| Texto completo | |
| Autor(es): |
Goncalves, Vinicius Richieri Manso
;
Correa, Diego Rafael Nespeque
;
Sousa, Tiago dos Santos Pereira de
;
Pinta, Carlos Alberto Fonzar
;
Grandini, Carlos Roberto
;
Afonso, Conrado Ramos Moreira
;
Lisboa-Filho, Paulo Noronha
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T; v. 30, p. 11-pg., 2024-03-23. |
| Resumo | |
Despite beta-type Ti alloys achieving a low elastic modulus, metallic implants generally exhibit poor wear resistance. To address this issue, in-situ Ti-based matrix composites (TMCs) are considered due to their strong bonding at the matrix/reinforcement interface. While TiC particles and TiB whiskers are common reinforcements for insitu TMCs, limited research combines their effects with the low elastic modulus of Ti alloys. Here, we present a novel approach using arc-melting on Ti-40Nb alloy with 5 vol% additions of NbC, NbB2, and B4C. Respectively, three TMCs were obtained with the beta-type Ti-Nb matrices reinforced individually with TiC particles, TiB whiskers, and hybridized with both. The produced TMCs exhibited the same passive behavior of the unreinforced Ti-40Nb alloy. However, tribocorrosion resistances were improved, as TMCs achieved nobler potentials during sliding than the unreinforced alloy (-0.5 and -0.9 V, respectively). Notably, the TiB-reinforced and the hybrid reinforced TMCs displayed minimal wear damage, while the TiC-reinforced TMC achieved a remarkable low elastic modulus of approximately 73 GPa. This study introduces promising alternatives for wear-resistant loadbearing implant applications. (AU) | |
| Processo FAPESP: | 18/00746-6 - Desenvolvimento e caracterização de compósitos in-situ de matriz de Ti-Nb para aplicação biomédica |
| Beneficiário: | Vinícius Richieri Manso Gonçalves |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |
| Processo FAPESP: | 15/50280-5 - Desenvolvimento de superfícies híbridas biofuncionalizadas resistentes à tribo-corrosão em ligas à base de Ti |
| Beneficiário: | Carlos Roberto Grandini |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |