Vacuum heat treatment of electroless Ni–B coatings

Dervos, C.T.; Novaković, Jelica; Vassiliou, P.

doi:10.1016/s0167-577x(03)00581-0

Cited by 122 publications

(88 citation statements)

References 4 publications

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“…Among these elements nickel based coatings play a major role in our everyday lives for decorative and industrial applications. Low temperature heat treatment of nickel coatings resulted higher wear resistance which equal or exceeds that of hard chromium coatings [4]. Properties such as corrosion resistance, better strength at high and low temperature, high hardness [5] and high wear resistance make nickel a suitable candidate for mechanical parts subject to abrasion and erosion.…”

Section: Methodsmentioning

confidence: 99%

Influence of Nano Al2O3 Particles on the Adhesion, Hardness and Wear Resistance of Electroless NiP Coatings

Karthikeyan¹,

Vijayaraghavan²

2015

IJMMM

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Abstract-In this present study electroless NiP coatings and NiP-Al 2 O 3 coatings had been deposited on a mild steel substrate. The surface morphology of both the coatings had studied using scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction technique. Adhesion, hardness and wear behavior were investigated and compared for NiP and NiP-Al 2 O 3 coatings. Optical micrograph images were used for the evaluation of adhesion of coatings which found sufficient and acceptable according to VDI 3198 standard. Hardness of the coating had been evaluated based on depth sensing techniques and substrate effect had avoided by maintaining depth to coating thickness ratio less than 0.1. Due to co-deposition of Al 2 O 3 particles the hardness of NiP coatings increased by 20.5% (7.8 GPa to 9.4 GPa). Dry sliding wear tests were conducted on PLINT TE66 micro scale tester against steel ball of hardness 800 HV. Wear resistance of NiP coatings increased with increase in sliding distance. The co-deposition of Al 2 O 3 particles in NiP matrix arrest the deformation during sliding of steel ball and thus wear resistance of NiP-Al 2 O 3 coatings is superior to NiP coatings. Wear crater morphology were studied using SEM and EDS. Adhesive wear mechanics was observed in NiP coatings and combination of adhesive and abrasive wear mechanism were found in NiP-Al 2 O 3 coatings.

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Section: Methodsmentioning

confidence: 99%

Influence of Nano Al2O3 Particles on the Adhesion, Hardness and Wear Resistance of Electroless NiP Coatings

Karthikeyan¹,

Vijayaraghavan²

2015

IJMMM

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“…pH of the electroless nickel bath is demanded between 12 to 14 and the reduction reaction is expected as following [11]; (1) Furthermore, as a complexing agent ethylenediamine were used to prevent precipitation of nickel hydroxide. As a stabilizer lead tungstate were utilized to control the reactions on the substrate [12].…”

mentioning

confidence: 99%

Effect of Heat Treatments for Electroless Deposited Ni-B and Ni-W-B Coatings on 7075 Al Alloy

Yildiz¹,

Genel²,

Gülmez³

2017

IJMMM

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“…Electroless Ni-B coating has an amorphous structure [20,21]. The structure of electroless Ni-B coating crystallized after the plasma nitriding treatments at the different temperatures same as heat treatment [22][23][24][25]. When XRD patterns were analyzed, it was observed that Ni 3 B phase predominated in the structure of plasma nitrided CP-Ti which was initially coated electroless Ni-B at 500…”

Section: Xrd Analysismentioning

confidence: 99%

Investigation of structural and tribological properties of duplex surface treated pure titanium

Çelik¹,

Karakan²

2016

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Commercial pure titanium (CP-Ti) is used in many engineering fields because of its superior properties such as excellent corrosion resistance, high strength/weight ratio, and biocompatibility. However, it is not available at the desired rate, since the CP-Ti has poor wear resistance. For this reason, many surface treatments have been applied to improve the poor tribological properties of the CP-Ti. In this study, duplex surface treatments, which are the combination of treatments of electroless Ni-B coating and plasma nitriding, were applied on the surfaces of the CP-Ti. Structural properties of the different surfaces of the treated materials were investigated using scanning electron microscopy (SEM) and X-ray diffraction (XRD). Microhardness measurements were made for the determination of mechanical properties and the pin-on-disk wear tests were made to determine the tribological properties. It was observed that poor wear resistance of the CP-Ti was improved with duplex surface treatments. The results showed that surface hardness, friction coefficient, and surface roughness of coated samples were better than of uncoated CP-Ti. K e y w o r d s : titanium, wear, electroless Ni-B, plasma nitriding, duplex

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Vacuum heat treatment of electroless Ni–B coatings

Cited by 122 publications

References 4 publications

Influence of Nano Al2O3 Particles on the Adhesion, Hardness and Wear Resistance of Electroless NiP Coatings

Influence of Nano Al2O3 Particles on the Adhesion, Hardness and Wear Resistance of Electroless NiP Coatings

Effect of Heat Treatments for Electroless Deposited Ni-B and Ni-W-B Coatings on 7075 Al Alloy

Investigation of structural and tribological properties of duplex surface treated pure titanium

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