Copper and nickel adherently electroplated on titanium alloy

Anodic treatment of titanium alloy enables electroplating of tightly adherent coatings of copper and nickel on the alloy. The alloy is treated in a solution of hydrofluoric and acetic acids, followed by the electroplating process

Electroplating eliminates gas leakage in brazed areas

Electroplating method seals brazed or welded joints against gas leakage under high pressure. Any conventional electroplating process with many different metal anodes can be used, as well as the build up of layers of different metals to any required thickness

Deemo: a new technology for the fabrication of microstructures

The recent innovations in dry etching make it a promising technology for the fabrications of micromoulds. The high aspect ratios, directional freedom, low roughness, high etch rates and high selectivity with respect to the mask material allow a versatile fabrication process of micromoulds for subsequent electroplating and embossing, as is demonstrated with the DEEMO process. DEEMO is an English acronym and stands for Dry Etching, Electroplating and Moulding

In-situ electrochemical fabrication of natural contacts on single nanowires

We report a template-based in-situ electrochemical method for fabricating natural electric contacts on single nanowires using a pair of cross-patterned electrodes. Such electric contacts are highly stable upon thermal cycling between room temperature and milli-Kelvin temperatures. Direct imaging of the single-nanowire contacts using scanning electron microscopy is also demonstrated.Comment: 13 pages, 4 figure

Study to minimize hydrogen embrittlement of ultrahigh-strength steels

Hydrogen-stress cracking in high-strength steels is influenced by hydrogen content of the material and its hydrogen absorption tendency. Non-embrittling cleaning, pickling, and electroplating processes are being studied. Protection from this hydrogen embrittlement is important to the aerospace and aircraft industries

Synergism of Saccharum officinarum and Ananas comosus extract additives on the quality of electroplated zinc on mild steel.

Synergism of Saccharum officinarum (sugarcane) and Ananas comosus (pineapple) extract additives on the quality of electroplated zinc on mild steel in acid chloride solution was investigated experimentally at ambient temperature (*28 �C). The experiments were performed at different plating times (15 and 18 min), additive concentrations (2, 2.5, 3 ml/50 ml of acid chloride solution), pH 5, temperature (27–30 �C), current (0.08 A), and voltage (13 V DC) conditions. Zinc electroplating on mild steel was performed using a DC-supply. The surface of the plated steel was examined with scanning electron microscopy, and energy dispersive spectroscopy for surface elemental composition analysis. Different surface characteristics were obtained depending upon the concentration of the additive and the plating time. The corrosion resistance of the plated surface was determined by a gravimetric method. Micro-structural morphology of the plated surface indicated a good quality electroplating that was better than either the sugarcane or pineapple extracts alone. The electroplating process was sensitive to changes in additive concentration and plating time. Any variation in the plating parameter produced an entirely new and different surface crystal morphology

Fabrication of Switches on Polymer-Based by Hot Embossing

In MEMS technology, most of the devices are fabricated on glass or silicon substrate. However, this research presents a novel manufacture method that is derived from conventional hot embossing technology to fabricate the electrostatic switches on polymer material. The procedures of fabrication involve the metal deposition, photolithography, electroplating, hot embossing and hot embed techniques. The fundamental concept of the hot embed technology is that the temperature should be increased above Tg of polymer, and the polymer becomes plastic and viscous and could be molded. According to the fundamental concept, the metal layer on the silicon/glass substrate could be embedded into polymer material during the hot embossing process. Afterward, the metal layer is bonded together with the polymer after removing the substrate in the de-embossing step. Finally, the electrostatic switch is fabricated on polymethylmethacrylate(PMMA) material to demonstrate the novel method.Comment: Submitted on behalf of TIMA Editions (http://irevues.inist.fr/tima-editions

Characterization of carbon-nickel thermocouples integrated in textile fabrics

In this paper, the characterization of textile-based thermoelectric generators made of carbon fibers (C) and nickel-coated carbon fibers (Ni) integrated into polyester fabrics is reported. We used carbon yarns inserted into a fabric. The nickel was then deposited by an electrochemical reaction (electroplating) in order to form a series connection of C-Ni thermocouples (105 pairs). The electroplating process was done in such a way that all the hot junctions of the thermocouple chain were on one side of the fabric and all the cold junctions on the other side. A temperature difference across the fabric, which happens in all wearable garments due to the body heat, will then generate a voltage which can be used to power small electronic devices. Here, two electrical characterizations of the thermopile i.e. Seebeck coefficient and internal resistance are presented. All these measurements have been carried out on the C-Ni thermocouple chain formed on carbon yarn in the structure of the polyester fabric. The coefficient turned out to be 1219 μV/K or 11.61 μV/K for a single junction