High pressure sintering

At the beginning of the process, the green bodies to be sintered, made of metal or ceramic powder, are placed in the furnace chamber. The system is then evacuated to create a clean, oxygen-free atmosphere. The next optional step is debinding, where the temperature is precisely increased to the desired level at which the binder vaporizes from the green body. This is followed by sintering – either under vacuum, partial pressure, or atmospheric pressure at up to 2,100°C. During this phase, unwanted gases and impurities are removed from the material and the powder fuses at the grain boundaries, creating a dense body. 

After sintering, an inert gas (typically argon or nitrogen) is introduced into the chamber at up to 100 bar pressure. This pressure acts isostatically on the component, closing any remaining pores and further increasing density. During pressure sintering, the temperature usually remains constant to ensure the diffusion processes required for densification proceed efficiently. After the actual sintering process, pressure and temperature are reduced in a controlled manner. Our systems are equipped with rapid cooling systems to minimize cycle times and increase productivity.

What began as a further development of classic vacuum sintering is now a key process for the production of hardmetals, technical ceramics, and other high-performance materials. The increasing demands of modern applications – such as in the automotive, aerospace, or medical technology industries – require materials with the highest density, strength, and surface quality. Vacuum pressure sintering technology enables these requirements to be met by providing precise control of process parameters and flexible adaptation to different materials. Every new system undergoes extensive testing to ensure the highest quality and reliability in production. This applies both to pressure sintering technology and the entire product portfolio of PVA TePla.

• Precision: Advanced control and regulation systems enable exact process control and ensure uniform temperature distribution as well as reproducible material properties.
• Robustness: Durable furnace chambers made from high-quality materials such as steel/stainless steel and graphite for maximum process safety.
• Safety: Comprehensive safety equipment, including redundant pressure and temperature sensors and TÜV-certified safety systems for safe operation under high pressure.
• Flexibility: Modular design for customer-specific adaptation to materials, components, and production requirements.
• Support & Service: Comprehensive spare parts service, process consulting, and support for system optimization from a single source.

We use high-quality components and strict quality controls to ensure exceptional reliability and long service life. Our global service team supports you with maintenance, modifications, and upgrades – so you are always optimally equipped for the future.

To our service

For the production of standard and customer‑specific pressure vessels, components, and vacuum chambers, we operate our own manufacturing facility in Europe. It is entirely powered without the use of fossil fuels, fully aligning with our sustainability objectives.

Key advantages at a glance

• Fast delivery times: Greater independence from external suppliers
• Flexible customization: Short‑notice design changes can be implemented immediately.
• Reliable material availability: Constant access to high‑quality materials thanks to long‑standing local partnerships.
• Highest processing quality incl. standards: Performing welding operations in‑house allows direct monitoring of joint conformity, which is essential for meeting standards such as UNI EN ISO 3834.
• Top‑tier standards: Naturally, our facility meets our stringent requirements for quality, safety, and sustainability.