Effect of C and Hf Contents on the Interface Reactions and Wettability between a Ni3Al-Based Superalloy and Ceramic Mould Material

doi:10.1016/j.jmst.2015.11.007

Abstract

Abstract: The influence of active elements C and Hf on the interface reactions and wettability between a Ni₃Al-based superalloy and the ceramic mould material was studied by using a sessile drop experiment. The microstructure of the alloy interface was investigated by scanning electron microscopy analysis and the phase identification was performed by X-ray diffraction analysis. The results show that interface reactions occur as C and Hf contents reach a critical value. The critical values for C and Hf to cause interface reactions are 0.12 wt% and 1.17 wt%, respectively. The reaction products contain HfO₂ and 9Al₂O₃·Cr₂O₃. Adsorptions of Hf and interface reactions improve the wettability obviously.

Key words: Superalloys, Ceramic, Interface reaction, Wettability, C, Hf

Xiaoyan Chen, Yizhou Zhou, Tao Jin, Xiaofeng Sun. Effect of C and Hf Contents on the Interface Reactions and Wettability between a Ni₃Al-Based Superalloy and Ceramic Mould Material[J]. J. Mater. Sci. Technol., 2016, 32(2): 177-181.

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Effect of C and Hf Contents on the Interface Reactions and Wettability between a Ni₃Al-Based Superalloy and Ceramic Mould Material

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