Strengthening of Ti[sbnd]Nb alloys surfaces by plasma nitriding

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual de Ponta Grossa (UEPG)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorValadão, Guilherme M.-
Autor(es): dc.creatorGonsalves, Silvio H.-
Autor(es): dc.creatorGrandini, Carlos R.-
Autor(es): dc.creatorde Souza, Gelson B.-
Data de aceite: dc.date.accessioned2025-08-21T23:41:25Z-
Data de disponibilização: dc.date.available2025-08-21T23:41:25Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2025-01-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.surfcoat.2024.131723-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/308438-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/308438-
Descrição: dc.descriptionTiNb-based alloys are needed as mechanically biocompatible materials, despite having low wear resistance. This topic, not yet well-researched, is being addressed here. Titanium‑niobium alloys with 10, 25 and 35 Nb wt% were DC plasma nitrided at temperatures 600–900 °C. Originally, they featured distinct balances of α, β and α” phases. To probe the heating effects on the bulks, the alloys were thermally treated (TT) at the same nitriding temperatures. They disclose a strong structural and microstructural dependence with the nitriding temperatures and niobium fractions, which intricately rule the mechanical properties of both bulks and layer/substrate systems. The nitriding produces ∼1 μm thick nitride layers (TiN, Ti2N) at top surfaces, with high hardness (H) and elastic modulus (E). Beneath lie β-rich regions, spread over 20–50 μm thick layers, with embedded αN precipitates whose size vary inversely with the Nb wt% and heating conditions. These layers formation involve a competing effect between N and Nb, which are α and β stabilizers, respectively. The nitrided Ti10Nb present the highest variations compared to TT substrates: H ∼ 16 GPa (4.7×) and E ∼ 230 GPa (91 %). The H/E ratio, an indicative of tribological resistance, increases in all the nitrided surfaces, while it diminishes in the TT bulks. The overall conclusion is that parameters must be carefully chosen for each Ti[sbnd]Nb composition. However, under the requirements of low-modulus bulks and wear protective cases for use in bone prostheses, plasma nitridings must be carried out at temperatures near Tβ. The Ti25Nb nitrided at 700 °C meets these criteria best.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionFinanciadora de Estudos e Projetos-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionDepartment of Physics Universidade Estadual de Ponta Grossa, PR-
Descrição: dc.descriptionDepartment of Physics and Meteorology UNESP - Universidade Estadual Paulista, SP-
Descrição: dc.descriptionDepartment of Physics and Meteorology UNESP - Universidade Estadual Paulista, SP-
Descrição: dc.descriptionCAPES: 001-
Descrição: dc.descriptionFinanciadora de Estudos e Projetos: 0122/21-
Descrição: dc.descriptionCNPq: 306779/2021-8-
Descrição: dc.descriptionCNPq: 314.810/2021-8-
Descrição: dc.descriptionCNPq: 421.677/2023-6-
Idioma: dc.languageen-
Relação: dc.relationSurface and Coatings Technology-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectGlow discharge-
Palavras-chave: dc.subjectMartensite-
Palavras-chave: dc.subjectNanoindentation-
Palavras-chave: dc.subjectNitrogen solid solution-
Palavras-chave: dc.subjectOmega phase-
Título: dc.titleStrengthening of Ti[sbnd]Nb alloys surfaces by plasma nitriding-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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