Brazing ZrO{sub 2} ceramic to Ti–6Al–4V alloy using NiCrSiB amorphous filler foil: Interfacial microstructure and joint properties

Journal Article · Mon Jul 15 00:00:00 EDT 2013 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2013.04.009· OSTI ID:22285058

Cao, J., E-mail: [e-mail] ^[1]; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001 ^[2]; Song, X.G., E-mail: [e-mail] ^[1]; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001 ^[2]; Li, C., E-mail: [e-mail] ^[3]; Zhao, L.Y., E-mail: [e-mail] ^[3]; Feng, J.C., E-mail: [e-mail] ^[1]; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001 ^[2]

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1. Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai 264209 (China)
2. (China)
3. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001 (China)

Reliable brazing of ZrO{sub 2} ceramic and Ti–6Al–4V alloy was achieved using NiCrSiB amorphous filler foil. The interfacial microstructure of ZrO{sub 2}/Ti–6Al–4V joints was characterized by scanning electron microscope, energy dispersive spectrometer and micro-focused X-ray diffractometer. The effects of brazing temperature on the interfacial microstructure and joining properties of brazed joints were investigated in detail. Active Ti of Ti–6Al–4V alloy dissolved into molten filler metal and reacted with ZrO{sub 2} ceramic to form a continuous TiO reaction layer, which played an important role in brazing. Various reaction phases including Ti{sub 2}Ni, Ti{sub 5}Si{sub 3} and β-Ti were formed in brazed joints. With an increasing of brazing temperature, the TiO layer thickened gradually while the Ti{sub 2}Ni amount reduced. Shear test indicated that brazed joints tend to fracture at the interface between ZrO{sub 2} ceramic and brazing seam or Ti{sub 2}Ni intermetallic layer. The maximum average shear strength reached 284.6 MPa when brazed at 1025 °C for 10 min. - Graphical Abstract: Interfacial microstructure of ZrO{sub 2}/TC4 joint brazed using NiCrSiB amorphous filler foil was: ZrO{sub 2}/TiO/Ti{sub 2}Ni + β-Ti + Ti{sub 5}Si{sub 3}/β-Ti/Widmanstätten structure/TC4. - Highlights: • Brazing of ZrO{sub 2} ceramic and Ti-6Al-4V alloy was achieved. • Interfacial microstructure was TiO/Ti{sub 2}Ni + β + Ti{sub 5}Si{sub 3}/β/Widmanstätten structure. • The formation of TiO produced the darkening effect of ZrO{sub 2} ceramic. • The highest joining strength of 284.6MPa was obtained.

• OSTI ID: 22285058
• Journal Information: Materials Characterization, Vol. 81; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BRAZED JOINTS
BRAZING
CERAMICS
FILLER METALS
FOILS
FRACTURES
LAYERS
MICROSTRUCTURE
PRESSURE RANGE MEGA PA 100-1000
SHEAR PROPERTIES
TITANIUM ALLOYS
TITANIUM OXIDES
TITANIUM SILICIDES
ZIRCONIUM OXIDES