Zr55Al10Ni5Cu30合金熔体与不锈钢的润湿行为

用座滴法研究了Zr55Al10Ni5Cu30合金熔体与不锈钢基片在连续升温和不同温度下保温20 min的润湿动力学,用扫描电镜观察了润湿冷凝样品的界面形貌,用能谱分析、X射线衍射等研究了界面反应,分析了Zr55-Al10Ni5Cu30与不锈钢基片之间的扩散和界面问题.结果表明:随着温度的升高,Zr55Al10Ni5Cu30与不锈钢基片之间的润湿角减小,润湿半径增大;1 223,1 273 K时等温润湿动力学分3个阶段:孕育阶段、准稳态减小阶段和趋于平衡阶段,温度高于1 323 K时润湿只有趋于平衡阶段;Zr55Al10Ni5Cu30合金与不锈钢之间的润湿为反应控制型润湿,界面处有明显的扩散层和界面反应层;合金熔体一侧含熔体与不锈钢反应生成的Cr2Zr,界面处含反应生成的Al5Cr;在制备Zr55Al10Ni5Cu30/不锈钢非晶复合材料时必须合理选择制备工艺,严格、控制界面反应.

Wetting behaviors of molten Zr55Al10Ni5Cu30 on 1Cr18Ni9Ti

By sessile drop technique the wetting behaviors of molten Zr_(55)Al_(10)Ni_5Cu_(30) on 1Cr18Ni9Ti substrate were studied. The micrographs of the interfaces at different temperatures were observed by SEM, the interface reactions were studied by EDS and X-ray diffraction analysis, and the problems of diffusion and interface were also analyzed. The results show that the contact angle of molten Zr_(55)Al_(10)Ni_5Cu_(30) and 1Cr18Ni9Ti substrate decreases as the temperature increases. The drop radius increases but the contact angle decreases as the temperature increases. The wetting process is divided into three phases at 1 223 K and 1 273 K, but there is only equilibrium phase when the temperature is above 1 323 K. The behaviors between Zr_(55)Al_(10)Ni_5Cu_(30) and 1Cr18Ni9Ti belong to reactive wetting controlled by diffusion. There are distinct diffusion layers and reaction layers at the interfaces. The reaction product Cr_2Zr is made in the side of molten Zr_(55)Al_(10)Ni_5Cu_(30), and Al_5Cr is produced at the interface. The appropriate preparing technique must be chosen and the reaction at the interface must be controlled when the stainless steel-reinforced Zr_(55)Al_(10)-(Ni_5Cu_(30)) bulk metal glass is prepared.