Electroless
Mostrando 1-12 de 24 artigos, teses e dissertações.
-
1. Morphology Behavior of Copper Films Deposited after Wet Surface Treatment on Polished Alumina
In this paper, a pre-treatment process for electroless copper (Cu) deposition on the polished alumina (Al2O3) 99.9% and the behavior of Cu plating by electroless process after Al2O3 surface treatment were explored. Our work was carried out by changing the roughness of Al2O3 through micro-etching (coarsening), nucleation its surface by a two-step method (sens
Journal of the Brazilian Chemical Society. Publicado em: 2022
-
2. Doped Silicon Nanowires for Lithium Ion Battery Anodes
Nanostructured silicon (Si) has showed outstanding results as Li-ion battery anode material. Fabrication of nanostructured silicon anode materials is usually very complex, time consuming and expensive. In this work, silicon nanowires (SiNW`s) were produced by using rapid and uncostly metal catalyzed electroless etching (MCEE) method from various silicon wafe
Mat. Res.. Publicado em: 17/01/2019
-
3. The Effect of Electroless Bath Parameters and Heat Treatment on the Properties of Ni-P and Ni-P-Cu Composite Coatings
Ni-P-(Cu) composite coatings were applied on a St37 steel in an acidic bath of hypophosphite composite. The effect of the concentration of the Cu particles and pH of the solutionon the amount of Ni and P of the coatings, their morphology, and hardness of the coatings were explored. Some of the coated samples were also heat treated at 400ºC for 1 hour. The p
Mat. Res.. Publicado em: 08/01/2018
-
4. Influence of the Tungsten Content on Surface Properties of Electroless Ni-W-P Coatings
Ternary Ni-W-P films were produced by electroless deposition using baths with different tungsten concentrations. After deposition, the coated surfaces were annealed at 400°C for 1h. Surface morphology and film composition in the as-plated condition were assessed by SEM and EDS analyses, respectively. The crystalline phases after annealing were investigated
Mat. Res.. Publicado em: 21/11/2017
-
5. Wear Behaviour of Electroless heat Treated Ni-P Coatings as Alternative to Electroplated hard Chromium Deposits
In this present study was evaluated the influence of heat treatment on the wear resistance of electroless high phosphorus nickel coating (9-10% P wt.). In addition, both untreated and treated Ni-P deposits were then compared to electroplated hard chromium coatings in terms of wear behaviour. Three different heat treatment conditions were performed at tempera
Mat. Res.. Publicado em: 24/07/2017
-
6. Characterization of copper microelectrodes, following a homemade lithography, technique, and gold electroless deposition
We report the fabrication and characterization of copper microelectrodes obtained by a homemade lithography technique and after gold electroless deposition. For the fabrication, planes consisting of arrays of electrodes (black in color) with bow tie shape were designed and printed on a transparent paper (Canson ltd.). Using an embroidery frame with a silk fa
Matéria (Rio J.). Publicado em: 2016-03
-
7. Electroless Plating of Ni-P-W Coatings Containing Scattered Nb2O5 on Sintered NdFeB Substrate
AbstractThe ternary Ni-P-W coatings containing scattered Nb2O5particles were deposited on the sintered NdFeB substrates by electroless plating. The effect of experimental processing parameters on the deposition rate was investigated during electroless plating. The coatings performance, such as corrosion resistance, interfacial adhesion strength and micro-har
Mat. Res.. Publicado em: 2015-10
-
8. Preparation of a composite particle electrode by electroless plating and its electrocatalytic performance in the decolorization of methyl orange dye solution
Um eletrodo de partículas compósitas de carbono modificado com níquel níquel (Ni/AC) foi preparado por deposição sem aplicação de corrente com pré-tratamento livre de paládio para melhorar o desempenho eletrocatalítico do eletrodo compósito em uma cela eletroquímica. As condições de preparo do eletrodo de partículas compósitas de Ni/AC foram
J. Braz. Chem. Soc.. Publicado em: 2013-12
-
9. Electroless deposition of bis(4'-(4-Pyridyl)-2,2':6',2''-terpyridine)iron(II) thiocyanate complex onto carbon nanotubes modified glassy carbon electrode: application to simultaneous determination of ascorbic acid, dopamine and uric acid
Um eletrodo de carbono vítreo modificado por nanotubos de carbono de paredes múltiplas (NTCPM) e pelo complexo tiocianato de bis(piterpi) ferro(II) (piterpi = 4'-(4-piridil)-2,2':6',2"-terpiridina) foi investigado através de métodos voltamétricos em solução de tampão acetato (pH 5). A performance do eletrodo modificado pelo complexo de ferro(II)/NTCP
Journal of the Brazilian Chemical Society. Publicado em: 2011-03
-
10. Corrosão anisotropica e formação de superficie nanoestruturada de Si utilizando plasma de alta densidade / Si anisotropic etching and nanostructured surface formation using high density plasma
This work explores the implementation, characterization and applications of BOSCH type process for bulk silicon etching (or bulk silicon micromachining) using inductively coupled high density plasma (ICP). This etching process is characterized by its high anisotropy and is performed by alternating etching steps, employing SF6 + Ar gas mixture, and passivatio
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2009
-
11. Electroless cobalt alloys: magnetic and catalytic properties / Ligas à base de cobalto depositadas quimicamente: propriedades magnéticas e catalíticas
A influência de variáveis do banho na composição, microestrutura e nas propriedades magnéticas de filmes de CoB preparados por deposição química foi estudada. Dois diferentes tipos de agentes complexantes foram utilizados: citrato de sódio e Glicina. Filmes com menor teor de boro foram obtidos com o uso de Glicina como complexante. A deposição de
Publicado em: 2009
-
12. Fabricação e caracterização de termopares Cu/CuNixPy obtidos por deposição eletroquímica. / Fabrication and characterization of Cu/CuNixPy thermocouples obtained by electroless deposition.
In this work, it was studied chemical depositions of CuNixPy alloys and it was fabricated Cu/CuNixPy thermocouples onto silicon wafer surfaces. Initially, surfaces were pre-activated in a diluted hydrofluoric acid solution containing PdCl2. Following, it was used a de-ionizedwater- diluted alkaline chemical bath containing 15 g/l NiSO4.6H2O; 0,1-0,3 g/l CuSO
Publicado em: 2008