کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
829419 1470341 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Diffusion bonding of TiAl intermetallic and Ti3AlC2 ceramic: Interfacial microstructure and joining properties
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Diffusion bonding of TiAl intermetallic and Ti3AlC2 ceramic: Interfacial microstructure and joining properties
چکیده انگلیسی


• TiAl intermetallic and Ti3AlC2 ceramic were diffusion bonded.
• Interfacial microstructure of diffusion bonded joints was clarified.
• Nanoindentation test was conducted to understand the performance of the reaction products.
• The highest shear strength reached 151.6 MPa by the joints bonded at 920 °C for 60 min.

TiAl intermetallics and Ti3AlC2 ceramics were jointed through diffusion bonding using Ti/Ni interlayer. The effect of bonding temperature and holding time on interfacial microstructure and mechanical properties of the bonded joints were investigated. The typical interfacial microstructure of the joint from TiAl to Ti3AlC2 side could be divided into τ3-Al3NiTi2, α2-Ti3Al, α-Ti + δ-Ti2Ni, δ-Ti2Ni, β2-TiNi, η-TiNi3, γ-(Ni)ss, γ′-Ni3(Al, Ti), γ′-Ni3(Al, Ti) + Ti3AlC2, respectively. The value of the microhardness in the reactive zones increased due to the formation of intermetallcs. Lower or higher bonding temperature and longer or shorter holding time both resulted in low strength owing to the insufficient diffusion of atoms or excessive formation of intermetallics. A high bonding strength can be obtained when bonding at 920 °C for 60 min. Fracture occurred through the intermetallic layer adjacent to the Ti3AlC2 substrate during shear test, showing brittle intergranular and transgranular characteristic.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials & Design - Volume 56, April 2014, Pages 115–121
نویسندگان
, , , , ,