Lubricated sliding wear behaviour of Ni–P–W multilayered alloy coatings produced by pulse plating

Panagopoulos, C.; Papachristos, V.D.; Christoffersen, Lasse

doi:10.1016/s0040-6090(00)00749-5

Cited by 43 publications

(13 citation statements)

References 15 publications

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“…Besides, the wear becomes severe with increasing applied load regardless of the dry sliding or oil lubrication conditions. For large loads, the coating material is easily cut out by the large shear force due to the severe abrasive because of the compact contact between the matched surfaces, as reported in other literatures, 15,16 which is the main reason for the occurrence of spindle failure under harsh working conditions. Figures 10 and 11 give surface morphologies at different applied loads under dry sliding and oil lubrication conditions, respectively.…”

Section: At Varied Coating Thicknessmentioning

confidence: 94%

Hard chromium coating effects on tribological performances for nonlubricated and lubricated spindle of cotton picker

Meng

Nai-wei²,

Chen

2015

Proceedings of the Institution of Mechanical Engineers, Part L:

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A spindle is the core component of a cotton picker, whose performance affects the efficiency of picking cotton directly. To enhance the spindle's strength and wear resistance, it is desired to add a coating on the spindle surface. In the present study, the tribological mechanism of hard chromium coating used for the spindle made of 20CrMnTi is investigated under the dry sliding and oil lubrication conditions. Experimental results show that conclusions about the tribological mechanism of the hard chromium coating under a dry sliding condition are not completely suitable for the lubricated spindle.

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Section: At Varied Coating Thicknessmentioning

confidence: 94%

Hard chromium coating effects on tribological performances for nonlubricated and lubricated spindle of cotton picker

Meng

Nai-wei²,

Chen

2015

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Under lubricated conditions, a Stribeck curve is often used to indicate lubrication mechanisms [9][10][11]. In the Stribeck curve, the friction coefficient is plotted as a function of the Hersey parameter (H), which is defined as the product of the dynamic viscosity η of the oil in Pa s and the sliding speed ν at the contact in m/s, divided by the pressure p in the contact zone in Pa, i.e.…”

Section: Methodsmentioning

confidence: 99%

Tribological characterization of electroless NiP coatings lubricated with biolubricants

Ramalho

Miranda

2007

Wear

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Electroless nickel (EN) coatings are used in a wide range of applications concerning their excellent mechanical and tribological properties. The incorporation of solid lubricants, such as polytetrafluoroethylene (PTFE), could even improve the properties of the EN coatings. Above all, we can achieve a film with self-lubricating and excellent anti-sticking characteristics. These uses of electroless nickel coatings are widespread in dry contacts. However, it is well known that in the mechanical components there are a large number of applications that require especially low friction, usually not compatible with the use of unlubricated contacts. Moreover, nowadays, there is a general concern with the environmental impact in the use of lubricants. The tendency is to use fluids with small environmental impact, reducing the contamination made by lubricants of mineral origin. Hence, the aim of the present work was to investigate and improve the understanding of the behaviour of EN and EN + PTFE coatings under lubricated contacts using biolubricants. Tests of coated cylinders were done in lubricated contact against hard AISI 52100 steel on a crossed cylinder sliding tester. The tests were carried out varying widely both the sliding speed and the normal applied load. To allow the comparison of different lubricants, Stribeck curves were used. The influence of the different lubricants under study on the wear amount was investigated by measuring the wear scar on the end of each test. Scanning electron microscopy was used to identify the wear mechanisms.

