Microstructure and oxidation resistance of mechanically alloyed and sintered Ni-Nb and Ni-Nb-Ta alloys (2017)
- Authors:
- USP affiliated authors: COELHO, GILBERTO CARVALHO - EEL ; FERREIRA, LUCAS MOREIRA - EEL
- Unidade: EEL
- DOI: 10.4028/www.scientific.net/MSF.899.19
- Subjects: LIGAS METÁLICAS; NIÓBIO; SINTERIZAÇÃO
- Language: Inglês
- Abstract: The present work reports on the microstructure and oxidation resistance of Ni-25Nb, Ni-20Nb-5Ta and Ni-15Nb-10Ta alloys produced by high-energy ball milling and subsequent sintering. The sintered samples were characterized by optical microscopy, scanning electron microscopy, X-ray diffraction, energy dispersive spectrometry, and static oxidation tests. Homogeneous microstructures of the binary and ternary alloys indicated the major presence of the β-Ni3Nb compound as matrix, which dissolved large amounts of tantalum. Consequently, the β-Ni3Nb peaks moved toward the direction of smaller diffraction angles. Iron contamination lower than 6.7 at.-% was detected by EDS analysis, which were picked-up during the previous ball milling process. After the static oxidation tests (1100°C for 4 h) the sintered Ni-25Nb, Ni-20Nb-5Ta and Ni-15Nb-10Ta alloys presented mass gains of 31.5%, 30.5% and 28.8%, respectively. Despite the higher densification of the Ni-15Nb-10Ta alloy, the results suggested that the tantalum addition contributed to improve the oxidation resistance of the β-Ni3Nb compound.
- Imprenta:
- Publisher place: Pfaffikon, Switzerland
- Date published: 2017
- Source:
- Título: Materials Science Forum (Online)
- ISSN: 1662-9752
- Volume/Número/Paginação/Ano: v.899, p.19-24, 2017
- Conference titles: International Latin American Conference on Powder Technology
- Este periódico é de assinatura
- Este artigo NÃO é de acesso aberto
- Cor do Acesso Aberto: closed
-
ABNT
FERREIRA, Lucas et al. Microstructure and oxidation resistance of mechanically alloyed and sintered Ni-Nb and Ni-Nb-Ta alloys. Materials Science Forum (Online). Pfaffikon, Switzerland: Escola de Engenharia de Lorena, Universidade de São Paulo. Disponível em: https://doi.org/10.4028/www.scientific.net/MSF.899.19. Acesso em: 31 dez. 2025. , 2017 -
APA
Ferreira, L., Rezende, S. C., Silva, A. A. A. P., Poirier, G. Y., COELHO, G. C., & Ramos, A. S. (2017). Microstructure and oxidation resistance of mechanically alloyed and sintered Ni-Nb and Ni-Nb-Ta alloys. Materials Science Forum (Online). Pfaffikon, Switzerland: Escola de Engenharia de Lorena, Universidade de São Paulo. doi:10.4028/www.scientific.net/MSF.899.19 -
NLM
Ferreira L, Rezende SC, Silva AAAP, Poirier GY, COELHO GC, Ramos AS. Microstructure and oxidation resistance of mechanically alloyed and sintered Ni-Nb and Ni-Nb-Ta alloys [Internet]. Materials Science Forum (Online). 2017 ;899 19-24.[citado 2025 dez. 31 ] Available from: https://doi.org/10.4028/www.scientific.net/MSF.899.19 -
Vancouver
Ferreira L, Rezende SC, Silva AAAP, Poirier GY, COELHO GC, Ramos AS. Microstructure and oxidation resistance of mechanically alloyed and sintered Ni-Nb and Ni-Nb-Ta alloys [Internet]. Materials Science Forum (Online). 2017 ;899 19-24.[citado 2025 dez. 31 ] Available from: https://doi.org/10.4028/www.scientific.net/MSF.899.19 - Mechanical Alloying and Sintering of Ni-Sn and Ni-Mg Powder Mixtures
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Informações sobre o DOI: 10.4028/www.scientific.net/MSF.899.19 (Fonte: oaDOI API)
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