| Autor: |
Kelvin Y. Xie, Bernard Gaskey, William M. Buchta, Michael C. Brupbacher, Ian McCue, Alyssa Chuang, Jonah Erlebacher, Winson C. H. Kuo |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
SSRN Electronic Journal. |
| ISSN: |
1556-5068 |
| Popis: |
We present a new dealloying-based technique to form fully-dense and high-hardness metal composite coatings. By depositing then heat treating a TiCr alloy coating on a Ni-base superalloy, a eutectic reaction occurs at the coating/substrate interface, which drives spontaneous pattern formation in both alloys analogous to liquid metal dealloying. The coating exhibits a significantly higher hardness (15 GPa) than both the starting alloy (3.7 GPa) and precursor coating (6 GPa), measured by micro- and nanoindentation, while maintaining the ability to plastically deform during micro-indentation experiments without apparent cracking or spallation. The flexibility and scalability of the dealloying process used here demonstrates a promising route towards protective coatings for structural alloys. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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