(1. 常州大學(xué) 機械工程學(xué)院，常州 213164；
2. 常州大學(xué) 江蘇省材料表面科學(xué)與技術(shù)重點實驗室，常州 213164)
摘 要: 采用化學(xué)鍍方法在5052鋁合金表面制備一層非晶態(tài)Ni-P鍍層，用掃描電鏡、能譜儀、X射線衍射儀等對Ni-P鍍層形貌、化學(xué)成分和物相進行分析和表征。通過磨損試驗測試其摩擦因數(shù)和磨損性能，并對其磨損機理進行分析。結(jié)果表明：化學(xué)鍍非晶態(tài)Ni-P鍍層由直徑為10~50 μm原子團簇組成，能夠完全覆蓋基體，鍍層表面顯微硬度為370.5HV；鍍層與基體結(jié)合較好，其厚度為20 μm左右；Ni-P鍍層主要由Ni和P組成，其中Ni原子結(jié)合能為853.34 eV，P原子結(jié)合能為133.02 eV；鍍層摩擦因數(shù)為0.4556，磨損質(zhì)量損失減少83.5%，其磨損形式為磨粒磨損；鍍層摩擦區(qū)邊緣發(fā)生裂紋萌生和擴展，產(chǎn)生脆性剝落，鍍層未被磨穿，Ni-P鍍層的抗磨損性能較好。
關(guān)鍵字: Ni-P鍍層；5052鋁合金；摩擦因數(shù)；磨損性能
（1. College of Mechanical Engineering, Changzhou University, Changzhou 213164, China;
2. Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, China）
Abstract:Amorphous Ni-P coating was prepared on the surface of 5052 aluminum alloy by electroless plating, the morphologies, compositions and phases of the coating were analyzed and characterized with SEM, EDS and XRD, respectively. The friction coefficients and wear performances of Ni-P coating and 5052 aluminum alloy were investigated with wear test, the wear resistance mechanism of Ni-P coating was discussed. The results show that Ni-P coating by chemical plating is composed of atom clusters with the diameter of 10-50 μm, which can cover the substrate completely; the surface micro-hardness is 370.5HV. Ni-P coating is well bonded with the substrate, and the coating thickness is about 20 μm. Ni-P coating is composed of Ni and P atoms, in which the bonding energy of Ni atom is 853.34 eV, while that of P atom is 133.02 eV. The friction coefficient of Ni-P coating is 0.4556, the wear mass loss decreases by 83.5% compared with that of the substrate, and the wear mechanism is abrasive wear. The micro-crack initiation and propagation are produced and peeled at the wear edge, and the coating is not worn out, showing good wear performances.
Key words: Ni-P coating; aluminum alloy 5052; friction coefficient; wear performance
