| Title | Production, bonding strength and electrochemical behaviour of commercially pure Ti/Al 2O
3 brazed joints
|
| Publication Type | Journal Article |
| 1997 |
| Authors | Paiva, OC, Barbosa, MA |
| Journal | Journal of Materials ScienceJ Mater Sci |
| Volume | 32 |
| Issue | 3 |
| Pagination | 653 - 659 |
| Date Published | 1997/// |
| 00222461 (ISSN) |
| Agents, Aluminum compounds, Aluminum trioxide, Bond strength (materials), Bonding, Brazed joints, Brazing, Brazing alloys, Corrosion resistance, Energy dispersive spectroscopy, Interfaces (materials), Joints (structural components), Scanning electron microscopy, Silver alloys, Strength of materials, Titanium, Titanium compounds, Titanium hydride |
| The brazing of commercially pure titanium to Al 2O
3 has been studied. Two different brazing alloys within the Ag-Cu-Ti system and pure silver were selected as bonding agents. Titanium hydride (TiH
2) additions were also tested, with the aim of improving the wetting of the ceramic surface by the melted brazing alloy. The mechanical and electrochemical behaviour of the produced joints was assessed, and related to chemical and morphological features resulting from an analysis by scanning electron microscopy and energy dispersive spectroscopy. It was possible to produce joints presenting high integrity, good strength and high resistance to corrosion. The best results were obtained when using an Ag-26Cu-3Ti brazing alloy. The addition of TiH
2 increased the mechanical properties, leading to a maximum bonding strength of 80 ± 8 MPa, as determined in three-point bending tests. In most of the cases, for a maximum deflection of 5 mm, there was only a partial detachment of the ceramic/metal joints. The lowest values for the corrosion rates (i
corr = 1.38 μA cm
|
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