Improved high-temperature stability of Si incorporated a-C:H films

Camargo, S.S.; Neto, A.L. Baia; Santos, R.A.; Freire, F. L.; Carius, R.; Finger, F.

doi:10.1016/s0925-9635(98)00165-4

Cited by 83 publications

(36 citation statements)

References 19 publications

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“…The disordering effect gives rise to either the shift of the G peak position for lower frequencies or its broadening [18,19]. Similar behaviour was found for DLC films alloyed with Ti and Si [4][5][6].…”

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confidence: 66%

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How can H content influence the tribological behaviour of W-containing DLC coatings

Silva

Branco²,

Cavaleiro

2009

Solid State Sciences

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a b s t r a c tIn this paper, the influence of the addition of W and H to pure DLC coatings on the structural, mechanical and tribological properties will be presented. The coatings were deposited by r.f. magnetron sputtering from a C target embedded with different numbers of W pellets. Working in non-reactive or reactive atmosphere allowed to deposit H-free or H-containing coatings, respectively, on steel and Si substrates. A Cr adhesion interlayer was interposed between the films and the substrate. Films with W content from 0 to 12 at.% and H incorporated up to a maximum value close to 40 at.% were deposited. All coatings had an amorphous structure, although vestiges of crystallinity could be detected in W-containing films. The addition of W led to a significant hardening of the DLC coating (from w10 to 18 GPa); inversely, with H incorporation the hardness drop down to values even lower than that of pure DLC films. It was possible to establish a good correlation between the hardness and the residual stresses. In spite of decreasing friction and wear coefficients when alloying DLC with W, almost no difference was found among the W-DLC films whatever the W content was. A similar trend was achieved with the H addition. However, in this case a decrease in the friction coefficient was registered whereas the wear rate increased. The best performance concerning the friction was obtained for an H-containing coating (0.05) whereas, for the wear resistance, H-free W-DLC films were better performing (0.3 Â 10 À16 m 3 N À1 m À1 ).

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confidence: 66%

“…However, due to the peculiar structure of DLC, with C atoms aggregated in an amorphous phase with different hybridization states, the films can reach very high compressive residual stress that limit their extensive application [1][2][3]. In order to overcome this problem, DLC films have been doped with metallic elements [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

How can H content influence the tribological behaviour of W-containing DLC coatings

Silva

Branco²,

Cavaleiro

2009

Solid State Sciences

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“…The addition of Si stabilised the coating structure by forming more sp 3 bonded carbon, thus the graphitisation was delayed. Similar thermal stability was documented for conventional RF sputtered a-C 1-x Si x :H coating in another 4 research [7]. The graphitisation took place ~500°C for samples with silicon content less than 15%.…”

Section: Introductionsupporting

confidence: 77%

Isothermal and dynamic oxidation behaviour of Mo–W doped carbon-based coating

Mandal

Ehiasarian

Hovsepian

2015

Applied Surface Science

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“…Published by Elsevier Ltd. All rights reserved. structural (sp 3 -sp 2 transition) and mechanical changes during thermal annealing [23][24][25]. Besides this structure stabilization, Si addition affects the film surface chemistry, in particular the surface energy [26], and consequently tribological characteristics [27,28].…”

Section: Introductionmentioning

confidence: 99%