Zum Korrosions‐ und Verschleißverhalten von Nickeldispersionsschichten mit Nanopartikeln

Steinhäuser, S.; Lampke, Thomas; Wielage, B.; Erler, F.; Jakob, C.

doi:10.1002/mawe.200390127

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…These failures are relevant in many industrial applications from bearings to turbine blades or heat exchangers for power generation [36] and in the same way in miniaturized mechanical, optical and electronic devices. Studies on nickel dispersion coatings give evidence that strengthening by micron-und submicronscaled particles of Al 2 O 3 , SiC or diamond is more effective than strengthening by Si 3 N 4 or TiO 2 [27,37,38]. The friction coefficient is conditioned by the content and size of incorporated particles.…”

Section: Introductionmentioning

confidence: 99%

Electroplated Nickel Composites with Micron- to Nano-Sized Particles

Wielage

Lampke

Zacher

et al. 2008

KEM

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Abstract. Electroplated nickel coatings provide ductility, excellent corrosion resistance and good wear resistance, which qualifies them to meet complex demands of engineering, microtechnology and microelectronics. The co-deposition of particles is a promising alternative to deposit layers with adequate microstructure and properties avoiding the rise of residual stress. The incorporation of the sufficient quantity of particles, monodisperse distribution and downsizing to nanometre scale affect the amount of strengthening by dispersion hardening. To avoid agglomeration in the electroplating bath as well as in the layer is a challenge which has been met by simple Watts nickel electrolyte with a minimum of organic additives and adequate bath agitation comprising sonication, i.e. the exposure of the bath to high-frequency sound waves.Well-dispersed hard particles (titanium oxide and silicon carbide) were incorporated in nickel films. The focus was set on the correlation between the gained microstructure of the composites with particles from micron to nanometre scale and the electrochemical and mechanical properties. Corrosion was quantified from polarisation curves and volumetric erosion measurements. Wear resistance was evaluated by scratch energy density studies, oscillating sliding wear testing and cavitation wear testing and compared to indentation hardness results.Sonication and particle downsizing result in matrix grain refinement and dispersion hardening. Incorporation of different particles with respect to different material and size proved to meet different demands. Submicron TiO 2 is best for high corrosion resistance, sonicated nickel without particle incorporation is best for high abrasion resistance, nano TiO 2 is best for oscillating sliding wear resistance and submicron SiC is best for cavitation wear resistance.

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Section: Introductionmentioning

confidence: 99%

Electroplated Nickel Composites with Micron- to Nano-Sized Particles

Wielage

Lampke

Zacher

et al. 2008

KEM

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“…The inclusion of nanoparticles can give an increased microhardness and corrosion resistance, modified growth to form a nanocrystalline metal deposit and a shift in the reduction potential of a metal ion [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

The influence of the solution composition including additives on the structure and composition of electrochemical Ni–B coatings

Szeptycka

Gajewska-Midziałek

2008

Phys. Status Solidi (c)

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The structure and internal stresses were investigated for d.c.‐plated Ni composite deposits prepared from a low‐concen‐tration Watts electrolyte, with and without additive agents and dispersive B particles. The dispersed phase and additives used in the bath were shown to affect the composition and structure of the electrodeposited composite layer. An increase in the content of B particles in the coating and in the size of [111] nickel crystallites led to increased roughness of Ni‐B coatings. The microhardness of the deposited Ni‐B layers increased as the size of [111] nickel crystallites decreased. The internal stresses of the deposited composite coatings depended to a large degree on the additive in the bath. Ni‐B coatings had a (100) texture, with texture (111) and (311) also frequently occurring. Orientation (100) developed even more strongly than in coatings deposited without additives. This shows that in the presence of 3‐(1‐pyridinio)‐propanesulfonate inner salt (PPS), the development of (110), (111) and (311) orientation is blocked. When the additives were used together, the dimensions of the [111] nickel crystallites in all coatings decreased to the smallest dimension in any of the studied coatings. The results suggest that as the effect of the organic compounds employed the nanostructure of the nickel matrix was developed. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Mikrostruktur‐Untersuchungen zum Schwingungsverschleißverhalten von Nickelkomposit‐ und Ni‐P‐Schichten

Lampke

Leopold

Dietrich

et al. 2006

Materialwissenschaft Werkst

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Schlüsselworte: Gefügecharakterisierung, Schwingungsverschleiß, Martenshärte, Galvanische Nickelnanokomposite, Chemisch Ni-P-Schichten In many industrial applications, oscillating sliding wear leads to serious damage of construction components. To avoid this, different layers of electroplated nickel and nickel composites as well as chemically deposited nickel phosphorus layers are used and/or tested. The performance of these layers under oscillating sliding wear was characterized. Additionally microstructure characterisations took place regarding grain size, particle content and distribution as well as concerning crystallization and development of tetragonal phase nickel phosphide. These results correlate well with the Martens hardness of the layers and contribute to understand the oscillating sliding wear characteristics of the examined layers. Heat treated Ni-P layers achieve twice the hardness of nickel dispersion layers; however, fail under oscillating sliding stress by embrittlement, cracking and debonding. On the other hand dispersion-hardening nano composites with TiO 2 clearly exhibit a more favourable tribological behaviour. A solid content of approx. 3 vol-% leads to dispersion and fine grain hardening effects, which cause good protection against oscillating sliding wear; thereby the Ni-matrix remains ductile. The incorporation of very hard particles (SiC) intensifies the oscillating sliding wear process due to the abrasive effect of the particles.

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Zum Korrosions‐ und Verschleißverhalten von Nickeldispersionsschichten mit Nanopartikeln

Cited by 3 publications

References 2 publications

Electroplated Nickel Composites with Micron- to Nano-Sized Particles

Electroplated Nickel Composites with Micron- to Nano-Sized Particles

The influence of the solution composition including additives on the structure and composition of electrochemical Ni–B coatings

Mikrostruktur‐Untersuchungen zum Schwingungsverschleißverhalten von Nickelkomposit‐ und Ni‐P‐Schichten

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