Enhancing corrosion resistance, hardness, and crack resistance in magnetron sputtered high entropy CoCrFeMnNi coatings by adding carbon
This study explores carbon addition as a materials design approach for simultaneously improving the hardness, crack resistance, and corrosion resistance of high entropy thin films. CoCrFeMnNi was selected as a starting point, due to its high concentration of weak carbide formers. The suppression of...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-07-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S026412752100263X |
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| author | León Zendejas Medina Marcus V. Tavares da Costa E. Maria Paschalidou Greta Lindwall Lars Riekehr Marcus Korvela Stefan Fritze Szilárd Kolozsvári E. Kristofer Gamstedt Leif Nyholm Ulf Jansson |
| author_facet | León Zendejas Medina Marcus V. Tavares da Costa E. Maria Paschalidou Greta Lindwall Lars Riekehr Marcus Korvela Stefan Fritze Szilárd Kolozsvári E. Kristofer Gamstedt Leif Nyholm Ulf Jansson |
| author_sort | León Zendejas Medina |
| collection | DOAJ |
| description | This study explores carbon addition as a materials design approach for simultaneously improving the hardness, crack resistance, and corrosion resistance of high entropy thin films. CoCrFeMnNi was selected as a starting point, due to its high concentration of weak carbide formers. The suppression of carbides is crucial to the approach, as carbide formation can decrease both ductility and corrosion resistance. Films with 0, 6, and 11 at.% C were deposited by magnetron co-sputtering, using a graphite target and a sintered compound target. The samples with 0 at.% C crystallized with a mixture of a cubic closed packed (ccp) phase and the intermetallic χ-phase. With 6 and 11 at.% C, the films were amorphous and homogenous down to the nm-scale. The hardness of the films increased from 8 GPa in the carbon-free film to 16 GPa in the film with 11 at.% C. Furthermore, the carbon significantly improved the crack resistance as shown in fragmentation tests, where the crack density was strongly reduced. The changes in mechanical properties were primarily attributed to the shift from crystalline to amorphous. Lastly, the carbon improved the corrosion resistance by a progressive lowering of the corrosion current and the passive current with increasing carbon concentration. |
| first_indexed | 2024-12-16T09:25:15Z |
| format | Article |
| id | doaj.art-5915e28ec67143abacbc4cc6acd10229 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-16T09:25:15Z |
| publishDate | 2021-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-5915e28ec67143abacbc4cc6acd102292022-12-21T22:36:40ZengElsevierMaterials & Design0264-12752021-07-01205109711Enhancing corrosion resistance, hardness, and crack resistance in magnetron sputtered high entropy CoCrFeMnNi coatings by adding carbonLeón Zendejas Medina0Marcus V. Tavares da Costa1E. Maria Paschalidou2Greta Lindwall3Lars Riekehr4Marcus Korvela5Stefan Fritze6Szilárd Kolozsvári7E. Kristofer Gamstedt8Leif Nyholm9Ulf Jansson10Uppsala University, Department of Chemistry – Ångström Laboratory, Uppsala University, Box 538, SE-751 21 Uppsala, Sweden; Corresponding author: Department of Chemistry – Ångström Laboratory, Uppsala University, Box 538, SE-751 21 Uppsala, Sweden.Uppsala University, Division of Applied Mechanics, Department of Materials Science and Engineering, Box 534, SE-751 21 Uppsala, SwedenUppsala University, Department of Chemistry – Ångström Laboratory, Uppsala University, Box 538, SE-751 21 Uppsala, SwedenRoyal Institute of Technology (KTH), Department of Material Science and Engineering, Brinellvägen 23, SE-100 44 Stockholm, SwedenUppsala University, Department of Chemistry – Ångström Laboratory, Uppsala University, Box 538, SE-751 21 Uppsala, SwedenUppsala University, Analytical Chemistry, Department of Chemistry – BMC, Box 599, SE-751 24 Uppsala, SwedenUppsala University, Department of Chemistry – Ångström Laboratory, Uppsala University, Box 538, SE-751 21 Uppsala, SwedenPlansee Composite Materials GmbH Siebenbürgerstraße 23, DE-86983 Lechbruck am See, GermanyUppsala University, Division of Applied Mechanics, Department of Materials Science and Engineering, Box 534, SE-751 21 Uppsala, SwedenUppsala University, Department of Chemistry – Ångström Laboratory, Uppsala University, Box 538, SE-751 21 Uppsala, SwedenUppsala University, Department of Chemistry – Ångström Laboratory, Uppsala University, Box 538, SE-751 21 Uppsala, SwedenThis study explores carbon addition as a materials design approach for simultaneously improving the hardness, crack resistance, and corrosion resistance of high entropy thin films. CoCrFeMnNi was selected as a starting point, due to its high concentration of weak carbide formers. The suppression of carbides is crucial to the approach, as carbide formation can decrease both ductility and corrosion resistance. Films with 0, 6, and 11 at.% C were deposited by magnetron co-sputtering, using a graphite target and a sintered compound target. The samples with 0 at.% C crystallized with a mixture of a cubic closed packed (ccp) phase and the intermetallic χ-phase. With 6 and 11 at.% C, the films were amorphous and homogenous down to the nm-scale. The hardness of the films increased from 8 GPa in the carbon-free film to 16 GPa in the film with 11 at.% C. Furthermore, the carbon significantly improved the crack resistance as shown in fragmentation tests, where the crack density was strongly reduced. The changes in mechanical properties were primarily attributed to the shift from crystalline to amorphous. Lastly, the carbon improved the corrosion resistance by a progressive lowering of the corrosion current and the passive current with increasing carbon concentration.http://www.sciencedirect.com/science/article/pii/S026412752100263XThin filmMagnetron sputteringCorrosionFragmentation testAmorphous alloysBipolar plate |
| spellingShingle | León Zendejas Medina Marcus V. Tavares da Costa E. Maria Paschalidou Greta Lindwall Lars Riekehr Marcus Korvela Stefan Fritze Szilárd Kolozsvári E. Kristofer Gamstedt Leif Nyholm Ulf Jansson Enhancing corrosion resistance, hardness, and crack resistance in magnetron sputtered high entropy CoCrFeMnNi coatings by adding carbon Materials & Design Thin film Magnetron sputtering Corrosion Fragmentation test Amorphous alloys Bipolar plate |
| title | Enhancing corrosion resistance, hardness, and crack resistance in magnetron sputtered high entropy CoCrFeMnNi coatings by adding carbon |
| title_full | Enhancing corrosion resistance, hardness, and crack resistance in magnetron sputtered high entropy CoCrFeMnNi coatings by adding carbon |
| title_fullStr | Enhancing corrosion resistance, hardness, and crack resistance in magnetron sputtered high entropy CoCrFeMnNi coatings by adding carbon |
| title_full_unstemmed | Enhancing corrosion resistance, hardness, and crack resistance in magnetron sputtered high entropy CoCrFeMnNi coatings by adding carbon |
| title_short | Enhancing corrosion resistance, hardness, and crack resistance in magnetron sputtered high entropy CoCrFeMnNi coatings by adding carbon |
| title_sort | enhancing corrosion resistance hardness and crack resistance in magnetron sputtered high entropy cocrfemnni coatings by adding carbon |
| topic | Thin film Magnetron sputtering Corrosion Fragmentation test Amorphous alloys Bipolar plate |
| url | http://www.sciencedirect.com/science/article/pii/S026412752100263X |
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