Wear behavior of bio-inspired and technologically structured HVOF sprayed NiCrBSiFe coatings

Tillmann, Wolfgang; Hagen, Leif; Stangier, Dominic; Laemmerhirt, Iris-Aya; Biermann, Dirk; Kersting, Petra; Krebs, Eugen

doi:10.1016/j.surfcoat.2015.08.055

Cited by 30 publications

(10 citation statements)

References 56 publications

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“…They then had no influence on the frictional property of testing specimens. To date, nitrogen ion implantation, anodic oxidation, high-velocity oxy fuel spraying, physical vapor deposition (PVD), and laser cladding have been employed on metal alloys after micro-texturing to improve their antifriction property [21,22,23,24].…”

Section: Introductionmentioning

confidence: 99%

Surface Characterization and Tribological Performance of Anodizing Micro-Textured Aluminum-Silicon Alloys

et al. 2019

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Eutectic aluminum-silicon alloys present high frictional coefficient and a high wear rate due to the low hardness under sliding friction conditions. In this paper, the eutectic aluminum-silicon alloy was textured firstly by micro-milling operations. Then, the micro-textured specimen was subjected to anodizing to fabricate alumina films. The surface topography, surface roughness, and bearing area ratio of micro-textured and anodizing micro-textured specimens were measured and characterized. For the anodizing micro-textured specimens, the surface roughness and superficial hardness increase compared with those for micro-textured ones. Tribological tests indicate that anodizing micro-textured samples present lower friction coefficient of 0.37 than that of flat samples of 0.43 under dry sliding conditions. However, they exhibit higher friction coefficient at 0.16 than that of flat samples of 0.13 under oil-lubricated conditions. The difference between the friction coefficient of anodizing micro-textured and flat samples under dry and oil-lubricated conditions is ascribed to the influence mechanism of surface roughness, bearing area ratio curves, and its relative parameters on the tribological performance of testing samples. The dry sliding friction coefficient has a positive correlation with bearing area ratio curves, while they present negative correlation with bearing area ratio curves under oil-lubricated conditions. The synergy method treated with micro-milling and anodizing provides an effective approach to enhance the dry sliding friction property of eutectic aluminum-silicon alloys.

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Section: Introductionmentioning

confidence: 99%

Surface Characterization and Tribological Performance of Anodizing Micro-Textured Aluminum-Silicon Alloys

et al. 2019

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“…In order to increase the service life time of such components, there are a number of technological approaches, e.g., microfinished guide pads for BTA deep hole drills (BTA: Boring and Trepanning Association) [3,4]. One possibility to reduce the wear of tribological functional surfaces is the application of so-called wear protection layers by coating processes [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Machined Surface Conditioning on the Coating Interface of High Velocity Oxygen Fuel (HVOF) Sprayed Coating

Tilger

Biermann

Abdulgader

et al. 2019

JMMP

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Roughening the substrate surface is essential for thermal sprayed coatings. In this regard, sandblasting has established itself as an easy to use surface conditioning procedure. The quality of the obtained roughness depends on the conditions of the sandblasting material, adjusted parameters, and the kind of the process execution (manual or mechanical). These preconditions limit the reproducibility of the roughness obtained. Sandblasting causes residual compressive stress and may also lead to the inclusion of sand particles and notches in the roughened surface, which affects the interfacial properties of the coating, as well as the flexural strength of the coated parts. The hardness of the roughened surface plays, thereby, an important role. However, in order to reliably avoid these effects, microfinishing can be used as an alternative to generate a homogenous roughened substrate surface, control the induced residual stresses, and increase the reproducibility. In addition, the roughened surface pattern can be produced during the chip forming process of the to-be-coated parts. The utilization of the appropriate combination of machining processes and parameters should lead to the required surface pattern and thus to an enhanced coating adhesion and flexural strength of the coated part. The induced residual stresses and the quality of the obtained surface roughness have a significant influence on the coating adhesion and the lifespan of the coated parts. This paper aims to analyze, as a first step, the effect of the turning and microfinishing on the surface conditioning of the bearing steel 100Cr6 (AISI 52100). The investigation concludes by comparing the microfinished with the sandblasted surfaces with regard to the interface to and the adhesion of the WC–Co high velocity oxygen fuel (HVOF) sprayed coatings on them. Surface conditioning plays a decisive role by the induced residual stresses and the elimination of adhesion defects.

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“…Moreover, many surface engineering technologies are initiated to prolong the surface service life of the paired components, such as surface carburizing and nitriding treatment, 4–6 laser hardening, 7 spark surface hardening, 8 and surface coating. 9,10 However, the great challenge of these technologies is that the produced hard layer on the surfaces are easy to break off from the spherical plain bearing under the condition of heavy shock loads. Therefore, the aviation spherical plain bearings are usually not permitted to coat these hard layers.…”

Section: Introductionmentioning

confidence: 99%

Investigation on surface morphology and tribological property generated by vibration assisted strengthening on aviation spherical plain bearings

Yuan

Qin

Cheng

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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The extreme and complex working conditions require aviation spherical plain bearings not only to have high machining accuracy and low surface roughness, but also to possess high surface microhardness and lubricant retaining capability. This paper presents a vibration assisted strengthening approach to achieving the synergistic effects of the surface property-improving and appearance-improving. The research attempts to answer how vibration assisted strengthening technique can improve the surface tribological properties of aviation spherical plain bearing components particularly in light of proposing the flat-headed asperity distribution model and the corresponding elastic–plastic contact modelling for the special processed surface morphology. Subsequently, the models are corroborated by the experimental results of characterizing the surface morphology produced by vibration assisted strengthening with different parameters such as rolling times and rolling static force. The surface tribological properties of spherical plain bearing specimens were studied by employing the UMT-TriboLab platform. The theoretical analysis and experimental results indicate that the surface asperities of spherical plain bearing components processed with repeated high frequency strikes present a flat-headed distribution but not Gauss distribution. It characterizes with a marked majority of produced small asperities with similar height, which is beneficial to frictional couple contacts and a lot of original valleys retaining lubricants. The processing technique contributes to increasing the surface microhardness by 20% and decreasing the surface roughness from about Ra 0.4 µm to below Ra 0.1 µm. The ball-on-flat friction tests demonstrate that both the special flat-headed surface structure and the elevated microhardness can attribute the improvement of tribological properties and wear resistance performance of spherical plain bearings.

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Wear behavior of bio-inspired and technologically structured HVOF sprayed NiCrBSiFe coatings

Cited by 30 publications

References 56 publications

Surface Characterization and Tribological Performance of Anodizing Micro-Textured Aluminum-Silicon Alloys

Surface Characterization and Tribological Performance of Anodizing Micro-Textured Aluminum-Silicon Alloys

The Effect of Machined Surface Conditioning on the Coating Interface of High Velocity Oxygen Fuel (HVOF) Sprayed Coating

Investigation on surface morphology and tribological property generated by vibration assisted strengthening on aviation spherical plain bearings

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