ 5 ] - Effect of Post-Sintering Annealing Treatment on Magnetic Properties of Some Nd Fe b Based Magnets
Effects of post-sintering annealing treatment between 300 and 1000ºC for up to 8 hrs time periods followed by either furnace cooling (FC) or air-cooling (AC) on the hard magnetic properties of some Nd-Fe-B based sintered magnets was investigated. It was shown that the intrinsic coercivity (Hci), second quadrant demagnetization loop shape and thus the energy density (BH)max varied considerably a...
[ 6 ] - The Effects of ZrO2 or Tic on the Performance of the Alumina-Based Ceramic Cutting Tools
Two types of alumina-based cutting tools with compositions of 90 vol.% Al2O3+10 vol.% ZrO2 and 80 vol.% A12O3+20 vol.% TiC are produced by isostatic pressing and sintering technique. The effects of these additives on the mechanical properties and cutting performance of these materials are investigated. The tool life in both materials is examined under identical conditions on cutting a grey cast...
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