Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/80012
Título: | Improved tribocorrosion behavior obtained by in-situ precipitation of Ti2C in Ti-Nb alloy |
Autor(es): | Gonçalves, Vinícius Richieri Manso Çaha, Ihsan Alves, Alexandra Manuela Vieira Cruz Pinto Toptan, Fatih Rocha, Luís Augusto |
Palavras-chave: | Ti-based composites Niobium carbide Powder metallurgy Tribocorrosion |
Data: | 26-Mai-2022 |
Editora: | Multidisciplinary Digital Publishing Institute (MDPI) |
Revista: | Metals |
Citação: | Gonçalves, V.R.M.; Çaha, I.; Alves, A.C.; Toptan, F.; Rocha, L.A. Improved Tribocorrosion Behavior Obtained by In-Situ Precipitation of Ti2C in Ti-Nb Alloy. Metals 2022, 12, 908. https://doi.org/10.3390/met12060908 |
Resumo(s): | Novel in-situ Ti-based matrix composites (TMCs) were developed through the reactive hot pressing of Ti + NbC powder blends. Due to the chemical reaction that occurred in the solid-state during processing, the produced samples were composed of an Nb-rich β-Ti phase that formed a metallic matrix along with Ti<sub>2</sub>C as a reinforcing phase. By employing different proportions of Ti:NbC, the phase composition of the alloys was designed to contain different ratios of α-Ti and β-Ti. The present work investigated the corrosion and tribocorrosion behavior of the composites, compared to unreinforced Ti, in a phosphate-buffered solution (PBS) at body temperature. Corrosion tests included potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Tribocorrosion tests were carried out using a ball-on-plate tribometer with sliding performed at open circuit potential (OCP) and under anodic potentiostatic conditions. Results showed that the stabilization of the β phase in the matrix led to a decrease in the hardness. However, the formation of the in-situ reinforcing phase significantly improved the tribocorrosion behavior of the composites due to a load-carrying effect, lowering the corrosion tendency and kinetics under sliding. Furthermore, localized corrosion was not observed at the interface between the reinforcing phase and the matrix. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/80012 |
DOI: | 10.3390/met12060908 |
e-ISSN: | 2075-4701 |
Versão da editora: | https://www.mdpi.com/2075-4701/12/6/908 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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metals-12-00908-v2.pdf | 4,97 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons