Tailoring Mechanical Properties of a-C:H:Cr Coatings

Alireza Bagherpour; Paul Baral; Marie-Stéphane Colla; Andrey Orekhov; Hosni Idrissi; HAYE Emile; Thomas Pardoen; Stéphane Lucas

doi:10.3390/coatings13122084

Tailoring Mechanical Properties of a-C:H:Cr Coatings

Alireza Bagherpour, Paul Baral, Marie-Stéphane Colla, Andrey Orekhov, Hosni Idrissi, HAYE Emile, Thomas Pardoen, Stéphane Lucas

Research output: Contribution to journal › Article › peer-review

Abstract

The development of coatings with tunable performances is critical to meet a wide range of technological applications each one with different requirements. Using the plasma-enhanced chemical vapor deposition (PECVD) process, scientists can create hydrogenated amorphous carbon coatings doped with metal (a-C:H:Me) with a broad range of mechanical properties, varying from those resembling polymers to ones resembling diamond. These diverse properties, without clear relations between the different families, make the material selection and optimization difficult but also very rich. An innovative approach is proposed here based on projected performance indices related to fracture energy, strength, and stiffness in order to classify and optimize a-C:H:Me coatings. Four different a-C:H:Cr coatings deposited by PECVD with Ar/C ₂H ₂ discharge under different bias voltage and pressures are investigated. A path is found to produce coatings with a selective critical energy release rate between 5–125 J/m ² without compromising yield strength (1.6–2.7 GPa) and elastic limit (≈0.05). Finally, fine-tuned coatings are categorized to meet desired applications under different testing conditions.

Original language	English
Article number	2084
Journal	Coatings
Volume	13
Issue number	12
DOIs	https://doi.org/10.3390/coatings13122084
Publication status	Published - 14 Dec 2023

Funding

This research was funded by the Walloon region under the PDR FNRS project number C 62/5—PDR/OL, semaphore 33677636. H. Idrissi acknowledge the financial support by the Belgian National Fund for Scientific Research (FSRFNRS) under Grant CDR—J.0113.20. M.-S. Colla acknowledges the financial support of National Fund for Scientific Reaserch (FNRS), Belgium.

Funders	Funder number
FSRFNRS	CDR—J.0113.20
National Fund for Scientific Reaserch
Fonds de la Recherche Scientifique F.R.S.-FNRS	33677636

Keywords

chromium-doped hydrogenated amorphous carbon
fracture toughness
hardness
magnetron sputtering
materials selection
tensile testing

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title = "Tailoring Mechanical Properties of a-C:H:Cr Coatings",

abstract = "The development of coatings with tunable performances is critical to meet a wide range of technological applications each one with different requirements. Using the plasma-enhanced chemical vapor deposition (PECVD) process, scientists can create hydrogenated amorphous carbon coatings doped with metal (a-C:H:Me) with a broad range of mechanical properties, varying from those resembling polymers to ones resembling diamond. These diverse properties, without clear relations between the different families, make the material selection and optimization difficult but also very rich. An innovative approach is proposed here based on projected performance indices related to fracture energy, strength, and stiffness in order to classify and optimize a-C:H:Me coatings. Four different a-C:H:Cr coatings deposited by PECVD with Ar/C 2H 2 discharge under different bias voltage and pressures are investigated. A path is found to produce coatings with a selective critical energy release rate between 5–125 J/m 2 without compromising yield strength (1.6–2.7 GPa) and elastic limit (≈0.05). Finally, fine-tuned coatings are categorized to meet desired applications under different testing conditions.",

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AU - Bagherpour, Alireza

AU - Baral, Paul

AU - Colla, Marie-Stéphane

AU - Orekhov, Andrey

AU - Idrissi, Hosni

AU - Emile, HAYE

AU - Pardoen, Thomas

AU - Lucas, Stéphane

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N2 - The development of coatings with tunable performances is critical to meet a wide range of technological applications each one with different requirements. Using the plasma-enhanced chemical vapor deposition (PECVD) process, scientists can create hydrogenated amorphous carbon coatings doped with metal (a-C:H:Me) with a broad range of mechanical properties, varying from those resembling polymers to ones resembling diamond. These diverse properties, without clear relations between the different families, make the material selection and optimization difficult but also very rich. An innovative approach is proposed here based on projected performance indices related to fracture energy, strength, and stiffness in order to classify and optimize a-C:H:Me coatings. Four different a-C:H:Cr coatings deposited by PECVD with Ar/C 2H 2 discharge under different bias voltage and pressures are investigated. A path is found to produce coatings with a selective critical energy release rate between 5–125 J/m 2 without compromising yield strength (1.6–2.7 GPa) and elastic limit (≈0.05). Finally, fine-tuned coatings are categorized to meet desired applications under different testing conditions.

AB - The development of coatings with tunable performances is critical to meet a wide range of technological applications each one with different requirements. Using the plasma-enhanced chemical vapor deposition (PECVD) process, scientists can create hydrogenated amorphous carbon coatings doped with metal (a-C:H:Me) with a broad range of mechanical properties, varying from those resembling polymers to ones resembling diamond. These diverse properties, without clear relations between the different families, make the material selection and optimization difficult but also very rich. An innovative approach is proposed here based on projected performance indices related to fracture energy, strength, and stiffness in order to classify and optimize a-C:H:Me coatings. Four different a-C:H:Cr coatings deposited by PECVD with Ar/C 2H 2 discharge under different bias voltage and pressures are investigated. A path is found to produce coatings with a selective critical energy release rate between 5–125 J/m 2 without compromising yield strength (1.6–2.7 GPa) and elastic limit (≈0.05). Finally, fine-tuned coatings are categorized to meet desired applications under different testing conditions.

KW - chromium-doped hydrogenated amorphous carbon

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KW - hardness

KW - magnetron sputtering

KW - materials selection

KW - tensile testing

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JO - Coatings

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ER -

Tailoring Mechanical Properties of a-C:H:Cr Coatings

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