حسین آقاجانی
دانشگاه تبریز
[ 1 ] - پوششدهی نانوذرات کاربید سیلیسیم (SiC) بر روی کامپوزیت کربن ـ کربن به روش رسوبدهی الکتروفورتیک (EPD)
هدف از این پژوهش بررسی پایداری نانوذرات SiC بهمنظور پوششدهی بر روی کامپوزیت کربن ـ کربن به روش EPD میباشد. بدین منظور سوسپانسیونهایی در حلالهای مختلف و در حضور پراکندهساز PEI تهیه شدند. پایداری سوسپانسیونها توسط تصاویر ماکروسکوپی تهیه شده از آنها پس از گذشت 24 ساعت و اندازهگیری پتانسیل زتا و توزیع اندازه ذرات مورد بررسی قرارگرفت. در ادامه پوشش مورد نظر از سوسپانسیون بهینه بر روی زیر...
[ 2 ] - بررسی تاثیر پارامترهای مختلف بر سینتیک رسوبدهی پوشش SiC اعمال شده به روش CVD بر روی کامپوزیت کربن - کربن
در این پژوهش پس از اعمال پوشش SiC به روش رسوبدهی شیمیایی فاز بخار (CVD) بر روی کامپوزیت کربن-کربن، به بررسی تاثیر پارامترهای مختلف بر سینتیک رسوبدهی پرداخته شده است. بهمنظور بررسی فازی پوشش SiC از آنالیز XRD، ریز ساختار کامپوزیت کربن-کربن قبل و پس از اعمال پوشش SiC از آنالیز SEM و بررسی فرآوردههای جانبی فرآیند از آنالیز EDS استفاده شده است. بر این اساس تاثیر پارامترهای دما، ترکیب گاز ورودی،...
[ 5 ] - Kinetics analysis of electrophoretic deposition using small signal and large signal modeling, Case study: Nano-Mullite suspension
Having sufficient and accurate understanding about kinetics of phenomena, could be an important reason for further technological progresses. Finding a white-box mathematical model for weight vs. time curves of Electrophoretic Deposition (EPD) using large and small signal analysis has been studied thoroughly in the present investigation. Weight-Time curves of nano-Mullite suspension have been tr...
[ 6 ] - Electrophoretic deposition and corrosion behavior study of aluminum coating on AZ91D substrate
Aluminum coating was prepared on AZ91D magnesium alloy substrate using the electrophoretic deposition (EPD) method in absolute ethanol solvent. In order to determine the optimal concentration of AlCl3.6H2O additive, the zeta potential and size of particles in the suspension were measured in the presence of different concentrations of AlCl3.6H2O. The results showed that an appropriate coating is...
[ 7 ] - بررسی تأثیر تزریق آلومینیم در کریستالیزاتور بر نوع، ترکیب و اکتیویته آخالها در فولاد کمکربن
This study was intended to investigate the effect of injection of aluminium into the crystallizator on type, composition and activity of inclusions in low carbon steel grade USD7. The steel is made in Zob-e-Ahan Isfahan factory and its porosities and inclusions results in the problem of rupturing during rolling process. To improve the quality of this steel, 2.4 mm diameter pure aluminum wires w...
[ 8 ] - A study of oxidation behavior of AZ91D alloy with YSZ coating using EIS
Oxidation behavior of AZ91D magnesium alloy with 3YSZ coating and aluminum interlayer was studied in air at 250 °C using electrochemical impedance spectroscopy EIS, scanning electron microscopy SEM, and X-ray diffraction XRD. The oxidation process was carried out in various duration times from 1 to 10 h. A three-electrode electrochemical cell was employed for all the EIS measurements. Also, to ...
[ 9 ] - Corrosion Resistance Enhancement of AZ91 Magnesium Alloy Using Ni-P Interlayer and Electrophoretic Deposited 3YSZ Coating
The zirconia stabilized by 3mol % Y2O3 (3YSZ) was applied onto the surface of the magnesium alloy AZ91D using electrophoretic deposition (EPD) from a non- aqueous solution. A Ni-P interlayer between the substrate and YSZ coating was also prepared by electroless plating. Finally, coatings were heat treated in control atmosphere at 400 °C. The preparation, microstructure and corrosion resistance ...
[ 10 ] - 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...
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