(1. 哈爾濱工業(yè)大學(xué)材料科學(xué)與工程學(xué)院，哈爾濱150001;
2. 山東科技大學(xué)表面工程研究所， 泰安271019)
摘 要: 用特殊制樣手段在TEM上直接觀察鎳鈷磷合金化學(xué)沉積的初期形貌。結(jié)果表明，化學(xué)沉積的初期沉積過程具有明顯的擇優(yōu)傾向和不均勻性。原子并非以單個原子的形式沉積于基體表面，而是還原后的原子在固-液界面處首先形成原子團，然后在基體表面的高能量區(qū)域優(yōu)先沉積。隨著時間的延長，沉積晶粒的長大傾向并不明顯，而是以沉積顆粒逐步鏈狀聯(lián)結(jié)的方式擴展，直至覆蓋整個基體表面。
關(guān)鍵字: 化學(xué)鍍；初期沉積；鎳鈷磷合金
（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
