(1. 沈阳航空工业学院 材料工程系, 沈阳 110034;
2. 中国科学院 金属研究所, 沈阳 110016)
摘 要: 采用座滴法研究了真空条件下1 180～1 220 ℃ 之间Fe78B13Si9熔体在纯铁上的润湿行为, 结合De Gennes液滴润湿动力学模型分析了Fe78B13Si9熔体在纯铁上的润湿动力学。 结果表明： Fe78B13Si9熔体与铁间有良好的润湿性, 平衡接触角在10°～40°之间; Fe78B13Si9熔体与铁的润湿为反应性润湿, 润湿过程中由于熔体与基体之间的溶解和相互扩散, 熔体体积首先增大, 然后随着熔体等温凝固的进行又逐渐减小; 由于熔滴体积在润湿过程中不断变化, 以及测量接触角与实际接触角的差异, De Gennes液滴润湿动力学模型不能描述Fe78B13Si9熔体在铁基体上的铺展规律。
关键字: Fe78B13Si9; 润湿; 液/固界面; 扩散; 溶解
（1. Department of Material Engineering,
Shenyang Institute of Aeronautic Engineering, Shenyang 110034, China;
2. Institute of Metal Research, Chinese Academy of Sciences,
Shenyang 110016, China）
Abstract: The wetting behavior of Fe78B13Si9 molten on iron was studied by the sessile drop method in vacuum between 1 180 and 1 220 ℃. Wetting dynamics of Fe78B13Si9 molten on iron was analyzed using De Gennes wetting dynamics model. The results show that there is a good wettability in Fe78B13Si9 molten/Fe wetting system between 1 180 and 1 220 ℃. The equilibrium contact angle is 10°-40°. The wetting of Fe78B13Si9 molten on Fe is a reactive wetting. The dissolution and diffusion between molten and substrate result in an increase of the drop volume at the first wetting stage. The volume of drop decrease, in the following stage because of the isothermal solidification of molten. Due to the change of drop volume and discrepancy between measured contact angle and actual value, the wetting dynamics of Fe78B13Si9 molten on iron is out of accordance with De Gennes wetting dynamics model.
Key words: Fe78B13Si9; wetting; liquid/solid interface; diffusion; dissolution
