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。
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.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2007年第7期504-507,共4页
Special Casting & Nonferrous Alloys
基金
长春工业大学科技发展基金资助项目(2006001)
关键词
电沉积
黑Cr-C纳米复合镀层
显微形貌
显微硬度
Electro-deposition,Black Cr-C Nano-composite Coating,Microstructure,Micro-hardness
