The study of the adhesion of a TiN coating on steel and titanium alloy substrates using a multi-mode scratch tester

Stallard, J.; Poulat, S.; Teer, D.G.

doi:10.1016/j.triboint.2005.04.011

Cited by 117 publications

(29 citation statements)

References 17 publications

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“…The scratch test process involves making a scratch with a diamond indenter loaded by either a fixed or increasing force. The magnitude of force at which the separation of the coating from the substrate or other effects of the coating loosing its integrity, such as micro-cracks or delamination will occur, is defined as the critical load [1,4,5]. The value of the critical load depends on the properties of the coating, e.g.…”

Section: Introductionmentioning

confidence: 99%

Degradation of coatings based on 310S steel doped with Al and Ir additives by the scratch test

Kucharska

2011

Open Physics

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Abstract:Mechanical tests of PVD coatings made on steel 310S were carried out within this study by the scratch test method. It was found that the additions of Al and Ir caused lower critical load values compared to the coating without additions. Despite the reduction of the critical load of the coating by the aluminium addition, the effect of aluminium was considered advantageous owing to the refinement of the structure causing the coating to become more plastic and reducing the number and sizes of micro-cracks. The addition of iridium results in an embrittlement of the coating structure and its poorer adhesion to the substrate. Comparison of the findings from the scratch test with the observations from an optical and a scanning microscopes was also made.

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Section: Introductionmentioning

confidence: 99%

Degradation of coatings based on 310S steel doped with Al and Ir additives by the scratch test

Kucharska

2011

Open Physics

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“…Three measurements were taken for each sample and the average values are reported. Adhesion of the as-deposited and annealed coatings was evaluated using a Teer Coatings ST3001 Scratch Tester (Teer Coatings, Droitwich, UK) [29]. A 200 µm radius conical diamond indenter was used and the coated samples underwent a progressive load of 10-40 N at a rate of 10 N min −1 and velocity of 10 mm min −1 .…”

Section: Coating Characterisationmentioning

confidence: 99%

Photocatalytic Properties of Doped TiO2 Coatings Deposited Using Reactive Magnetron Sputtering

2017

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Mechanically robust photocatalytic titanium oxide coatings can be deposited using reactive magnetron sputtering. In this article, we investigate the effect of doping on the activity of reactively sputtered TiO 2 . Silver, copper and stainless steel targets were used to co-deposit the dopants. The films were characterised using XRD, SEM and EDX. Adhesion and mechanical properties were evaluated using scratch testing and nano-indentation, respectively, and confirmed that the coatings had excellent adhesion to the stainless steel substrate. All coatings showed superhydrophilicity under UV irradiation. A methylene blue degradation test was used to assess their photocatalytic activity and showed all coatings to be photoactive to varying degrees, dependent upon the dopant, its concentration and the resulting coating structure. The results demonstrated that copper doping at low concentrations resulted in the coatings with the highest photocatalytic activity under both UV and fluorescent light irradiation.

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“…Adhesion test for variants of chromium deposits was carried out using the scratch tester ST 30 (with a diamond indentor, a cone angle of 120 degrees, tip radius of 0.2 mm and load range of 1.0 -200.0 N) designed to characterize the adhesive strength of coatings deposited on flat substrates (Stallard et al [30]). The scratch tester enables measurement of the critical load at which a coating first shows signs of failure.…”

Section: Scratch Adhesion Testingmentioning

confidence: 99%

“…The presence of microcracks could be as a result of residual tensile stress especially at thicknesses exceeding 0.8 microns. However, chromium deposition on Al 1050 and Al 6061 appear to have better surface characteristics compared to the over thirty microcracks per sq-mm observed on deposits from a hexavalent chromium electrolyte bath according to Dennis and Such [5] and Snyder [30]. Variant coatings of Al 1050 and Al 6061 were studied to quantify surface roughness using atomic force microscopy.…”

Section: Surface Characterization Of Chromium Electroplated Al 1050 Amentioning

confidence: 99%

Chromium Electroplating of Aluminium Alloys Using Electroless Nickel as Underlayer

Oduoza¹,

Khan²,

Sihra³

2014

MSCE

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The growing demand for chromium coated aluminium components especially for the automotive industry is due to their favourable physical properties (density, strength to weight ratio etc.). However, their frequent use under harsh environmental conditions renders them corrosion sensitive and consequently they need to be protected. An approach that has been applied in industry is to directly electroplate nickel onto aluminium substrate prior to a top metallic finish; however, in components with complex geometry, certain areas could become exposed to corrosion attack due to poor surface coverage during plating. In this study, a modified electroless nickel undercoat was applied to pre-treated aluminium alloys prior to duplex nickel and chromium plating with a view to enhance corrosion resistance, improve coating adherence and durability, and overall, to achieve substrate protection. Hexavalent and trivalent chromium were applied to pre-treated Al 1050 and Al 6061 following electroless nickel deposition, and plating performance was assessed by surface and corrosion techniques, while durability was measured by scratch, adhesion and hardness tests. Overall, while chromium plating with an electroless nickel undercoat did not improve corrosion resistance or hardness of the materials, it provided an additional protective layer for the substrate with a potential for longer term durability.

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The study of the adhesion of a TiN coating on steel and titanium alloy substrates using a multi-mode scratch tester

Cited by 117 publications

References 17 publications

Degradation of coatings based on 310S steel doped with Al and Ir additives by the scratch test

Degradation of coatings based on 310S steel doped with Al and Ir additives by the scratch test

Photocatalytic Properties of Doped TiO2 Coatings Deposited Using Reactive Magnetron Sputtering

Chromium Electroplating of Aluminium Alloys Using Electroless Nickel as Underlayer

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