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Joining of SiO2f/SiO2composite to Al2O3ceramic using AgCu-Ti brazing filler metal
- Source :
- Welding in the World; January 2017, Vol. 61 Issue: 1 p181-186, 6p
- Publication Year :
- 2017
-
Abstract
- SiO2f/SiO2composite was joined to Al2O3ceramic using AgCu-Ti active filler at brazing temperature of 1153 K for 10 and 60 min, respectively, and sound joints were achieved. It was found that a thin reaction layer had been formed close to each of the joined materials, and the brazing seam matrix was composed of homogeneous Ag-Cu eutectic alloy. The joint interface was analyzed by SEM, EDS, and XRD. The typical interface structure of joint brazed at 1153 K for 10 min could be described as the following sequence: SiO2f/SiO2→ TiO2+ Ti5Si4→ TiO2+ Cu3Ti3O → Ag-Cu eutectic alloy → (Ti-O) + (Ti-Cu-O) → Al2O3. However, Cu2Ti4O but not Cu3Ti3O was detected in the joints brazed at 1153 K for 60 min. Besides, the reaction layers of joint brazed at 1153 K for 60 min were much thicker than those for 10 min. The SiO2f/SiO2-Al2O3joints brazed at 1153 K for 10 min showed an average shear strength of 38.6 MPa, evidently higher than that (26.0MPa) brazed at 1153 K for 60 min.
Details
- Language :
- English
- ISSN :
- 00432288 and 18786669
- Volume :
- 61
- Issue :
- 1
- Database :
- Supplemental Index
- Journal :
- Welding in the World
- Publication Type :
- Periodical
- Accession number :
- ejs40408173
- Full Text :
- https://doi.org/10.1007/s40194-016-0389-6