Characterization of gold layers selectively plated by a pulsed current

1989 ◽  
Vol 169 (1) ◽  
pp. 105-115 ◽  
Author(s):  
Gerhard Franz
Keyword(s):  
Pulsed Current

Characterization of Solid Tin Target for Gas Discharges Produced EUV Plasmas

2007 ◽  
Vol 121-123 ◽  
pp. 885-888
Author(s):  
C.H. Zhang ◽  
S. Katsuki ◽  
J.G. Shi ◽  
H. Horita ◽  
T. Namihira ◽  
...  
Keyword(s):  
Electric Energy ◽  
Target Material ◽  
Pulsed Current ◽  
Gas Discharges ◽  
Pinch Plasma ◽  
Euv Emission ◽  
Pinhole Imaging ◽  
Background Gas ◽  
Z Pinch

In the development of our Z-pinch plasma EUV source, xenon (Xe) is used for the background gas discharges, and a solid tin (Sn) rod is used as target material due to its potential of high convention efficiency (CE) from input electric energy to EUV radiation [1, 2]. The Z-pinch plasma was driven by pulsed current with amplitude of 30 kA and pulse duration of 110 ns. Pinhole imaging, EUV spectrograph and in-band EUV energy monitor were used to characterize the EUV emission from the Z-pinch discharge. The experimental analyses have demonstrated the CE was as high as 3% [3].

NiMo Nanoparticles Electrodeposited by Pulsed Current and Their Catalytic Properties for Hydrogen Production

2013 ◽  
Vol 16 (3) ◽  
pp. 177-182 ◽  
Author(s):  
Savidra Lucatero ◽  
Gabriel Tamayo ◽  
Diego Crespo ◽  
Ernesto Mariño ◽  
Marcelo Videa
Keyword(s):  
Pulse Current ◽  
Catalytic Properties ◽  
Unit Area ◽  
Catalytic Performance ◽  
Pulsed Current ◽  
Pulse Time ◽  
Current Pulses ◽  
Mo Content ◽  
High Instability

The electrocatalytic activity of NiMo nanoparticles (NPs) fabricated by means of current pulses from a binary electrolyte was characterized using cyclic voltammetry. The pulse current density, jpulse, was varied in the range of 7 to 430 mA/cm2, whereas the pulse time, tpulse, was kept constant at two seconds. Mean NP size, Dmean, ranged within 27 and 38 nm at jpulse values between 15 and 140 mA/cm2; with Dmean increasing as jpulse was higher. NP dispersion (i. e., number of objects per unit area of substrate) was lower when jpulse values were also low (15 and 35 mA/cm2), which showed consistency with a promoted nuclei formation and prolonged NP growth at higher jpulse values. An improved catalytic performance for hydrogen evolution was determined upon increasing jpulse in the range of 7 to 70 mA/cm2 and remaining practically unvaried at higher jpulse values. The electrosynthesis of two distinct catalytic materials was indicated by electrochemical characterization of deposits; the material with greatest catalytic activity also showed high instability, causing a dramatic decay (~80%) in the activity after two consecutive cycles of operation. Ni and Mo content in electrodeposits were both sensitive to variations in jpulse.

Characterization of microstructure and mechanical properties of continuous and pulsed current gas tungsten arc welded superaustenitic stainless steel

2015 ◽  
Vol 30 (10) ◽  
pp. 1727-1746 ◽  
Author(s):  
K. Devendranath Ramkumar ◽  
Ayush Choudhary ◽  
Shivang Aggarwal ◽  
Anubhav Srivastava ◽  
Tadikonda Harsha Mohan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Pulsed Current ◽  
Superaustenitic Stainless Steel ◽  
Gas Tungsten Arc ◽  
Microstructure And Mechanical Properties ◽  
Gas Tungsten ◽  
Image Position

Abstract

Structural characterization of electrodeposited nanophase Ni–Cu alloys

2006 ◽  
Vol 21 (1) ◽  
pp. 45-61 ◽  
Author(s):  
S.K. Ghosh ◽  
A.K. Grover ◽  
G.K. Dey ◽  
U.D. Kulkarni ◽  
R.O. Dusane ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Phase Separation ◽  
Growth Direction ◽  
Pulsed Current ◽  
Modulated Structure ◽  
Cu Alloys ◽  
Transmission Electron ◽  
Deposition Techniques

An investigation of Ni–Cu alloys electrodeposited from aqueous bath, using bothdirect current (dc) and pulsed current (pc) deposition techniques, has revealed many interesting features: A modulated structure with typical layer thickness of 90 and75 nm of copper-rich and nickel-rich layers, respectively, is formed in dc plating. A surprising observation was that the modulation direction was parallel to the substrate, unlike in the case of artificial multilayers wherein it is along the growth direction. No such compositional modulations were observed in pc-plating in the present work. Spinodal phase separation, accompanied by L10 ordering, was found to have occurred in the as deposited samples in both the cases. The size of the deposited crystals in both the cases has been found to be in the range of 2.5–30 nm. Detailed high-resolution transmission electron microscopy has shown that the atomic arrangements are nearly perfect right upto the boundaries of the nanosized grains.

scholarly journals CERAMIC PROCESSING ROUTE AND CHARACTERIZATION OF A NI-ZN FERRITE FOR APPLICATION IN A PULSED-CURRENT MONITOR

2009 ◽  
Vol 91 ◽  
pp. 303-318 ◽  
Author(s):  
Vera Lucia Othero de Brito ◽  
Antonio Carlos da Cunha Migliano ◽  
L. V. Lemos ◽  
F. C. L. Melo
Keyword(s):  
Processing Route ◽  
Pulsed Current ◽  
Ceramic Processing ◽  
Zn Ferrite
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