Publication
Title
Tailoring mechanical properties of a-C:H:Cr coatings
Author
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/C2H2 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/m2 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.
Language
English
Source (journal)
Coatings
Publication
2023
ISSN
2079-6412
DOI
10.3390/COATINGS13122084
Volume/pages
13 :12 (2023) , p. 1-22
Article Reference
2084
ISI
001136013600001
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
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Research group
Publication type
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Affiliation
Publications with a UAntwerp address
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Record
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Creation 17.01.2024
Last edited 01.02.2024
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