Wetting behavior of Zr_(55)Cu_(30)Al_(10)Ni_5 melt on alumina

摘要

The wetting behavior of molten Zr_(55)Cu_(30)Al_(10)Ni_5 on A1_2O_3 was studied by the sessile drop method in high vacuum. The results show that wetting kinetic at 1 163 K is composed of three stages: incubation, quasi-steady decrease and trend constant. Precursor film forms surrounding the wetting tip when wetting temperature is above 1163 K. Formation of precursor film is related to the change of triple line configuration and results in good wettability. Chemical reaction dos not occur at the wetting interface. A1_2O_3 is an excellent reinforcement for Zr_(55)Cu_(30)Al_(10)Ni_5 matrix composite in terms of wettability and reactivity. The kinetic relationship of spreading ratio with spreading time was also investigated.