HIP BrazingTHE JOINING OF TWO INCOMPATIBLE MATERIALS MAY NOT BE POSSIBLE VIA SIMPLE HIP DIFFUSION BONDING.
It is necessary in this case to use a brazing interlayer which is compatible to both materials.
In cases where conventional brazing does not provide sufficient integrity, such an interlayer, used with encapsulation techniques and hot isostatic pressing provides the solution.
Principle
The manufacture of composites via diffusion bonding is limited if the difference in the thermal expansion coefficient of the materials is very high, there is no solubility in the solid state or unwanted high levels of diffusion occur. In these cases an interlayer is necessary.
This interlayer is able to reduce the stresses depending on the difference in thermal expansion coefficient. It may have solid solubility with both partners or may reduce unwanted diffusion.
Encapsulation and HIP will give a complete bonding of the braze material, with no porosity.
Advantages
The range of possible material combinations to composites is much widened using the technology of HIP brazing.
The designer may combine and use very different material properties in close proximity in a small space. Such composites may fulfil roles closed to conventional materials.
Divergent material properties may be combined without complex design.
Applications:
Wear protection
Heat Shields
Granulation of plastic materials
Automotive wear parts
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