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FP5

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Project ID: G5RD-CT-2000-00354
Finanziato nell'ambito di: FP5-GROWTH
Paese: Germany

Generating structural and strength data on EPD test specimens and components

The actual production process of ceramic hip joint heads ("ball heads") and cup inserts ("liners") includes spray drying and green machining. The electrophoretic deposition process (EPD) would allow the elimination of theses processes. In addition, the EPD process would allow to advantageously combining the properties of alumina and zirconia in a "functionally graded material". Alumina would act as the wear resisting outer layer, whereas zirconia would be used as a strong core material. By an appropriate combination of these materials a compression stress would be set up in the alumina surface thus increasing the load bearing capability of the component and, as a consequence, further increasing the � already high � reliability of ceramic components in total hip joint replacement.

The contribution of CeramTec was:

- characterizing structural and especially strength properties of homogeneous and graded test specimens and components.

The strength results on ball heads are promising, both EPD and SSC technology must be further improved. The current stage of development has to be classified as "Experimental development stage".

Informazioni correlate

Contatto

Stephan HECHT, (Dr / Manager Material and Component Evaluation)
Tel.: +49-71-53611474
Fax: +49-71-53611491
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