【摘要】 <正> 要在金属表面获得滴状冷凝,必须降低其表面能。迄今为止,一般采用在金属表面外加一层具有低表面能的材料,靠物理或化学吸附作用与表面结合。这些方法存在污染冷凝液、腐蚀表面、附加热阻等问题。文献[2]曾提出将表面科学、材料科学和表面技术结合起来,开发一种新途径解决上述方法中存在的问题。本文在此基础上采用离子镀和离更多还原

【Abstract】 The ion-plating and the ion-beam mixing technology was employed to prepare surface alloys on a copper tube. Two elements chosen are Bi and CH4. The experimental results of steam condensation on the external surface of the vertical copper tubes were obtained.The surface characteristics of alloy layer were analysed by using the electron spectroscopy and the ion microprobe.The mechanism for dropwise condensation formed on the new surfaces were analysed.更多还原