Diffusion Bonding Furnaces

Diffusion bonding is a joining process that is becoming increasingly popular due to the high quality of the joints it achieves. For multilayer components with flat, but also tapered or spherical contact surfaces, diffusion bonding achieves an ideal joint. In this process, filler materials are not required. Consequently, the process is considered "non-toxic" and "non-corrosive" from the point of view of potential cross-contamination. Therefore, there is no need for any elaborate post-cleaning of the components. The resulting welded joints are optically and microscopically indistinguishable from the microstructure of the base materials.

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At a glance, diffusion bonding means for you:

Pore-free, visually imperceptible joints

Strength of the joint close to the basic strength of the material

Highest corrosion resistance, as no foreign materials are involved in the joining process

Large-area joints without distortion

Materials of the same and different types can be joined

Our diffusion bonding furnaces

PVA Industrial Vacuum Systems GmbH offers diffusion bonding systems for different requirements. Our team of experts advises and carries out processes for you in our in-house facilities, the quality of which will convince you.

The types of furnaces

The hot presses are generally designed for temperatures up to 1350 °C and achieve pressing forces of up to 800 tons. For larger press platens, the forces are transmitted by means of multi-pillar technology to ensure optimum and homogeneous force distribution. Oil diffusion pumps or turbomolecular pumps are used to generate the high vacuum. The systems can be equipped with two different types of heating elements: For carbon-sensitive and carboninsensitive materials.

Furnace for carbon sensitive materials

The "MOV-HP" is our diffusion bonding system with all-metal heating insert. The series can be used for all diffusion bonding materials, including those materials that have a particular sensitivity to carbon, such as titanium alloys, special nickel-based alloys or low-C stainless steels. Similarly, this type of furnace is excellent for diffusion bonding of aluminum components where no surface pretreatment is required. Typical examples are plates with cooling channel structures, ("Cooling Plates").

Furnace for materials without increased carbon sensitivity

The "COV-HP" is the diffusion bonding furnace with heating insert made of graphite materials. The series can be used for all diffusion-bonding materials that have no particular sensitivity to carbon. At the same time, the systems are characterized by particular robustness, durability and economy.

Application areas and markets

Diffusion bonding technology has a wide range of applications in a wide variety of markets. Because it allows the joining of small components through to large components, many industries benefit from this process. These include:

Semiconductor industry

Aerospace

Plastic injection molding

Medical technology

Power engineering

Electromobility

High-performance electronics

Typical workpieces for these industries include planar heat exchangers, cooling plates, turbine parts, shower heads, high-performance heat exchangers, and other components. Since internal complex geometries are possible, diffusion bonding is also suitable for mold and tool making with near-contour cooling channels.

Feel free to contact us for advice regarding your project!

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PVA Industrial Vacuum Systems GmbH
Im Westpark 10–12
35435 Wettenberg, Germany

Phone: +49 (641) 68690-140/-141
Fax: +49 (641) 68690-822