Hot isostatic pressing

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Hot isostatic pressing (HIP) is a development in manufacturing technology in which powders and solids , especially ceramics and metals , are hot-pressed and sintered at the same time .

The component is inserted into a deformable, tight container. This container is placed in a heatable pressure vessel and the component is compressed under protective gas at temperatures of up to 2000 ° C and pressures of 100 to 200  MPa . The gas pressure acts on the workpiece from all sides, so that the component has isotropic properties. Open pores cannot be re-compressed because the gas will penetrate into these pores. The recompaction can only be carried out with closed porosity .

Components manufactured in this way are extremely dense and have isotropic properties. A major disadvantage of this technology is the very high production costs, especially with low dimensional tolerances. Main field of application is the recompression of sintered metal and ceramic workpieces for air and space travel , the automotive industry or medical implants .