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Effect of C and Hf Contents on the Interface Reactions and Wettability between a Ni_3Al-Based Superalloy and Ceramic Mould Material
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| 【文章作者】Xiaoyan Chen;Yizhou Zhou;Tao Jin;Xiaofeng Sun; |
| 【文章摘要】 The influence of active elements C and Hf on the interface reactions and wettability between a Ni_3Albased 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 HfO_2 and 9Al_2O_3-Cr_2O_3.Adsorptions of Hf and interface reactions improve the wettability obviously. |
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