Preparation of Functional Black Cr-C Nano-composites Coatings and Its Influencing Factors

Li Xuesong1; Wu Hua1; Yang You1

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Preparation of Functional Black Cr-C Nano-composites Coatings and Its Influencing Factors
Issue 7, Pages: 504-507(2007)
Published： 2007 ，
DOI：

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[1]李雪松,吴化,杨友.黑Cr-C纳米复合功能镀层的制备及影响因素[J].特种铸造及有色合金,2007(07):504-507+488.

Li Xuesong1, Wu Hua1, Yang You1. Preparation of Functional Black Cr-C Nano-composites Coatings and Its Influencing Factors. [J]. Special Casting & Nonferrous Alloys (7):504-507(2007)
[1]李雪松,吴化,杨友.黑Cr-C纳米复合功能镀层的制备及影响因素[J].特种铸造及有色合金,2007(07):504-507+488. DOI：

Li Xuesong1, Wu Hua1, Yang You1. Preparation of Functional Black Cr-C Nano-composites Coatings and Its Influencing Factors. [J]. Special Casting & Nonferrous Alloys (7):504-507(2007) DOI：

摘要

研究镀液中纳米C颗粒浓度、电流密度、温度、搅拌方式等对复合电沉积Cr-C镀层性能的影响。利用扫描电镜（SEM）和X射线衍射仪（XRD）分析镀层表面显微组织及相结构

利用显微硬度计对复合镀层进行显微硬度测试。结果表明

调整工艺参数可获得表面结晶均匀致密的黑Cr-C纳米复合镀层

显微硬度最高达10·8GPa

镀层中颗粒体积分数最高达8·82%。电沉积复合镀最佳工艺参数是:电流密度为100A/dm2、温度为15℃、镀液中纳米C颗粒含量为10g/L

采用超声波分散辅助慢速机械搅拌。

Abstract

The influences of nano-carbon particle concentration in bath

current density

temperature and stirring method on the properties of electro-deposited Cr-C composite coating have been investigated.The surface morphology and phase structure of the coating were analyzed by scanning electronic microscopy（SEM） and X-ray diffractometer（XRD）

and its micro-hardness was determined by micrometer.The results indicate that the black Cr-C composite coatings with compact and uniformly distribution structure can be generated by adjusting the processing parameters

where the maximum micro-hardness can reach 10.8 GPa and maximum particle volume fraction in the coating can reach 8.82%.The optimized processing parameters for electro-depositing composite coating are as follows:current density of 100 A·dm-2

temperature of 15 ℃ and nano-carbon concentration in bath of 10 g·L-1.In addition

ultrasonic disperse was used to assist slowly mechanical stirring.