Optimising deposition parameters of W-DLC coatings for tool materials of high speed steel and cemented carbide

Czyżniewski, A.

doi:10.1016/j.vacuum.2012.06.011

Cited by 50 publications

(22 citation statements)

References 30 publications

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“…Therefore, the obvious slight scatter in the correlation diagram (Figure 7) is definitely not primarily caused by random influences. Additionally, the results of the present study indicate that this effect of φ(C 2 H 2 ), which was also reported by Czyżniewski [39], is more pronounced at low sputtering power (two-factor interaction AD). An increase in the ethine flow rate results in an increased and, hence, more favorable H/E ratio.…”

Section: H/e Ratiosupporting

confidence: 90%

“…Within the scope of smaller studies, an increase in hardness with increasing bias voltage is also described in [5,12,39]. A general decrease in hardness with increasing ethine flow rate is shown in [12,39]. Furthermore, [12] describes a relationship between the deposition parameters, ethine flow and bias voltage, and the mechanical properties, reduced Young's modulus and hardness, which is similar to that observed in the present study.…”

Section: Young's Modulus and Indentation Hardnesssupporting

confidence: 83%

“…Even though the observed positive effect of the bias voltage on E and H IT was also reported by other authors [5,12,39], no full explanation has been provided yet. With respect to a-C:H:W coatings, the negative effect of the argon flow (C) on E an H IT has not yet been described in the literature.…”

Section: Effects Of the Bias Voltage And The Argon Flow Ratementioning

confidence: 57%

“…At first glance, this suggests that there is generally not too much scope for independently adapting the Young's modulus and hardness of a-C:H:W coatings. Within the scope of smaller studies, an increase in hardness with increasing bias voltage is also described in [5,12,39]. A general decrease in hardness with increasing ethine flow rate is shown in [12,39].…”

Section: Young's Modulus and Indentation Hardnessmentioning

confidence: 86%

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Empirical-Statistical Study on the Relationship between Deposition Parameters, Process Variables, Deposition Rate and Mechanical Properties of a-C:H:W Coatings

et al. 2014

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Tungsten-modified hydrogenated amorphous carbon coatings (a-C:H:W) were deposited on high speed steel by reactive magnetron sputtering of a tungsten carbide target in an argon-ethine atmosphere. The deposition parameters, sputtering power, bias voltage, argon and ethine flow rate, were varied according to a central composite design comprising 25 different parameter combinations. For comparison, a tungsten carbide coating was deposited, as well. During coating deposition, the process variables, total pressure, sputtering voltage and bias current, were measured as process characteristics. The thickness of the deposited coatings was determined using the crater grinding method, and the deposition rate was calculated. Young's modulus E and indentation hardness H IT were characterized by means of nanoindentation. With E = 80 − 253 GPa and H IT = 7.8 − 22.0 GPa, the mechanical properties were found to vary strongly in between different a-C:H:W variants. Using statistical methods, it is shown that these properties, as well as the deposition rate significantly depend on all four varied parameters. Despite a very similar influence of the parameters on modulus and hardness, as well as a very strong correlation of both properties, it is pointed out statistically that the H/E ratio, which is an indicator of the wear resistance, can be adapted in a targeted way and with some degree of independence.

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Section: H/e Ratiosupporting

confidence: 90%

Section: Young's Modulus and Indentation Hardnesssupporting

confidence: 83%

Section: Effects Of the Bias Voltage And The Argon Flow Ratementioning

confidence: 57%

Section: Young's Modulus and Indentation Hardnessmentioning

confidence: 86%

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Empirical-Statistical Study on the Relationship between Deposition Parameters, Process Variables, Deposition Rate and Mechanical Properties of a-C:H:W Coatings

et al. 2014

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“…Hard Cr/CrN x -layers are used as adhesion promoter between substrate and the upper layers. A tungsten doped a-C:H interlayer (a-C:H:W) is used as an mediator between the adhesion and the top layer to further improve the fracture toughness [11,12]. Both variants were tribologically analyzed, wherein the influence on mechanical properties of the deposition parameters was investigated for the Cr/CrN x /a-C:H:W layer system.…”

Section: Introductionmentioning

confidence: 99%

Development, characterization and testing of tungsten doped DLC coatings for dry rotary swaging

Hasselbruch

Herrmann

Mehner

et al. 2015

MATEC Web of Conferences

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Abstract. The extensive use of lubricant during rotary swaging is particularly required for a good surface finish of the work piece and the reduction of tool wear. Abandonment of lubricant would improve the ecological process-balance and could also accelerate for further work piece refinements. Also cleaning of the manufactured components becomes obsolete. Thus, a dry machining is highly innovative, consequently new strategies to substitute the lubricant functions become necessary. To encounter the changed tribological conditions due to dry rotary swaging, low friction, tungsten doped, hard DLC coatings and structured surfaces are the most promising approaches. In this work the development of hard coating by means of reactive magnetron sputtering is presented, a promising layer variant is deposited on a set of tools and then tested and investigated in real use.

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MEREC-MABAC Based-Parametric Optimization of Chemical Vapour Deposition Process for Diamond-Like Carbon Coatings

Prabhukumar,

Chohan,

Kalita

2023

Lecture Notes in Networks and Systems

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Optimising deposition parameters of W-DLC coatings for tool materials of high speed steel and cemented carbide

Cited by 50 publications

References 30 publications

Empirical-Statistical Study on the Relationship between Deposition Parameters, Process Variables, Deposition Rate and Mechanical Properties of a-C:H:W Coatings

Empirical-Statistical Study on the Relationship between Deposition Parameters, Process Variables, Deposition Rate and Mechanical Properties of a-C:H:W Coatings

Development, characterization and testing of tungsten doped DLC coatings for dry rotary swaging

MEREC-MABAC Based-Parametric Optimization of Chemical Vapour Deposition Process for Diamond-Like Carbon Coatings

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