Hot isostatic pressing

Hot isostatic pressing (HIP ) is a development for the manufacturing technique of powders and solids, especially ceramics and metals are pressed and sintered at the same time hot.

The component is used here in a deformable, tight container. This container is heated in a pressure vessel, and the component is compacted at temperatures up to 2000 ° C and pressures of 100 to 200 MPa in an inert gas. The gas pressure acts on all sides of the workpiece, so that the component is replaced by isotropic properties. Open pores can not be densified while, as the gas will penetrate into these pores. The recompression can be done only with closed porosity.

Components that are prepared, are extremely dense and have isotropic properties. A great drawback of this technique is the very high production costs, especially in small dimensional tolerance. Main area of ​​application is the recompression of sintered metallic and ceramic workpieces for aerospace, automotive or medical implants.

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