توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Employing friction stir processing technique for fabricating steel\TiC nano–composite surface layer on carbon steel
اطلاعات انتشار: اولین همایش بین المللی و ششمین همایش مشترک انجمن مهندسی متالورژی ایران، سال
تعداد صفحات: ۵
In this study, the almost new processing technique, friction stir processing (FSP) was employed to produce nano–composite surface layers on mild steel. Nano–sized TiC particulates were introduced to the stir zone by means of apre–made groove. A tungsten carbide tool was used to plasticize the mild steel substrate. SP parameters such as tool rotation and substrate advancing speeds were adjusted to mix TiC particles with the plasticize matrix. Composite surface layers were formed containing clusters of TiC. Increasing the ratio of tool rotation to substrate advancing speed resulted in breakdown of TiC clusters. A TiC\steel nano–composite surface layer with uniform dispersion of nano–sized TiC powder was achieved using a tool rotation and substrate advancing speed of 1120 rpm and 31.5 mm\s, respectively. The nanocomposite surface layer exhibited a micro hardness value about three times more than that of the as–received mild steel; this is attributed to the presence of hard TiC ceramic reinforcements in a matrix of refined acicular–type ferrite.<\div>

۲Influence of polyaniline nanoparticles on the corrosion protection properties of epoxy nanocomposite coating
اطلاعات انتشار: دومین همایش ملی پژوهش های کاربردی در علوم شیمی، زیست شناسی و زمین شناسی، سال
تعداد صفحات: ۸
In this study the anticorrosive properties of an epoxy coating loaded with polyaniline nanoparticles is investigated by means of Electrochemical Impedance Spectroscopy (EIS) and accelerated salt spray test. The blank epoxy coating was loaded with 0.1 wt % PAni nanoparticles. Through the monitoring of open circuit potential, an ennoblement effect was detected for the systems in the presence of a 3.5 wt.% NaCl solution. Also, an increase in the impedance at low frequency range was occurred by adding polyaniline nanoparticles. The OCP and EIS results indicate that possibly a passive layer formed on the substrate surface. In addition the coating with polyaniline nanoparticles had better performance to salt spray media.<\div>
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