Microstructural analysis and mechanical properties of in situ Nb/Nb-aluminide layered materials

✍ Scribed by Dong-Seok Chung; Manabu Enoki; Teruo Kishi

• Publisher: Institute of Physics and National Institute of Materials Science
• Year: 2002
• Tongue: English
• Weight: 313 KB
• Volume: 3
• Category: Article
• ISSN: 1468-6996
• DOI: 10.1016/s1468-6996(02)00007-4

✦ Synopsis

Thin foil hot press process has been developed for manufacturing metal/intermetallic compound laminate composites to induce selfpropagating high-temperature synthesis (SHS) reaction between different pure metal sheets. In the present work, Nb/Nb-aluminide laminate composites were manufactured with pure Nb and Al sheets, which consist of ®ne Nb/Nb 2 Al/NbAl 3 or Nb/Nb 3 Al/Nb 2 Al/NbAl 3 layer structure. Microvickers hardness test and energy dispersive X-ray spectroscopy (EDS) analysis in the intermetallic compound layer demonstrate the formation of various phases, and the microvickers hardness values decrease with increasing Al/Nb atomic ratio. Although the tensile strength of laminate composites is similar to pure Nb, ductility and fracture toughness are signi®cantly improved due to plastic deformation in Nb layer.