(1. 哈尔滨工业大学材料科学与工程学院，哈尔滨150001;
2. 山东科技大学表面工程研究所， 泰安271019)
摘 要: 用特殊制样手段在TEM上直接观察镍钴磷合金化学沉积的初期形貌。结果表明，化学沉积的初期沉积过程具有明显的择优倾向和不均匀性。原子并非以单个原子的形式沉积于基体表面，而是还原后的原子在固-液界面处首先形成原子团，然后在基体表面的高能量区域优先沉积。随着时间的延长，沉积晶粒的长大倾向并不明显，而是以沉积颗粒逐步链状联结的方式扩展，直至覆盖整个基体表面。
关键字: 化学镀；初期沉积；镍钴磷合金
（1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P.R.China;
2. Shandong University of Science and Technology, Tai'an 271019, P.R.China）
Abstract: The behaviours of the initial depositing stage of electroless Ni-Co-P alloy plating on nickel and carbon steel by special sample preparation methods and TEM was studied. It is evidently that there are the phenomena of preferred orientation as well as inhomogeneity during the initial depositing process. The reduced atoms can't directly, individually deposit on the surface of the matrix, they form atomic crystal at the interface between solid-liquid first, then preferably deposit on the high energy region of the matrix surface; with the increase of depositing time, the growth tendency for atomic crystal is not very clear. The depositing atomic crystals join together with chain shape step by step until covering all over the matrix surface.
Key words: electroless plating; initial depositing stage; Ni-Co-P alloy
