Microstructural Characterization of Diffusion Bonds Assisted by Ni/Ti Nanolayers

• Tipo: Artigo em Revista Científica Internacional
• Data: 2016

Autores

Simoes, S (Autor) FEUP; Filomena Viana (Autor) FEUP; Sofia Ramos, A (Autor) Outra; Teresa Vieira, M (Autor) Outra; Vieira, MF (Autor) FEUP

Revista

Título: Journal of Materials Engineering and Performance

Vol. 25 Nº 8

Páginas: 3245-3251

ISSN: 1059-9495

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 7 Citações

Scopus - 6 Citações

Classificação Científica

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia de materiais

FOS: Ciências da engenharia e tecnologias > Engenharia dos materiais

Outras Informações

ID Authenticus: P-00K-G8J

DOI: 10.1007/s11665-016-2135-z

Abstract (EN): The microstructure of similar and dissimilar diffusion bonds of metallic materials using reactive Ni/Ti interlayers was studied in this investigation. The base material surfaces were modified by sputter deposition of alternated Ni and Ti nanolayers. These nanolayers increase the diffusivity at the interface, enhancing the bonding process. Bonding experiments were performed at 800 A degrees C under a pressure of 10 MPa with a bonding time of 60 min. The reaction zone was characterized by high-resolution scanning and transmission electron microscopies. Microstructural characterization reveals that similar (NiTi to NiTi and TiAl to TiAl) and dissimilar (NiTi to Ti6Al4V and TiAl to stainless steel) joints can be obtained successfully with Ni/Ti reactive nanolayers. The interfaces are thin (< 10 A mu m) and their microstructure (thickness and number of zones, size and shape of the grains) depends on the elements diffusing from the base materials. For all joints, the interface is mainly composed of equiaxed grains of NiTi and NiTi2.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7