Friction and Wear Characteristics of Brush Plating Ni/nano-Al2O3 Composite Coating under Sand-Containing Oil

材料科学技术（英文）, 2005, 21(1): 100-104.

^1, , ^2, , ^3, , ^4, , ^5, , ^6, , ^7,

1.College of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China

2.National Key Laboratory for Remanufacturing, Academy of Armored Force Engineering, Beijing 100072, China

3.National Key Laboratory for Remanufacturing, Academy of Armored Force Engineering, Beijing 100072, China

4.National Key Laboratory for Remanufacturing, Academy of Armored Force Engineering, Beijing 100072, China

5.National Key Laboratory for Remanufacturing, Academy of Armored Force Engineering, Beijing 100072, China

6.National Key Laboratory for Remanufacturing, Academy of Armored Force Engineering, Beijing 100072, China

7.National Key Laboratory for Remanufacturing, Academy of Armored Force Engineering, Beijing 100072, China

基金项目: 国家自然科学基金(50235030) 国家重点基础研究发展计划(973计划)(G1999065009) their supports are gratefully acknowledged the Science and Technology Cooperation Project between China and Poland Governments(2002M3)

Friction and Wear Characteristics of Brush Plating Ni/nano-Al2O3 Composite Coating under Sand-Containing Oil

Keywords： Brush plating

Ni-matrix composite coating containing Al2O3 nano-particles is prepared by brush plating. The effects of the nanoparticles on the microstructure, microhardness and tribological properties of the composite coating under the lubrication of a diesel oil containing sand are investigated. The results show that the microstructure of the composite coating is finer than that of the pure nickel coating due to the codeposition of the nano-particles. When the nano-particle concentration in the electroplating bath reaches 20 g/L, the microhardness, and wear resistance of the composite coating is as much as 1.6 times and 1.3～2.5 times of those of the pure nickel coating respectively. The main hardening mechanism of the composite coating is superfine crystal grain strengthening and dispersion strengthening. The composite coating is characterized by scuffing as it slides against Si3N4 under the present test conditions.

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Friction and Wear Characteristics of Brush Plating Ni/nano-Al2O3 Composite Coating under Sand-Containing Oil

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