(1. 河南科技大學 機電工程學院，洛陽 471003；
2. 河南科技大學 河南省機械設(shè)計及傳動系統(tǒng)重點實驗室，洛陽 471003)
摘 要: 采用直流電沉積、脈沖電沉積和超聲輔助脈沖電沉積制備Ni-CeO2納米復(fù)合鍍層，研究電沉積方式對納米復(fù)合鍍層表面形貌、顯微硬度和摩擦磨損性能的影響，并用掃描電子顯微鏡分析其磨損機理。結(jié)果表明：電沉積方式對Ni-CeO2納米復(fù)合鍍層的晶粒尺寸和性能有較大影響；當超聲波引入脈沖電沉積過程時，超聲波的強力攪拌作用和超聲空化效應(yīng)能促進CeO2納米顆粒在鍍層中均勻分布，進一步減小鍍層的晶粒尺寸，明顯提高鍍層的顯微硬度，從而改善鍍層的摩擦磨損性能；Ni-CeO2納米復(fù)合鍍層的摩擦磨損性能均優(yōu)于純Ni鍍層的；而超聲輔助脈沖電沉積制備的Ni-CeO2納米復(fù)合鍍層的晶粒更加細小、顯微硬度最高，其摩擦因數(shù)最低，耐磨損性能最佳。
關(guān)鍵字: 電沉積；超聲波；Ni-CeO2納米復(fù)合鍍層；摩擦磨損性能
wear properties of Ni-CeO2 nanocomposite coatings
（1. School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471003, China;
2. Henan Key Laboratory for Machinery Design and Transmission System,
Henan University of Science and Technology, Luoyang 471003, China）
Abstract:The Ni-CeO2 nanocomposite coatings were fabricated by direct current electrodeposition, pulse current electrodeposition and ultrasonic-assisted pulse electrodeposition. The effects of electrodeposition methods on the surface morphology, microhardness as well as friction and wear properties of the Ni-CeO2 nanocomposite coatings were investigated. The wear mechanism of the nanocomposite coatings was analyzed using a scanning electron microscope (SEM). The results show that the electrodeposition methods can markedly affect the grain sizes and the properties of Ni-CeO2 nanocomposite coatings. While the ultrasound is introduced in the pulse electrodeposition process, the strong stirring action and the cavitating effect of ultrasound not only promot the uniform distribution of CeO2 nanoparticles in the coatings, but also reduce the grain sizes further, which leads to the enhancement of the microhardness of the coatings and then improves the friction and wear properties of the coatings. The friction and wear properties of the Ni-CeO2 nanocomposite coatings are better than those of the pure Ni coating. The Ni-CeO2 nanocomposite coatings prepared by ultrasonic-assisted pulse electrodeposition, which possess finer grains and highest microhardness, exhibit the lowest friction coefficient and the best wear-resistance.
Key words: electrodeposition; ultrasound; Ni-CeO2 nanocomposite coating; friction and wear property
