Spark plasma sintered W, Ti6Al4V, Cu containing Nb-based alloys representing a new generation for high-temperature applications
Novel spark plasma sintering (SPS) of W–Ti–Al–V–Cu containing Nb-based alloys, representing a new generation of refractory materials, are novel candidates for structural applications. Ni superalloys are currently used at temperatures close to their melting point. Therefore, a novel generation of ref...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-11-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S223878542201585X |
| _version_ | 1828090146398928896 |
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| author | Alexandre Candido Soares Yara Daniel Ribeiro Michel Picanço Oliveira Márcia Giardinieri de Azevedo Bárbara Ferreira de Oliveira Artur Camposo Pereira Sergio Neves Monteiro |
| author_facet | Alexandre Candido Soares Yara Daniel Ribeiro Michel Picanço Oliveira Márcia Giardinieri de Azevedo Bárbara Ferreira de Oliveira Artur Camposo Pereira Sergio Neves Monteiro |
| author_sort | Alexandre Candido Soares |
| collection | DOAJ |
| description | Novel spark plasma sintering (SPS) of W–Ti–Al–V–Cu containing Nb-based alloys, representing a new generation of refractory materials, are novel candidates for structural applications. Ni superalloys are currently used at temperatures close to their melting point. Therefore, a novel generation of refractory alloys is being applied at even higher temperatures. When compared to other refractory metals for applications in higher temperature environments, Nb-based alloys have shown great prominence owing to higher melting point. However, their applications have not yet been widely implemented. Indeed, there is a lack of research which might improve some restrictive aspects of Nb alloys, such as low temperature oxidation resistance as well as poor fracture toughness and ductility. To fill this gap, novel alloys with composition Nb-xW-15(Ti6Al4V)–1Cu (x = 5, 10 and 15 wt.%) were developed via SPS at 1400 and 1500 °C (with and without pre-compression). The alloys microstructure, density, hardness and oxidation resistance were characterized. X-ray diffraction and energy dispersive spectroscopy microanalysis confirmed the formation of Nb, Ti and W solid phases solution, as well as intermetallic, AlTi3, TiO2 and TiC compounds. The highest densification (97.5%) was obtained in the alloy with the highest content of 15 wt.% W sintered at 1500 °C and pre-compressed. Despite a lower hardness, it exhibited a parabolic oxidation kinetics from the beginning of the oxidation test. This behavior was attributed to the higher amount of Nb2O5, which increased the oxidation resistance of the alloy. |
| first_indexed | 2024-04-11T05:53:37Z |
| format | Article |
| id | doaj.art-d281ac95e2d54ca9b4015cd470b15285 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-11T05:53:37Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-d281ac95e2d54ca9b4015cd470b152852022-12-22T04:42:00ZengElsevierJournal of Materials Research and Technology2238-78542022-11-012122622276Spark plasma sintered W, Ti6Al4V, Cu containing Nb-based alloys representing a new generation for high-temperature applicationsAlexandre Candido Soares0Yara Daniel Ribeiro1Michel Picanço Oliveira2Márcia Giardinieri de Azevedo3Bárbara Ferreira de Oliveira4Artur Camposo Pereira5Sergio Neves Monteiro6Forest and Wood Sciences Department, Federal University of Espírito Santo, Jeronimo Monteiro, 29550-000, BrazilForest and Wood Sciences Department, Federal University of Espírito Santo, Jeronimo Monteiro, 29550-000, BrazilForest and Wood Sciences Department, Federal University of Espírito Santo, Jeronimo Monteiro, 29550-000, BrazilAdvanced Materials Department, Darcy Ribeiro Northern Fluminense State University, Campos Dos Goytacazes, 28013-602, BrazilAdvanced Materials Department, Darcy Ribeiro Northern Fluminense State University, Campos Dos Goytacazes, 28013-602, BrazilMilitary Institute of Engineering—IME, Materials Science Program, Praça General Tibúrcio 80, Urca, Rio de Janeiro, 22290-270, BrazilMilitary Institute of Engineering—IME, Materials Science Program, Praça General Tibúrcio 80, Urca, Rio de Janeiro, 22290-270, Brazil; Corresponding author.Novel spark plasma sintering (SPS) of W–Ti–Al–V–Cu containing Nb-based alloys, representing a new generation of refractory materials, are novel candidates for structural applications. Ni superalloys are currently used at temperatures close to their melting point. Therefore, a novel generation of refractory alloys is being applied at even higher temperatures. When compared to other refractory metals for applications in higher temperature environments, Nb-based alloys have shown great prominence owing to higher melting point. However, their applications have not yet been widely implemented. Indeed, there is a lack of research which might improve some restrictive aspects of Nb alloys, such as low temperature oxidation resistance as well as poor fracture toughness and ductility. To fill this gap, novel alloys with composition Nb-xW-15(Ti6Al4V)–1Cu (x = 5, 10 and 15 wt.%) were developed via SPS at 1400 and 1500 °C (with and without pre-compression). The alloys microstructure, density, hardness and oxidation resistance were characterized. X-ray diffraction and energy dispersive spectroscopy microanalysis confirmed the formation of Nb, Ti and W solid phases solution, as well as intermetallic, AlTi3, TiO2 and TiC compounds. The highest densification (97.5%) was obtained in the alloy with the highest content of 15 wt.% W sintered at 1500 °C and pre-compressed. Despite a lower hardness, it exhibited a parabolic oxidation kinetics from the beginning of the oxidation test. This behavior was attributed to the higher amount of Nb2O5, which increased the oxidation resistance of the alloy.http://www.sciencedirect.com/science/article/pii/S223878542201585XNiobium alloysNb–W–Ti–Al–V–CuSpark plasma sinteringOxidation resistance |
| spellingShingle | Alexandre Candido Soares Yara Daniel Ribeiro Michel Picanço Oliveira Márcia Giardinieri de Azevedo Bárbara Ferreira de Oliveira Artur Camposo Pereira Sergio Neves Monteiro Spark plasma sintered W, Ti6Al4V, Cu containing Nb-based alloys representing a new generation for high-temperature applications Journal of Materials Research and Technology Niobium alloys Nb–W–Ti–Al–V–Cu Spark plasma sintering Oxidation resistance |
| title | Spark plasma sintered W, Ti6Al4V, Cu containing Nb-based alloys representing a new generation for high-temperature applications |
| title_full | Spark plasma sintered W, Ti6Al4V, Cu containing Nb-based alloys representing a new generation for high-temperature applications |
| title_fullStr | Spark plasma sintered W, Ti6Al4V, Cu containing Nb-based alloys representing a new generation for high-temperature applications |
| title_full_unstemmed | Spark plasma sintered W, Ti6Al4V, Cu containing Nb-based alloys representing a new generation for high-temperature applications |
| title_short | Spark plasma sintered W, Ti6Al4V, Cu containing Nb-based alloys representing a new generation for high-temperature applications |
| title_sort | spark plasma sintered w ti6al4v cu containing nb based alloys representing a new generation for high temperature applications |
| topic | Niobium alloys Nb–W–Ti–Al–V–Cu Spark plasma sintering Oxidation resistance |
| url | http://www.sciencedirect.com/science/article/pii/S223878542201585X |
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