(1. 沈陽(yáng)航空工業(yè)學(xué)院 材料工程系, 沈陽(yáng) 110034;
2. 中國(guó)科學(xué)院 金屬研究所, 沈陽(yáng) 110016)
摘 要: 采用座滴法研究了真空條件下1 180～1 220 ℃ 之間Fe78B13Si9熔體在純鐵上的潤(rùn)濕行為, 結(jié)合De Gennes液滴潤(rùn)濕動(dòng)力學(xué)模型分析了Fe78B13Si9熔體在純鐵上的潤(rùn)濕動(dòng)力學(xué)。 結(jié)果表明： Fe78B13Si9熔體與鐵間有良好的潤(rùn)濕性, 平衡接觸角在10°～40°之間; Fe78B13Si9熔體與鐵的潤(rùn)濕為反應(yīng)性潤(rùn)濕, 潤(rùn)濕過(guò)程中由于熔體與基體之間的溶解和相互擴(kuò)散, 熔體體積首先增大, 然后隨著熔體等溫凝固的進(jìn)行又逐漸減小; 由于熔滴體積在潤(rùn)濕過(guò)程中不斷變化, 以及測(cè)量接觸角與實(shí)際接觸角的差異, De Gennes液滴潤(rùn)濕動(dòng)力學(xué)模型不能描述Fe78B13Si9熔體在鐵基體上的鋪展規(guī)律。
關(guān)鍵字: Fe78B13Si9; 潤(rùn)濕; 液/固界面; 擴(kuò)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
