Hot Isostatic Pressing
This technique involves sintering a compact at high temperature in a pressurised gas atmosphere. The compact must either be impermeable to the pressurising gas or be encapsulated in a gas-tight container.
In the former case, powder compacts are first sintered to remove surface connected porosity.
The use of hot isostatic pressing leads to additional densification and increased strength in Technox Zirconias.