Table 1
Summary of the diffusion couples made in [11].
| Workpiece material | Tool material | Pressure | Dwell time (min) | Temperature (°C) | Notable outcome | Characterisation included in this paper. |
|---|---|---|---|---|---|---|
| Ti-64 | H13A | ∼0 pressure | 120 | 800, 1000, 1200 | Only the 1000 °C sample formed a diffusion bond, showing a complex intermediate layer with small voids in the adjacent Co layer. | SEM and X-EDS for the 1000 °C sample |
| Ti-5553 | H13A | ∼0 pressure | 120 | 800, 1000, 1200 | The experiment was highly unreliable with poor bonding in most samples. | None |
| Ti-5553 | H13A | 35 MPa | 120 | 1000 | Voids and cavities <1 μm were present in the probable eta-phase binder. | SEM and X-EDS |
| Ti-64 | H13A | 850 MPa | 120 | 800, 1000, 1200 | At 1200 °C and 1000 °C, voids were found in the bcc-W layer. The 800 °C sample had a poor diffusion bond. | SEM and X-EDS for the 1200 °C sample. |
| Ti-5553 | H13A | 850 MPa | 120 | 800, 1000, 1200 | At 1200 °C, voids <0.1 μm were observed in the bcc-W layer. The 1000 °C sample had cracks and no pronounced diffusion bond. The 800 °C sample had a poor diffusion bond. | None |
| Ti-64 | H13A | 2.5 GPa | 10 | 1200 | Voids <0.5μm were observed along the interface in the probable eta-phase binder. | SEM |
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