Effect of electroless nickel interlayer on the electrochemical behavior of single layer CrN, TiN, TiAlN coatings and nanolayered TiAlN/CrN multilayer coatings prepared by reactive dc magnetron sputtering

2006 ◽  
Vol 51 (17) ◽  
pp. 3461-3468 ◽  
Author(s):  
V.K. William Grips ◽  
V. Ezhil Selvi ◽  
Harish C. Barshilia ◽  
K.S. Rajam
Keyword(s):  
Magnetron Sputtering ◽  
Electrochemical Behavior ◽  
Single Layer ◽  
Electroless Nickel ◽  
Multilayer Coatings ◽  
Dc Magnetron Sputtering

Multilayer Coatings for Focusing Hard X-ray Telescopes

1998 ◽  
Vol 551 ◽  
Author(s):  
A. Ivan ◽  
R. Bruni ◽  
K. Byun ◽  
J. Everett ◽  
P. Gorenstein ◽  
...  
Keyword(s):  
Thin Film ◽  
Magnetron Sputtering ◽  
Single Layer ◽  
Multilayer Coatings ◽  
Dc Magnetron Sputtering ◽  
Film Properties ◽  
Auger Analysis ◽  
Cross Sectional ◽  
X Ray ◽  
Specular Reflectivity

AbstractSeveral multilayer test coatings for hard X-ray telescopes were fabricated using DC magnetron sputtering. The process parameters were selected from a series of trials of single layer depositions. The samples were characterized using X-ray specular reflectivity scans, AFM, and cross-sectional TEM. Additional measurements (stylus profilometry, RBS, and Auger analysis) were used in the optimization of the deposition rate and of the thin film properties (density, composition, surface/interface microroughness). The X-ray reflectivity scans showed that the combinations of reflector and spacer materials tested so far (W/Si and W/C) are suited for graded d-spacing multilayer coatings that present a constant reflectivity bandpass up to 70 keV.

Electroless Multilayer Coatings Used in the Protection of Thermosyphon Economizer from Corrosion

2012 ◽  
Vol 512-515 ◽  
pp. 1607-1610
Author(s):  
Yang Xu ◽  
Yong Zou ◽  
Tao Luan
Keyword(s):  
Corrosion Resistance ◽  
Single Layer ◽  
Electroless Nickel ◽  
Corrosion Current ◽  
Multilayer Coatings ◽  
Electrochemical Tests ◽  
Exhaust Temperature ◽  
Electroless Copper ◽  
Save Energy ◽  
Better Than

Economizers are widely employed in the boiler system to increase efficiency and save energy. However one prominent problem is the severe corrosion of economizer due to the decrease of the exhaust temperature of boiler. Ni–P/Cu/Ni-P multilayer coatings, which could effectively improve the corrosion resistance of the facilities in economizer, are introduced in the present work. The three-layer coatings, whose composition is Ni–P/Cu/Ni-P from substrate to surface, were prepared using dual baths (acidic hypophosphite-reduced electroless nickel bath and acidic replacement electroless copper bath). The corrosion resistance of the coatings was evaluated by porosity and electrochemical tests. The results of porosity evaluation show that all the multilayer coatings performed better than the single-layer coatings of similar thickness. Similarly, The electrochemical tests showed lower corrosion current density for the multilayer coatings in 3.5 wt.% NaCl aqueous solutions.

Nanolayered multilayer coatings of CrN/CrAlN prepared by reactive DC magnetron sputtering

2007 ◽  
Vol 253 (11) ◽  
pp. 5076-5083 ◽  
Author(s):  
Harish C. Barshilia ◽  
B. Deepthi ◽  
N. Selvakumar ◽  
Anjana Jain ◽  
K.S. Rajam
Keyword(s):  
Magnetron Sputtering ◽  
Multilayer Coatings ◽  
Dc Magnetron Sputtering

scholarly journals On the Microstructure and Mechanical Properties of CrNx/Ag Multilayer Films Prepared by Magnetron Sputtering

