توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Oxidation of Copper on the Electrodeposited Co–Ni Alloy Layers in the Co–Ni\Cu Multilayer
نویسنده(ها): ، ، ،
اطلاعات انتشار: دهمین کنگره ملی خوردگی ایران، سال
تعداد صفحات: ۱۱
In recent years, more attention has been paid on producing ferromagnetic muhilayer by electro deposition (ECD). In this process, metallic muhilayers could be fabricated with acceptable quality and price for magnetic systems such as giant magneto resistance (GMR). It was noticeable that a large amount of oxidation and segregation could be
created due to the difference in the interfacial tension between metallic layers. In the present study. copper surface discharge and oxidation was investigated in the electrodeposited Co–NilCu bilayer system using X–ray photoelectron spectroscopy (XPS). secondary ion mass spectroscopy (SIMS) and atomic force microscopy (AFM). The results indicated the existence of a few monolayers of copper oxide on the sud3ce. attributed to discharge and accumulation of copper atoms on the surface during electrodeposition. This phenomenon was explained by lower interfacial tension of the Cu in comparison with the Co and Ni species. Our results also showed that the surface segregation in electrodeposits was increased due to interface charging and. higher sur:tBce diffusion at applied overpotential The effect of inter:tBce charging on the interfacial tension was confirmed by Lippman model Also. the effect of air exposure on the amount of oxidized copper was related to selective oxidation in the Co–NilCu systems with a higher tendency of copper to surface oxidation. These resuhs confirm that the Cu oxidation is a key parameter in the accumulation during deposition and also during air exposure.<\div>

۲Pt nanowires: Electrodeposition and Properties
نویسنده(ها): ، ، ،
اطلاعات انتشار: سومین کنفرانس نانوساختارها، سال
تعداد صفحات: ۴
Platinum nanowires were prepared by electrodeposition in polycarbonate membrane, with the average nanowire diameter of 30, 50 and 100 nm and the height of 6 μm.Electrodeposition process were analyzed by electrochemical techniques such as voltammetry and chronoamperometry methods. The morphology of Pt nanowires was characterized by scanning electron microscopy (SEM). The electro–oxidation of methanol and hydrogen on this electrode is investigated at room temperature by cyclic voltammetry. The results demonstrated that the Pt nanowire array electrode will have good potential applications in portable power source<\div>

۳investigation on the SSC resistance of the API 5L–X70 weld metals with different amount of acicular ferrite
نویسنده(ها): ، ،
اطلاعات انتشار: کنگره بین المللی جوش و روشهای اتصال، سال
تعداد صفحات: ۶
different amounts of acicular ferrite were constructed in the microstructure of API 5L–X70 submerged arc welds using varous amounts of titanium addition , sulfide stress cracking resistance of these welds was evaluated in hydrogen sulfide environments the results showed that increased acicular ferrite percentage of the weld improves workability of the weld metal in sour medium the internal investigations confirmed that the NACE failure criterion was adequate for detection of the weld cracks bainite and martensite –austenite microconstituents were detrimental for sour service application.<\div>
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