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“…[9][10][11] The advantages of electrodeposition over physical deposition methods are numerous: no need of vacuum equipment, easier handling, higher deposition rates. 12 Moreover, electrodeposition has the potential to yield amorphous and microcrystalline alloys which cannot be obtained from the corresponding thermally produced alloys of the same chemical composition.…”

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confidence: 99%

Effect of Current Density on the Microstructure and Magnetic Properties of Electrodeposited Co₂FeSn Heusler Alloy

Duan

Kou

2013

J. Electrochem. Soc.

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Synthesis of Co 2 FeSn Heusler alloy using a simple and low-cost electrodeposition method is reported for the first time. The effect of deposition current density on crystal structure, chemical composition, morphology and magnetic properties of the samples was studied. The electrodeposited Co 2 FeSn alloy showed a nanocrystalline structure. Magnetic measurement reveals that the obtained Co 2 FeSn are soft magnetic at room temperature with the coercivity of 32 Oe. The saturation magnetic moment of the electrodeposited Co 2 FeSn alloy at 5 K is estimated to be 4.5 μ B /f.u. The relationship between the microstructure and magnetic properties of the samples was discussed.The Co 2 YZ (Y = transition metals, Z = main group element) Heusler compounds are of special interest for applications as they exhibit a large saturation magnetization and high value of Curie temperature. They are a remarkable class of magnetic materials that hold the greatest potential to achieve half-metallicity at room temperature and are also ideal for spintronics. 1,2 Up to now, a large number of Co 2 YZ compounds have been synthesized and their structures and physical properties have been investigated. 3 Various methods include magnetron sputtering, 4,5 molecular beam epitaxy, 6 arc melting 7 and ballmilling 8 are commonly used to prepare the Heusler alloys.Recently, there has been a renaissance of the electrochemical deposition method for the synthesis of compositionally modulated alloys, because the electrodeposition process is cheap and is possible for industrial production. 9-11 The advantages of electrodeposition over physical deposition methods are numerous: no need of vacuum equipment, easier handling, higher deposition rates. 12 Moreover, electrodeposition has the potential to yield amorphous and microcrystalline alloys which cannot be obtained from the corresponding thermally produced alloys of the same chemical composition. 13 Regretfully, up to now, there are no studies on the synthesis of Co 2 YZ Heusler alloys using the electrodeposition method.Co 2 FeSn is a cheap Heusler alloy and is predicted to have considerably large magnetic moment according to Slater-Pauling behavior. 14,15 In Co 2 YZ Heusler compounds with the cubic L2 1 ordered structure, Co atoms occupy the Wyckoff position 8c (1/4, 1/4, 1/4), Y and Z atoms are located at 4a (0, 0, 0) and 4b (1/2, 1/2, 1/2), respectively. Depending on site exchangeability, various types of site disorders have been identified: if all atomic sites are equivalent, the Co 2 YZ Heusler alloy will show an A2-type disorder [body-centered cubic (bcc) lattice]; while if only Y and Z atoms are exchangeable, the 4a and 4b positions become equivalent, the Co 2 YZ Heusler alloy will show a B2 ordered structure (simple cubic lattice). 16 In our previous work, Heusler Co 2 FeSn nanoparticles in a B2-type cubic structure have been synthesized by using a solution reduction method. 17 The obtained Heusler Co 2 FeSn nanoparticles were ferromagnetic at room temperature and showed a saturation magnetization (...

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Lubricated sliding wear behaviour of Ni–P–W multilayered alloy coatings produced by pulse plating

Cited by 43 publications

References 15 publications

Hard chromium coating effects on tribological performances for nonlubricated and lubricated spindle of cotton picker

Hard chromium coating effects on tribological performances for nonlubricated and lubricated spindle of cotton picker

Tribological characterization of electroless NiP coatings lubricated with biolubricants

Effect of Current Density on the Microstructure and Magnetic Properties of Electrodeposited Co₂FeSn Heusler Alloy

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Lubricated sliding wear behaviour of Ni–P–W multilayered alloy coatings produced by pulse plating

Cited by 43 publications

References 15 publications

Hard chromium coating effects on tribological performances for nonlubricated and lubricated spindle of cotton picker

Hard chromium coating effects on tribological performances for nonlubricated and lubricated spindle of cotton picker

Tribological characterization of electroless NiP coatings lubricated with biolubricants

Effect of Current Density on the Microstructure and Magnetic Properties of Electrodeposited Co2FeSn Heusler Alloy

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Product

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About

Effect of Current Density on the Microstructure and Magnetic Properties of Electrodeposited Co₂FeSn Heusler Alloy