纳米Al_2O_3颗粒含量对复合镀层组织和滑动磨损行为的影响  

Effects of Al_2O_3 Nanoparticle Content on Structure and Sliding Wear Behavior of the Composite Plating

作　　者：王红美[1] 徐滨士[1] 马世宁[1] 董世运[1] 

机构地区：[1]装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072

出　　处：《金属热处理》2005年第4期10-14,共5页Heat Treatment of Metals

基　　金：国家自然科学基金重点项目 ( 50235030 );国家 973项目(G1999065009);中英政府科技合作项目(2002M3)

摘　　要：采用电刷镀技术在45钢表面制备了纳米Al2O3 颗粒增强镍基复合镀层,研究了纳米Al2O3 颗粒在镀液中的含量对镀层的组织、力学性能和摩擦学性能的影响,并分析探讨了影响机理。结果表明,随着镀液中纳米Al2O3 颗粒含量的增加,复合镀层的组织趋于细化,在含量为20g/L时复合镀层的硬度和耐磨性出现极值,其磨损机制也随之发生改变,这与纳米Al2O3 颗粒在复合镀层中的含量和分布状态密切相关。Ni based composite plating reinforced by Al_2O_3 nanoparticles was prepared on 45 steel by electro-brush plating.Effects of Al_2O_3 nanoparticle content in the solution on microstructure,mechanical properties and sliding wear behavior of the composite plating were studied,and the effect mechanism was discussed.The results show that the microstructure is refined gradually with the increase of Al_2O_3 nanoparticle content in the solution,while the microhardness and wear resistance appeares maximal values when Al_2O_3 nanoparticle content is 20g/L,and the wearing mechanism of the plating also changes at that content value.This is attributed to the content and distribution of Al_2O_3 nanoparticle in composite coating.

关 键 词：电刷镀 纳米复合镀层 滑动磨损性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TQ153.2[金属学及工艺—金属学]