نتایج جستجو برای: "Pulse current"
تعداد نتایج: 858187 فیلتر نتایج به سال:
In this research, optimization of the pulsed gas tungsten arc welding including pulse current, background current, pulse frequency and on time were investigated in welding of non-similar materials of austenitic stainless steel AISI 316L and nickel-base super alloy of Monel 400 by using ERNiCr3 filler metal. In order to obtain optimum conditions of welding the Taguchi method with the L9 array wa...
The increase in the number of pulses in multipulse rectifiers leads to a reduction in harmonic current distortion. But this increase in the number of pulses leads to an increase in kVA, cost, and complexity of the multi-pulse rectifiers. As a result, in industrial applications, 12-pulse rectifiers are mainly used due to their lightweight, simple transformers, and low kVA rate, and low cost. The...
Zinc-Nickel electrodeposits have been widely adopted for surface treatment of automobile steel sheet for high corrosion resistance. In this work the effect of pulse parameters on the Zn-Ni alloy electrodeposits was investigated. The hardness, thickness, corrosion resistance and composition of deposits thus produced were investigated. The surface topography of the deposits was also observed in S...
The purpose of this study was to optimize the thickness of anodizing Aluminum coatings processed under pulse current mode through the Design of Experiments (DOE) method. Thickness measurement, polarization and electrochemical impedance spectroscopy were employed to take Thickness and corrosion behaviors of the anodized coatings into consideration. Also, Field-emission scanning electron microsco...
zinc-nickel electrodeposits have been widely adopted for surface treatment of automobile steel sheet for high corrosion resistance. in this work the effect of pulse parameters on the zn-ni alloy electrodeposits was investigated. the hardness, thickness, corrosion resistance and composition of deposits thus produced were investigated. the surface topography of the deposits was also observed in s...
comparison of the effects of two substrates and additives on pulse current electrodeposition of au nanoparticles showed that using indium-tin oxide instead of cu and cysteine instead of potassium iodide can improve morphology, current efficiency, photocatalytic effect and increase the number of nanocrystals. the examinations using the field-emission scanning-electron-microscope (fe-sem) showed ...
Zinc-Nickel electrodeposits have been widely adopted for surface treatment of automobile steel sheet for high corrosion resistance. In this work the effect of pulse parameters on the Zn-Ni alloy electrodeposits was investigated. The hardness, thickness, corrosion resistance and composition of deposits thus produced were investigated. The surface topography of the deposits was also observed in S...
تراشه های الکترونیکی کاشته شده در بدن در کاربردهای مختلفی مورد استفاده قرار میگیرند، از جمله برای فهم ساختار و عملکرد عصب ها، برای تولید پروتزهای چشمی که بینایی را به افراد نابینا برمی گرداند، برای تحریک اعصاب ماهیچه هایی که قدرت تحرک را از دست داده اند و ... از این تراشه ها استفاده می شود. مدارهای به کار رفته در این تراشه ها باید مصرف توان کم، اندازه کوچک و قابلیت اطمینان زیادی داشته باشند. ا...
in this work, the influence of different edm parameters (pulse current, pulse voltage, pulse on-time , pulse off-time) in finishing stage on the surface roughness (r a ) as a result of application copper electrode to a workpiece( cold work steel din1.2379) has been investigated. design of the experiment was chosen as full factorial. statistical analysis has been done and artificial neural n...
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