(裝甲兵工程學(xué)院 裝備再制造技術(shù)國防科技重點(diǎn)實(shí)驗(yàn)室， 北京 100072)
摘 要: 應(yīng)用納米復(fù)合電刷鍍技術(shù)制備了納米氧化鋁/鎳復(fù)合鍍層， 采用透射電鏡、 XPS等現(xiàn)代分析技術(shù)和性能評價(jià)手段研究了納米顆粒對鎳刷鍍層組織和性能的影響。結(jié)果表明： 納米顆粒在復(fù)合刷鍍層中彌散分布、 粒度均勻， 與基質(zhì)鎳金屬以化學(xué)鍵結(jié)合； 納米顆粒增加了基質(zhì)金屬的成核率， 細(xì)化了鍍層組織， 顯著提高了刷鍍層的硬度和耐磨性。與鎳金屬刷鍍層相比， 復(fù)合刷鍍層硬度和耐磨性分別提高0.5倍和1.5倍以上。 復(fù)合刷鍍層的組織特征合理地解釋了納米顆粒對其性能影響的機(jī)理。
關(guān)鍵字: 納米顆粒； 刷鍍層； 組織； 性能
properties of electrobrush plated nickel coating
（National Laboratory for Remanufacturing,
Academy of Armored Forces Engineering,
Beijing 100072, China）
Abstract:Nanoparticle reinforced nickel matrix composite (n-Al2O3/Ni) coatings were fabricated by electrobrush plating technique. Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) techniques were employed to study the effects of the nano-particle on microstructure and properties of n-Al2O3/Ni composite coatings. It is revealed that the nano-particles disperse in the coatings evenly and take chemical bonds to the matrix (metal nickel). In fact, nano-particles enhance inhomogeneous nucleation of matrix during the composite formation by electrobrush plating, and refine the microstructure of the composite coatings. Nano-particles can obviously improve hardness and wear resistance of the electronbrush plated metal coatings. Compared with the nickel metal coatings, the hardness and wear resistance of n-Al2O3/Ni composite coatings increase by 0.5 times and 1.5 times, respectively. Microstructure characteristics properly elucidate the effect and mechanism of nano-particle improving properties of the electrobrush plated coatings.
Key words: nano-particles; electrobrush plated coatings; microstructure; properties
