| Texto completo | |
| Autor(es): |
Monfardini, Warlen Alves
;
Soyama, Juliano
Número total de Autores: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 28, p. 6-pg., 2025-01-01. |
| Resumo | |
One of the most effective approaches for the densification of titanium aluminides processed by powder metallurgy involves the addition of elements that induce the formation of a liquid phase during sintering. This work investigated the sintering behavior and creep resistance of Ti-45Al (in at.%) with ternary Co or Ni additions. Conventional sintering under a high vacuum atmosphere led to densifications of approximately 90% of the theoretical density in the Ti-45Al-2Co and Ti-45Al-2Ni alloys, while binary Ti-45Al was limited to a maximum of 57%. Microstructural analysis revealed the formation of equilibrium intermetallics gamma-TiAl and alpha 2-Ti3Al, along with Ni- and Co-rich regions concentrated at the boundaries of primary particles. Compression creep tests at 800 degrees C under a 120 MPa load demonstrated a significant increase in mechanical strength, especially with the addition of Co, which showed 1% of plastic deformation in approximately 18 hours. (AU) | |
| Processo FAPESP: | 18/18293-8 - Ligas de titânio: transformações de fases e manufatura aditiva aplicadas na obtenção de materiais com gradientes funcionais |
| Beneficiário: | Rubens Caram Junior |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 18/04564-0 - Aluminetos de titânio processados via metalurgia do pó |
| Beneficiário: | Juliano Soyama |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 20/04177-6 - Sinterização de aluminetos de titânio com adição de Co e Ni |
| Beneficiário: | Lorenzo Quaglio |
| Modalidade de apoio: | Bolsas no Brasil - Iniciação Científica |