Preparation and characterization of novel Ti(Al)–TiB2/Ti3Al metallic-intermetallic laminated composites. (April 2020)

• Record Type: Journal Article
• Authors: Zhang, Tongtong; Wang, Guodong; Shu, Ying; Fan, Guohua; Ni, Peitong; Geng, Lin
• Is Part Of: Vacuum. Volume 174(2020)
• Publication Date: 2020-04
• Subjects: Ti3Al -- Laminated structure -- Reaction annealing -- Microstructure -- Mechanical properties; Vacuum -- Periodicals; 621.55
• DOI: 10.1016/j.vacuum.2020.109217
• Languages: English
• ISSNs: 0042-207X

Abstract

Abstract: In this paper, we designed and prepared Ti(Al)–TiB2 /Ti3 Al laminated composites consisting of alternating Ti(Al) layers and TiB2 /Ti3 Al layers, which were realized by using Ti foils and TiB2 /Al composite foils as raw materials, stacking, and reaction annealing. Phase transformation and microstructure evolution of laminated composites during reaction annealing were systematically investigated by means of optical microscope (OM), scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction (XRD). Formation mechanism of laminated structure was elucidated in details. The results showed that Ti(Al)–TiB2 /Ti3 Al laminated composites exhibited a significant increase in ductility while maintaining or even improving the tensile strength, in comparison with monolithic Ti3 Al. It is expected that the design strategy can be extended to other brittle intermetallic compounds, such as Ni–Al and Fe–Al systems. Highlights: The Ti(Al)–TiB2 /Ti3 Al laminated composites have been fabricated by reaction synthesis. The microstructure evolution of laminated composites was explored. The performance can be further advanced by tailoring foil thicknesses and the contents of particles.