Diamond–DLC double layer used in corrosive protective coating

Csorbai, Hajnalka; Kovách, Gergely; Petö, G.; Csíkvári, Péter; Karacs, Albert; Sólyom, A.; Hárs, György Péter; Kálmán, E.

doi:10.1016/j.apsusc.2006.11.030

Cited by 13 publications

(9 citation statements)

References 17 publications

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“…Cross-section views by SEM (an example is shown in Fig. 3) allowed the measurement of diamond film thicknesses of about 6 mm for MCD and 3 mm for NCD layers. DLC thicknesses estimated by ellipsometry measurements were found to be approximately 540 nm and 350 nm for DLC and DLC-H, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The combination of DLC and CVD diamond in a bilayer coating gathers the best properties of the two films individually. This approach was reported by some authors [5][6][7][8] having different purposes. Csorbai et al [6] prepared a pinhole-free thin DLCdiamond double layer for corrosion protection and assessed the effect of deposition parameters on the protective properties of the layers.…”

Section: Introductionmentioning

confidence: 99%

“…This approach was reported by some authors [5][6][7][8] having different purposes. Csorbai et al [6] prepared a pinhole-free thin DLCdiamond double layer for corrosion protection and assessed the effect of deposition parameters on the protective properties of the layers. Hanyu et al [5] combined DLC with a CVD smooth surface diamond coating in order to improve the cutting performance of tools for the machining of aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

“…DC magnetron sputtering was the chosen technique for DLC deposition due to versatility and ability to produce hydrogenated coatings by reactive sputtering [3]. Works reporting a similar combination of DLC and diamond layers used pulsed laser deposition [6], rf plasma CVD [5] and ion beam [7,8] techniques.…”

Section: Introductionmentioning

confidence: 99%

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A DLC/diamond bilayer approach for reducing the initial friction towards a high bearing capacity

Amaral¹,

Carreira²,

Fernandes³

et al. 2012

Wear

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Sliding contact mechanics is used to account for the net increase of the bearing capacity of high wearresistant CVD diamond coatings when an outer layer of a DLC lubricant film is deposited on their top surface. Experimental results, namely the critical failure load, taken from reciprocating ball-on-plate tribological testing of such DLC/diamond bilayers, are on the basis of this statement. DC magnetron sputtering was used to grow thin DLC lubricant coatings (non-hydrogenated and hydrogenated varieties) on the top of CVD diamond films (microcrystalline and nanocrystalline types). The application of the von Mises maximum yield parameter (ffiffiffiffi J 2 p) criterion demonstrates to be an adequate method for designing low-friction and high-bearing capacity systems for high-demanding tribological applications. Calculation of ffiffiffiffi J 2 p supports that the most significant increase observed on the coatings' bearing capacity (from 20 N to 60 N) takes place when microcrystalline diamond is coated by hydrogenated DLC that decreases the initial friction coefficient peak (from 0.76 to 0.41).

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A DLC/diamond bilayer approach for reducing the initial friction towards a high bearing capacity

Amaral¹,

Carreira²,

Fernandes³

et al. 2012

Wear

View full text Add to dashboard Cite

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“…10 Therefore, researchers recently proposed to fabricate bi-layered diamond/DLC composite films by depositing a top-layer DLC coating on CVD diamond film with expectation of obtaining a novel diamond/DLC composite film that is expected to be able to combine the advantages of two individual films and compensates disadvantages for each other. [11][12][13][14][15] It can be arrived from the above studies that combining CVD diamond and DLC coatings might be a potential method to develop novel tribological coating materials with superior tribological properties. Therefore, the combining application of the diamond/DLCcoated drawing dies and water-lubricating technique may provide an effective approach to improve the efficiency of metal drawing production.…”

Section: Introductionmentioning

confidence: 99%

Tribological behaviors of diamond films and their applications in metal drawing production in water-lubricating condition

Chen

Shen

Sun

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part J:

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The frictional and wear performance of the microcrystalline diamond (MCD), nanocrystalline diamond (NCD) and MCD/diamond-like carbon (DLC) bi-layered film are comparatively investigated under water-lubricating conditions. A full factorial experimental plan is conducted with four sliding velocities ranging from 0.126 to 0.503 m/s and four normal loads from 2 to 8 N. The duration of each sliding process is 24 h. The results show that although the MCD/DLC film shows the lowest stable coefficient of friction ranging from 0.025 to 0.12, the top-layered DLC film does not show beneficial effect on enhancing the sliding stability of single-layered diamond films. Comparatively, the MCD film exhibits the superior sliding stability and wear resistance, which are regarded as the more critical characters that determinate the lifetime and performance of a metal drawing die. Therefore, a drawing production of aluminum pipes is conducted in the water-lubricating condition using the MCD-coated drawing die. A novel drawing device is designed for the water-lubricating metal drawing production. It is capable of providing a fully immersed drawing environment for the metal pipe and thus guarantee the lubrication and cooling effects. The result of the drawing production shows that utilizing the diamond-coated drawing die in the water-lubricating condition could elevate the production of a drawing die by over 100 times compared with using the tungsten carbide drawing dies in oil-lubricating condition. Moreover, good surface quality and geometrical precision could also be obtained by the diamond-coated drawing dies in the water-lubricating drawing.

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