碳纳米管添加剂对ZL109铝合金微弧氧化陶瓷层的生长及耐磨性能影响  

Effects of Carbon Nanotube Additive Applied to ZL109 Aluminum Alloy Microarc Oxidation Ceramic Coating on Growth and Wear-Resisting Performance

作　　者：赵春生[1] 刘正祥[2] 马春生[3] ZHAO Chunsheng;LIU Zhengxiang;MA Chunsheng(Department of Marine Electrical and Intelligent Engineering,Jiangsu Maritime Vocational and Technical College,Nanjing Jiangsu 211170,China;Jiangsu Ocean Shipping Co.,Ltd.,Nanjing Jiangsu 210009,China;Department of Marine Engineering,Dalian Maritime University,Dalian Liaoning 116026,China)

机构地区：[1]江苏海事职业技术学院轮机电气与智能工程学院,江苏南京211170 [2]江苏远洋运输有限公司,江苏南京210009 [3]大连海事大学轮机工程学院,辽宁大连116026

出　　处：《润滑与密封》2021年第12期93-98,共6页Lubrication Engineering

基　　金：交通运输部应用基础研究项目(2015-329-225-230)。

摘　　要：为进一步提高ZL109铝合金的耐磨性能,在微弧氧化电解液中加入碳纳米管添加剂,探究碳纳米管对ZL109铝合金微弧氧化陶瓷层生长及耐磨性能的影响。在电解液中分别加入0.4~2 g/L碳纳米管,在双极性脉冲恒压模式下制备得到ZL109铝合金微弧氧化陶瓷层;从表面特征、微观形貌、厚度、物相组成等方面进行陶瓷层生长行为的分析,并利用往复式摩擦磨损试验机探讨陶瓷层的耐磨性能。结果表明:碳纳米管电解液添加剂对陶瓷层生长过程影响较大,显著改变了陶瓷层的基本特征,使得原有表面的孔隙率和孔径显著下降,但过高的碳纳米管浓度会导致表面出现显著的不均匀的突起;碳纳米管未直接参与陶瓷层成膜,而是通过自身的较高的存储介电微充电能力影响了微弧放电过程中单位通道面积内生成的氧化产物的量,从而对陶瓷层各项特征产生显著的影响;添加碳纳米管后陶瓷层摩擦因数有所增大,但耐磨性能大幅提升,其中添加1.2 g/L碳纳米管制备得到的陶瓷层具有较好的耐磨性能,具有较低且稳定的摩擦因数。In order to improve the wear resistance of ZL109 aluminum alloy, carbon nanotube additives were added to the micro-arc oxidation electrolyte to explore the influence of carbon nanotube on the growth and wear resistance of micro-arc oxidation ceramic layer of ZL109 aluminum alloy.ZL109 aluminum alloy micro-arc oxidation ceramic layers were prepared by adding 0.4 g/L to 2 g/L carbon nanotubes into the electrolyte under bipolar pulse constant pressure mode.The growth behavior of ceramic layer was analyzed by the aspects of surface characteristics, microstructure, thickness and phase composition, and the wear resistance of ceramic layer was investigated by reciprocating friction and wear testing machine.The results show that the effect of the electrolyte additive(carbon nanotube) on the growth process of ceramic layers is significant, the characteristics of ceramic layers are significantly changed, the porosity and aperture of the original surface are dramatically lower, but the high concentration carbon nanotube can cause uneven fluctuations on the surface.The carbon nanotube is not directly involved in the ceramic layer, but affect the amount of oxidation products per unit channel area in the process of micro arc discharge through its high storage dielectric microcharging ability, which has a obvious effect on the characteristics of the ceramic layer.The friction coefficient of ceramic layers is increased after the addition of carbon nanotube, but the wear resistance is greatly improved.The ceramic layer prepared by adding 1.2 g/L carbon nanotube has good wear resistance and low and stable friction coefficient.

关 键 词：碳纳米管 ZL109铝合金 微弧氧化 耐磨 

分 类 号：TH117.1[机械工程—机械设计及理论] U664.121[交通运输工程—船舶及航道工程]