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Improved Precision Casting of Titanium Alloys Using Calcium Zirconate Moulds

However, the quality of titanium cast parts is not only determined by the interface reaction with the mould, but also by the surface quality and the reproduced shape details. The mould production by dip-coating is state-of-the-art. In order to further improve the precision of cast parts, calcium zirconate (CaZrO3) coatings were manufactured via the replica technique, enabling functional coatings for titanium casting moulds by spraying and centrifuging [1]. Moreover, casting trials investigated the corrosion resistance of CaZrO3 moulds, which were compared to a commercially available system containing silica. CaZrO3 showed a very weak reaction, indicated by small oxygen contents and thereby low surface hardness of the titanium cast parts [2].


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