Abstract
This study aimed at investigating the influence of the processing conditions on the mechanical properties of hot pressed compacts of a CoCrMo biomedical alloy.Several hot pressed CoCrMo compacts were processed in vacuum (10-2mbar), at a pressure of 60MPa with different temperatures (900°C, 1000°C and 1100°C) and different times (10min, 30min and 60min). Compacts were examined by SEM/EDS. The transverse rupture strength, Young's Moduli and hardness were determined. The fracture surface of compacts were also examined.The compacts hot pressed at 900. °C exhibited lower TRS than those processed at 1000. °C and 1100. °C, which showed similar strength values, regardless the sintering time. The 900. °C compacts showed also lower YM and higher porosity. Lower hardness values were registered for 900. °C compacts while 1000. °C compacts exhibited the highest values. The fracture surface analyses revealed fragile fracture for 900. °C compacts (10. min and 30. min) and 1000. °C (10. min). The remaining compacts exhibited ductile fracture.A full characterization of the mechanical properties of hot pressed CoCrMo compacts has been made and the selection of the processing parameters according to the desired mechanical properties is now possible.
| Original language | English |
|---|---|
| Pages (from-to) | 829-834 |
| Number of pages | 6 |
| Journal | Materials and Design |
| Volume | 83 |
| DOIs | |
| Publication status | Published - 15 Oct 2015 |
| Externally published | Yes |
Keywords
- Biomedical applications
- CoCrMo alloy
- Hot pressing
- Mechanical properties