Dispersed strengthening of a diamond composite electrochemical coating with nanoparticles

Полушин, Н. И.; Кудинов, А. С.; Zhuravlev, V. V.; Stepareva, N. N.; Maslov, A L

doi:10.3103/s1067821213050088

Cited by 11 publications

(7 citation statements)

References 1 publication

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“…It can be observed that there is an intense (111) crystallographic plane peak of Nanodiamond particles tend to form agglomerates, as reported by various authors [39,41,52]. Hence, the spheroids were aggregates of nanodiamonds at the top of the Cr-DND layer in the coating.…”

Section: Phase Analysissupporting

confidence: 59%

“…Ni-P coatings possess fairly high hardness, corrosion and wear resistance [36,37]. For this reason, a promising direction for the use of chromium-based CECs with DND and nickel-based CECs with DND, when certain conditions are met, is the coating of Ni as a matrix with DND, which does not provide the high strength characteristic for tool strengthening [38,39].…”

Section: Introductionmentioning

confidence: 99%

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Preparation and Characterization of the Cr-Nanodiamonds/MoN Coatings with Performant Mechanical Properties

et al. 2022

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This paper presents the results of a study on the preparation and characterization of a Cr-DND/MoN detonation chromium-nanodiamond coating deposited on cemented tungsten carbide (WC–3 wt.% Co) mill blades using Arc-PVD and electrodeposition methods. The physical and mechanical characteristics of the coatings were investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), XRD analysis, Raman spectroscopy, micro-identification, and scratch test (evaluation of the coating adhesion). It was shown that the Cr-DND/MoN coating consists of successive layers of Cr-DND (top), Cu (middle) and MoN (bottom) with separate phases of γ-Mo2N, α-Mo, α-Cu, Cr-DND and nanodiamonds. The Cr-DND composite electrochemical coating (CEC) was deposited from the conventional chromium plating electrolyte with the addition of nanodiamonds. The copper interlayer was deposited by the Arc-PVD method on the surface of the MoN coating to improve the adhesion strength of the Cr-DND CEC. The coating showed an optimum microhardness of about 14 ± 1 GPa and good adhesion with a critical load Lc of about 93 N. In addition to the expected experimental results, the coating has high wear resistance, confirmed by scratch tests.

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Section: Phase Analysissupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of the Cr-Nanodiamonds/MoN Coatings with Performant Mechanical Properties

et al. 2022

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“…Hardness of the resulting coating binder is 201-228 HV. This is an obvious advantage of the obtained Sn-Cu-Co binder over nickel binders having the hardness of around 100 HV [4].…”

Section: Discussionmentioning

confidence: 95%

“…The layer consists of diamond particles enveloped in a metallic binder. To apply diamond-containing coatings on specially-shaped surfaces, various methods are used (in particular, electroplating and vacuum brazing) [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Structure Formation of Diamond-Containing Coatings during Sintering of Specially-Shaped Grinding Wheels

2022

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In this work, the structure formation of powder diamond-containing coatings with Sn-Cu-Co binders during sintering of specially-shaped grinding wheels has been studied. The kinetics of structure formation was studied using diamond-free metallic binders and diamond-containing samples. Powder components of the coatings were mixed with an organic plasticizer and applied on steel workpieces by rolling. Sintering was performed in vacuum at 700–820 °C. The microstructure, phase composition, and distribution of elements in metallic binders and interface layers between the binders and steel base were studied. The morphology of the surface and structure of fractures of the diamond-containing samples have been examined. Stages of structure formation of the coatings during heating and sintering have been found. At 700–780 °C, diffusion of tin into copper particles plays the key role in the structure formation of the coatings. Dissolution-reprecipitation of cobalt at 780–820 °C has a significant effect on formation of the coating structure and interface layers between the coating and steel base.

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Structural and Mechanical Properties of the ZrC/Ni-Nanodiamond Coating Synthesized by the PVD and Electroplating Processes for the Cutting Knifes

Chayeuski

Zhylinski

Cernashejus

et al. 2018

J. of Materi Eng and Perform

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In this work, combined gradient ZrC/Ni-nanodiamond ultradispersed diamonds (UDD) coatings were synthesized on the surface of knife blades made of hard alloy WC-2 wt.% Co by electroplating and cathode arc evaporation PVD techniques to increase the durability period of a wood-cutting milling tool. The microstructure, phase and elemental composition, microhardness, and adhesion strength of the coatings were investigated. Ni-UDD layer is not mixed with the ZrC coating and hard alloy substrate. Cobalt is present in Ni-UDD layer after deposition of ZrC. The ZrC/Ni-nanodiamond coating consists of separate phases of zirconium carbide (ZrC), a-Ni, and Ni-UDD. The maximum value of microhardness of the Ninanodiamond coating is 5.9 GPa. The microhardness value of the ZrC/Ni-nanodiamond coatings is 25 ± 6 GPa, which corresponds to the microhardness of the hard alloy substrate and ZrC coating. The obtained high values of the critical loads on the scratch track of the ZrC/Ni-nanodiamond coating in 24 N prove a sufficiently high value of the adhesion strength of the bottom Ni-UDD layer with WC-Co substrate. Pilot testing of ZrC/Ni-nanodiamond-coated cutting tools proved their increasing durability period to be 1.5-1.6 times higher than that of bare tools, when milling laminated chipboard.

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Dispersed strengthening of a diamond composite electrochemical coating with nanoparticles

Cited by 11 publications

References 1 publication

Preparation and Characterization of the Cr-Nanodiamonds/MoN Coatings with Performant Mechanical Properties

Preparation and Characterization of the Cr-Nanodiamonds/MoN Coatings with Performant Mechanical Properties

Structure Formation of Diamond-Containing Coatings during Sintering of Specially-Shaped Grinding Wheels

Structural and Mechanical Properties of the ZrC/Ni-Nanodiamond Coating Synthesized by the PVD and Electroplating Processes for the Cutting Knifes

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