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Home » Technologies & Materials » Shaping, Drying, Debinding » Strength Optimisation of a Zirconia-Ceramic Made Using Additive Manufacturing (LCM)-Technology

Strength Optimisation of a Zirconia-Ceramic Made Using Additive Manufacturing (LCM)-Technology

Additive Manufacturing (AM) is a new method for the production of ceramic components. It enables the processing of complex ceramic components with very little limitations. To establish new process routes and to get specimens and components having a high strength, it is necessary to optimize the whole manufacturing process. In this work, the influence of the composition of the slurry on the strength of an yttria-stabilized zirconia ceramic is investigated. Strength characterisation was done directly on the as-fired surfaces using Ballon- Three-Balls (B3B) tests. It was shown that the composition of the slurry (variation of binder system to adjust the viscosity) as well as the used printing parameters have strong influence on the development of different defects (especially pores) which may become strength limiting. To identify weak parts in the AM ceramic materials, strength tests on AM specimens were performed and a fractographic analysis was made. It was shown that lowering the viscosity of the slurry and an optimizing of the printing conditions caused a dramatic reduction of pores, and therefore a 40 % increase of strength.

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