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1316
Author(s):  
Chunfu Hong ◽  
Ping He ◽  
Jun Tian ◽  
Fa Chang ◽  
Jianbo Wu ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Layer Thickness ◽  
Film Surface ◽  
Single Layer ◽  
Friction Reduction ◽  
Multilayer Coatings ◽  
X Ray Diffraction ◽  
Wear Performance ◽  
Transmission Electron ◽  
Nano Grains

CrNx/Ag multilayer coatings and a comparative CrNx single layer were deposited via reactive magnetron sputtering. In multilayer coatings, the thickness of each CrNx layer was constant at 60 nm, while that of the Ag layer was adjusted from 3 to 10 nm. Microstructure of the films was characterized by X-ray diffraction and transmission electron spectroscopy. The results suggest that the film containing 3 nm of Ag layer presents a nanocomposite structure comprising fine nano-grains and quasi-amorphous clusters. With Ag layer thickness reaching 4.5 nm and above, Ag grains coalesce to produce continuous an Ag layer and exhibit (111) preferential crystallization. Hardness of the films was detected by nanoindentation and it reveals that with increasing the Ag layer thickness, the hardness continuously decreases from 30.2 to 11.6 GPa. Wear performance of the films was examined by the ball-on-disk test at 500 °C. The result suggests that the out-diffusion of Ag towards film surface contributes to the friction reduction, while the wear performance of films depends on the thickness of the Ag layer.

Nanoindentation, Nanoscratch and Wear Studies on Nanoscale Multilayer TiN/CrN Coatings

2009 ◽  
Author(s):  
Manohar S. Konchady ◽  
Sergey Yarmolenko ◽  
Devdas M. Pai ◽  
Jag Sankar
Keyword(s):  
Stainless Steel ◽  
Magnetron Sputtering ◽  
Sliding Wear ◽  
Multilayer Coatings ◽  
Maximum Hardness ◽  
Dc Magnetron Sputtering ◽  
Wear Performance ◽  
Steel Substrates ◽  
Hardness Values ◽  
Crn Coatings

In the present study, multilayer TiN/CrN coatings at different bilayer thicknesses have been deposited on silicon (100) and 316 stainless steel substrates using reactive DC magnetron sputtering technique. Nanoindentation, nanoscratch and ball-on-disk tribometer tests were used to characterize the films. Nanoindentation measurements showed enhancement in hardness values for all multilayer coatings with maximum hardness reaching 34 GPa which is about 45% improvement over the rule of mixtures. Nanoscratch tests revealed higher critical loads for multilayer coatings compared to monolayer TiN and CrN coatings. The tribometer tests showed better sliding wear performance for TiN/CrN superlattices.

The Effects of SiO, SiON on IZO Thin Film Deposited by DCMG Method

2007 ◽  
Vol 124-126 ◽  
pp. 455-458
Author(s):  
Seong Hoon Kim ◽  
Han Ki Yoon ◽  
Riichi Murakami
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Magnetron Sputtering ◽  
Oxygen Content ◽  
Glass Substrate ◽  
Single Layer ◽  
Target Type ◽  
Dc Magnetron Sputtering ◽  
Izo Thin Film ◽  
Pet Substrate

The thin films of SiO and SiON were deposited individually by the inclination opposite target type DC magnetron sputtering equipment onto the glass substrate. And it was deposited IZO(In2O3 (90wt.%) + ZnO(10wt.%)) on those films. The effects of SiO and SiON were investigated on properties of IZO thin films. AFM images of IZO thin film included SiON film were shown smoother surfaces than that included SiO film. Multi layers of IZO were shown good properties because it have high transmissivity. Resistivity is in inverse proportion to Mobility. If it deposited SiO and SiON, generate layer of change between two layers(SiO or SiON + Substrate). Layer of change influenced resistance because Oxygen content was more than single layer of IZO. In case of using PET substrate, it influenced stronger than Glass substrate for rigid gas permeable and osmosis.

Sign in / Sign up

Export Citation Format

Share Document