IyasKhaderab AlexanderRenzb AndreasKailerb DanielHaasc
aDepartment of Industrial Engineering, German Jordanian University, P.O. Box 35247, 11180 Amman, Jordan
bFraunhofer Institute for Mechanics of Materials IWM, Woehlerstr. 11, 79108 Freiburg, Germany
cFCT Ingenieurkeramik GmbH, Gewerbepark 11, 96528 Frankenblick, Germany
Due to the high melting temperature of copper and copper alloys, conventional die-steel components used in pressure die casting these materials exhibit short service lifetimes and undergo thermal fatigue. Thermal and corrosion properties of silicon nitride were studied to assess the material’s applicability in substituting conventional die-steels in casting copper and copper alloys. In this study, experiments were conducted to test the thermal shock resistance and corrosion behaviour of a commercial silicon nitride in contact with molten pure copper. The results did not indicate any corrosive reaction between silicon nitride and pure copper. However, the presence of copper oxides at high temperatures accelerated the oxidation of the ceramic resulting in considerable loss of material. The thermal shock behaviour of silicon nitride proved to be adequate for the application.
Silicon nitride, Copper casting, Die casting, Oxidation, Corrosion