跳转至内容

CN

Electrodeposition of nanocrystalline Ni-W coatings with citric acid system.

Electrodeposition of nanocrystalline Ni-W coatings with citric acid system.

Journal of nanoscience and nanotechnology (2013-05-08)

Jingjing Du, Lijian Xu, Baizhen Chen, Li De

摘要

Ni-W alloy coatings were prepared by electrodeposition technique with citric acid as a complexing agent. The influence of the main technical parameters on W content in the Ni-W alloy coatings were investigated by electron dispersive spectroscopy (EDS), and the microstructure of the coatings was characterized and analyzed by employing X-ray diffractometer (XRD), scanning electron microscope (SEM). The results showed that bright and compact Ni-W alloy coatings with 25.78 wt% W were obtained when the concentration of Na2WO4 x 2H2O was 50 g/L, the concentration of NH4Cl was 20 g/L, the bath pH value was 8.0 and the bath temperature was 70 degrees C. The surface of Ni-W alloy coatings were bright, flat and compact, the mircostructure of the alloy coatings were nanocrystalline and the average grain size was about 38 nm by calculating using Scherrer Equation.

材料

产品编号

品牌

产品描述

Sigma-Aldrich

无水柠檬酸粉末, meets analytical specification of Ph. Eur., BP, USP, E330, anhydrous, 99.5-100.5% (based on anhydrous substance)

Sigma-Aldrich

无水柠檬酸粉末, ACS reagent, ≥99.5%

Sigma-Aldrich

无水柠檬酸粉末, ≥99.5%, FCC, FG

Sigma-Aldrich

无水柠檬酸粉末, 99%

Sigma-Aldrich

无水柠檬酸粉末, anhydrous, suitable for cell culture, suitable for plant cell culture

Supelco

柠檬酸, Pharmaceutical Secondary Standard; Certified Reference Material

Sigma-Aldrich

无水柠檬酸粉末, BioUltra, anhydrous, ≥99.5% (T)

Sigma-Aldrich

镍, nanopowder, <100 nm avg. part. size, ≥99% trace metals basis

Sigma-Aldrich

Raney^®-镍, W.R. Grace and Co. Raney^® 2400, slurry, in H₂O, active catalyst

Sigma-Aldrich

钨, powder, 12 μm, 99.9% trace metals basis

Sigma-Aldrich

镍, powder, <150 μm, 99.99% trace metals basis

Sigma-Aldrich

钨, powder, ≤10 μm, ≥99.99% trace metals basis

Sigma-Aldrich

镍, foil, thickness 0.5 mm, 99.98% trace metals basis

Sigma-Aldrich

镍, wire, diam. 0.25 mm, ≥99.9%

Supelco

无水柠檬酸粉末, certified reference material, TraceCERT^®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland

Sigma-Aldrich

钨, wire, diam. 1.0 mm, 99.99% trace metals basis

Sigma-Aldrich

钨, wire, diam. 0.25 mm, ≥99.9% trace metals basis

Sigma-Aldrich

镍, rod, diam. 6.35 mm, ≥99.99% trace metals basis

Sigma-Aldrich

镍, wire, diam. 0.5 mm, ≥99.9% trace metals basis

Sigma-Aldrich

钨, foil, thickness 0.25 mm, ≥99.9% trace metals basis

Sigma-Aldrich

镍, wire, diam. 0.5 mm, ≥99.99% trace metals basis

Sigma-Aldrich

钨, wire, diam. 0.5 mm, ≥99.9% trace metals basis

Sigma-Aldrich

镍, foil, thickness 0.1 mm, 99.98% trace metals basis

Sigma-Aldrich

镍, sputtering target, diam. × thickness 2.00 in. × 0.25 in., 99.95% trace metals basis

Sigma-Aldrich

镍, foil, thickness 0.25 mm, 99.995% trace metals basis

Sigma-Aldrich

钨, foil, thickness 0.5 mm, ≥99.9% trace metals basis

Sigma-Aldrich

钨, foil, thickness 0.127 mm, ≥99.9% trace metals basis

Sigma-Aldrich

无水柠檬酸粉末, Vetec^™, reagent grade, 99%