Superior electrical contact characteristics of Ag/CNT composite films formed in a cyanide-free plating bath and tested against corrosion by H2S gas

TiC particles/Ag composite films were successfully prepared through co-electrodeposition, using the Ag plating solutions with minor addition of TiC particles, followed by heat treatment in vacuum. The X-ray diffractometer (XRD), scanning electron microscope (SEM), nanoindentation tester and four-point probes were used to characterize phase composition, morphologies, mechanical properties and electrical properties of as-fabricated films, respectively. Experimental results show that only TiC and Ag phases are identified for the TiC particles/Ag composite films. TiC particles are incorporated tightly and evenly on the surface of the composite films without obvious agglomeration. TiC particles/Ag composite films maintain good electrical conductivity. Meanwhile, compared to pure silver film without the addition of TiC particles, the indentation hardness ([Formula: see text]) of the TiC/Ag composite film electrodeposited from the plating bath containing 6[Formula: see text]g/L of TiC particles can be improved from 600 [Formula: see text] to 11,000 [Formula: see text].

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Characterization of NiBP-graphite composite coatings deposited by dynamic chemical plating

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-11-2013-1320 ◽

2015 ◽

Vol 62 (2) ◽

pp. 116-122 ◽

Cited By ~ 4

Author(s):

Hamid Omidvar ◽

Mohammad Sajjadnejad ◽

Guy Stremsdoerfer ◽

Yunny Meas ◽

Ali Mozafari

Keyword(s):

Corrosion Resistance ◽

Metal Salt ◽

Composite Coatings ◽

Composite Films ◽

Nanocomposite Films ◽

Wear Properties ◽

Plating Bath ◽

Graphite Composite ◽

Content Type ◽

Chemical Plating

Purpose – This paper aims to coat ternary composite NiBP-graphite films by Dynamic Chemical Plating “DCP” technique with a growth rate of at least 5 μm/h, which makes this technique a worthy candidate for production of composite films. Electroless nickel plating method can be used to deposit nickel–phosphorous and nickel–boron coatings on metals or plastic surface. However, restrictions such as toxicity, short lifetime of the plating-bath and limited plating rate have limited applications of conventional electroless processes. Design/methodology/approach – DCP is an alternative for producing metallic deposits on non-conductive materials and can be considered as a modified electroless coating process. Using a double-nozzle gun, two different solutions containing the precursors are sprayed simultaneously and separately onto the surface. With this technique, NiBP-graphite films are fabricated and their corrosion and tribological properties are investigated. Findings – With a film thickness of 2 μm, tribological analysis confirms that these coatings have favorable anti-friction and anti-wear properties. Corrosion resistance of NiBP-graphite composite films was investigated, and it was found that graphite incorporation significantly enhances corrosion resistance of NiBP films. Originality/value – DCP is faster and simpler to perform compared to other electroless deposition techniques. Using a double-nozzle gun, metal salt solution and reducing agents are sprayed to the surface, forming a deposit. Previously, coatings such as Cu, Cu-graphite, Cu-PTFE, Ni-B-TiO2, Ni-P, Ni-B-P and Ni-B-Zn with favorable compactness and adherence by DCP were reported. In this paper, the authors report the application of the DCP technique for depositing NiBP-PTFE nanocomposite films.

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Analysis of electroless nickel thin films

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100086854 ◽

1991 ◽

Vol 49 ◽

pp. 510-511 ◽

Cited By ~ 1

Author(s):

C. W. Price ◽

E. F. Lindsey

Keyword(s):

Thin Films ◽

Inertial Confinement Fusion ◽

Electroless Nickel ◽

Inertial Confinement ◽

Plating Bath ◽

X Ray ◽

Nickel Thin Films ◽

Nickel Deposits ◽

Confinement Fusion ◽

Thickness Measurements

Thickness measurements of thin films are performed by both energy-dispersive x-ray spectroscopy (EDS) and x-ray fluorescence (XRF). XRF can measure thicker films than EDS, and XRF measurements also have somewhat greater precision than EDS measurements. However, small components with curved or irregular shapes that are used for various applications in the the Inertial Confinement Fusion program at LLNL present geometrical problems that are not conducive to XRF analyses but may have only a minimal effect on EDS analyses. This work describes the development of an EDS technique to measure the thickness of electroless nickel deposits on gold substrates. Although elaborate correction techniques have been developed for thin-film measurements by x-ray analysis, the thickness of electroless nickel films can be dependent on the plating bath used. Therefore, standard calibration curves were established by correlating EDS data with thickness measurements that were obtained by contact profilometry.

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Epitaxial ferroelectric thin films

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100170591 ◽

1994 ◽

Vol 52 ◽

pp. 572-573

Author(s):

S. G. Ghonge ◽

E. Goo ◽

R. Ramesh ◽

R. Haakenaasen ◽

D. K. Fork

Keyword(s):

Single Crystal ◽

Work Function ◽

Nonvolatile Memory ◽

Ferroelectric Properties ◽

Electrical Contact ◽

Memory Devices ◽

Ferroelectric Films ◽

Si Substrates ◽

Electro Optic ◽

Wide Range

Microstructure of epitaxial ferroelectric/conductive oxide heterostructures on LaAIO3(LAO) and Si substrates have been studied by conventional and high resolution transmission electron microscopy. The epitaxial films have a wide range of potential applications in areas such as non-volatile memory devices, electro-optic devices and pyroelectric detectors. For applications such as electro-optic devices the films must be single crystal and for applications such as nonvolatile memory devices and pyroelectric devices single crystal films will enhance the performance of the devices. The ferroelectric films studied are Pb(Zr0.2Ti0.8)O3(PLZT), PbTiO3(PT), BiTiO3(BT) and Pb0.9La0.1(Zr0.2Ti0.8)0.975O3(PLZT).Electrical contact to ferroelectric films is commonly made with metals such as Pt. Metals generally have a large difference in work function compared to the work function of the ferroelectric oxides. This results in a Schottky barrier at the interface and the interfacial space charge is believed to responsible for domain pinning and degradation in the ferroelectric properties resulting in phenomenon such as fatigue.

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Ultrahigh Energy Storage Performances of Polymer-based Nanocomposite via Interfaces Engneering

Journal of Materials Chemistry A ◽

10.1039/d0ta10044g ◽

2020 ◽

Author(s):

Peng Wang ◽

Zhongbin Pan ◽

Weilin Wang ◽

Jianxu Hu ◽

Jinjun Liu ◽

...

Keyword(s):

Dielectric Constant ◽

Energy Storage ◽

High Performance ◽

Breakdown Strength ◽

Composite Films ◽

Power Electronic ◽

Ultrahigh Energy

High-performance electrostatic capacitors are in urgent demand owing to the rapidly development of advanced power electronic applications. However, polymer-based composite films with both high breakdown strength (Eb) and dielectric constant...

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